<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019ce3d2-0cac-779a-945b-0622c134ac9e,g:74b6d768-84bb-4530-a32c-5396bc8a629e-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="sgry-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019ce3d2-0ebf-74f6-81eb-f55fbaba4f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019ce3d2-0ebf-7d06-b4b5-041f4edf7204" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019ce3d2-0ebf-74f6-81eb-f55fbaba4f2d" xlink:to="loc_us-gaap_StatementTable_019ce3d2-0ebf-7d06-b4b5-041f4edf7204" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019ce3d2-0ebf-7477-85e3-c181caa3b992" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019ce3d2-0ebf-7d06-b4b5-041f4edf7204" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019ce3d2-0ebf-7477-85e3-c181caa3b992" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7477-85e3-c181caa3b992_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019ce3d2-0ebf-7477-85e3-c181caa3b992" xlink:to="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7477-85e3-c181caa3b992_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019ce3d2-0ebf-7477-85e3-c181caa3b992" xlink:to="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019ce3d2-0ebf-721d-b0bd-d7b2994ade3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:to="loc_us-gaap_CommonStockMember_019ce3d2-0ebf-721d-b0bd-d7b2994ade3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019ce3d2-0ebf-79a0-afcc-e7297620b5f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019ce3d2-0ebf-79a0-afcc-e7297620b5f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_019ce3d2-0ebf-7a1f-ad56-6c0bbc91f520" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:to="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_019ce3d2-0ebf-7a1f-ad56-6c0bbc91f520" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019ce3d2-0ebf-7736-8656-8ab3e148eeab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:to="loc_us-gaap_RetainedEarningsMember_019ce3d2-0ebf-7736-8656-8ab3e148eeab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019ce3d2-0ebf-73fd-838e-427c50d8bdf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ce3d2-0ebf-7c33-ba1f-b0e50c888183" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019ce3d2-0ebf-73fd-838e-427c50d8bdf4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019ce3d2-0ebf-74f6-81eb-f55fbaba4f2d" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019ce3d2-0ebf-7357-9898-da0311da2701" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019ce3d2-0ebf-7357-9898-da0311da2701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ce3d2-0ebf-763e-a77f-c46414d4a035" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ce3d2-0ebf-763e-a77f-c46414d4a035" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_019ce3d2-0ebf-7c59-acb0-660dd8638429" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_019ce3d2-0ebf-7c59-acb0-660dd8638429" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019ce3d2-0ebf-7dbe-8f5f-7f2d0031187b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019ce3d2-0ebf-7dbe-8f5f-7f2d0031187b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019ce3d2-0ebf-79d8-80e3-df13b2b61ef3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019ce3d2-0ebf-79d8-80e3-df13b2b61ef3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019ce3d2-0ebf-7eb7-abbc-4eb9b0f5934f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019ce3d2-0ebf-7eb7-abbc-4eb9b0f5934f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_NonControllingInterestAcquisitionsAndDisposalsOfInterestsHeldByNonControllingInterestHoldersNet_019ce3d2-0ebf-765e-9364-51ce565915b0" xlink:href="sgry-20260331.xsd#sgry_NonControllingInterestAcquisitionsAndDisposalsOfInterestsHeldByNonControllingInterestHoldersNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_sgry_NonControllingInterestAcquisitionsAndDisposalsOfInterestsHeldByNonControllingInterestHoldersNet_019ce3d2-0ebf-765e-9364-51ce565915b0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019ce3d2-0ebf-7a87-897f-a03b7af0f3b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ce3d2-0ebf-706c-a953-ec18e7c2eed3" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019ce3d2-0ebf-7a87-897f-a03b7af0f3b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019ce3d2-0ebf-768a-a456-05668ff374a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ce3d2-0ec0-79b2-b6b8-6d9b229c8882" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#OrganizationandSummaryofAccountingPoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductInformationLineItems_019ce3d2-0ec0-79c9-8a60-0ca43bfc8911" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_019ce3d2-0ec0-74a9-80c9-18c5bab4373d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfProductInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductInformationLineItems_019ce3d2-0ec0-79c9-8a60-0ca43bfc8911" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_019ce3d2-0ec0-74a9-80c9-18c5bab4373d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-78f2-9b3d-af53b7a468b6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_019ce3d2-0ec0-74a9-80c9-18c5bab4373d" xlink:to="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-78f2-9b3d-af53b7a468b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-78f2-9b3d-af53b7a468b6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-78f2-9b3d-af53b7a468b6" xlink:to="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-78f2-9b3d-af53b7a468b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7cfb-8e09-0843c98f493e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-78f2-9b3d-af53b7a468b6" xlink:to="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7cfb-8e09-0843c98f493e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_FacilitiesAmbulatorySurgeryCentersMember_019ce3d2-0ec0-7e15-8a0d-5bbac6e17a9a" xlink:href="sgry-20260331.xsd#sgry_FacilitiesAmbulatorySurgeryCentersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7cfb-8e09-0843c98f493e" xlink:to="loc_sgry_FacilitiesAmbulatorySurgeryCentersMember_019ce3d2-0ec0-7e15-8a0d-5bbac6e17a9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_FacilitiesSurgicalHospitalsMember_019ce3d2-0ec0-7eab-9b13-30525a2efc92" xlink:href="sgry-20260331.xsd#sgry_FacilitiesSurgicalHospitalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7cfb-8e09-0843c98f493e" xlink:to="loc_sgry_FacilitiesSurgicalHospitalsMember_019ce3d2-0ec0-7eab-9b13-30525a2efc92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_NumberOfSurgicalFacilitiesOwned_019ce3d2-0ec0-729e-9bcb-3ef412b804c7" xlink:href="sgry-20260331.xsd#sgry_NumberOfSurgicalFacilitiesOwned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019ce3d2-0ec0-79c9-8a60-0ca43bfc8911" xlink:to="loc_sgry_NumberOfSurgicalFacilitiesOwned_019ce3d2-0ec0-729e-9bcb-3ef412b804c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_019ce3d2-0ec0-786c-a004-cf35cef91796" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019ce3d2-0ec0-79c9-8a60-0ca43bfc8911" xlink:to="loc_us-gaap_NumberOfStatesInWhichEntityOperates_019ce3d2-0ec0-786c-a004-cf35cef91796" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_NumberOfSurgicalFacilitiesOwnedMajorityInterest_019ce3d2-0ec0-7660-a0f7-bac0e699927f" xlink:href="sgry-20260331.xsd#sgry_NumberOfSurgicalFacilitiesOwnedMajorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019ce3d2-0ec0-79c9-8a60-0ca43bfc8911" xlink:to="loc_sgry_NumberOfSurgicalFacilitiesOwnedMajorityInterest_019ce3d2-0ec0-7660-a0f7-bac0e699927f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_NumberOfSurgicalFacilitiesOwnedConsolidated_019ce3d2-0ec0-7273-86b9-8a2c792e4ff9" xlink:href="sgry-20260331.xsd#sgry_NumberOfSurgicalFacilitiesOwnedConsolidated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019ce3d2-0ec0-79c9-8a60-0ca43bfc8911" xlink:to="loc_sgry_NumberOfSurgicalFacilitiesOwnedConsolidated_019ce3d2-0ec0-7273-86b9-8a2c792e4ff9" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesScheduleofRevenuesbyServiceTypeDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#OrganizationandSummaryofAccountingPoliciesScheduleofRevenuesbyServiceTypeDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesScheduleofRevenuesbyServiceTypeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019ce3d2-0ec0-7ff8-babe-9bc3f5404aa5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019ce3d2-0ec0-7f95-ad90-898efa1a0d51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019ce3d2-0ec0-7ff8-babe-9bc3f5404aa5" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019ce3d2-0ec0-7f95-ad90-898efa1a0d51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-7566-89fd-1219f7f5e7f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019ce3d2-0ec0-7f95-ad90-898efa1a0d51" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-7566-89fd-1219f7f5e7f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-7566-89fd-1219f7f5e7f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-7566-89fd-1219f7f5e7f5" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-7566-89fd-1219f7f5e7f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-7ce1-926a-7e4b3d725598" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-7566-89fd-1219f7f5e7f5" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-7ce1-926a-7e4b3d725598" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductConcentrationRiskMember_019ce3d2-0ec0-7169-b55c-fc64fc283221" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-7ce1-926a-7e4b3d725598" xlink:to="loc_us-gaap_ProductConcentrationRiskMember_019ce3d2-0ec0-7169-b55c-fc64fc283221" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-7946-a47c-56713d67dc36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019ce3d2-0ec0-7f95-ad90-898efa1a0d51" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-7946-a47c-56713d67dc36" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7946-a47c-56713d67dc36_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-7946-a47c-56713d67dc36" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7946-a47c-56713d67dc36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7488-b345-301da8004d89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-7946-a47c-56713d67dc36" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7488-b345-301da8004d89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019ce3d2-0ec0-754b-8061-efe0d32ca4c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7488-b345-301da8004d89" xlink:to="loc_us-gaap_SalesRevenueNetMember_019ce3d2-0ec0-754b-8061-efe0d32ca4c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-74cd-99ee-cd088f810bb9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019ce3d2-0ec0-7f95-ad90-898efa1a0d51" xlink:to="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-74cd-99ee-cd088f810bb9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-74cd-99ee-cd088f810bb9_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-74cd-99ee-cd088f810bb9" xlink:to="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-74cd-99ee-cd088f810bb9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7ae6-a84d-c59b9b111115" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-74cd-99ee-cd088f810bb9" xlink:to="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7ae6-a84d-c59b9b111115" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-74c4-a762-573db1f62792" xlink:href="sgry-20260331.xsd#sgry_HealthcareOrganizationPatientServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7ae6-a84d-c59b9b111115" xlink:to="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-74c4-a762-573db1f62792" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_OtherServicesMember_019ce3d2-0ec0-718b-9440-70129df40716" xlink:href="sgry-20260331.xsd#sgry_OtherServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7ae6-a84d-c59b9b111115" xlink:to="loc_sgry_OtherServicesMember_019ce3d2-0ec0-718b-9440-70129df40716" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019ce3d2-0ec0-7958-9099-34f417da0f9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019ce3d2-0ec0-7ff8-babe-9bc3f5404aa5" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019ce3d2-0ec0-7958-9099-34f417da0f9a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesScheduleofRevenuesbySourcesDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#OrganizationandSummaryofAccountingPoliciesScheduleofRevenuesbySourcesDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesScheduleofRevenuesbySourcesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019ce3d2-0ec0-726f-87a9-c69cd79b0a90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019ce3d2-0ec0-731d-91f0-eb2edb0a8ad2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019ce3d2-0ec0-726f-87a9-c69cd79b0a90" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019ce3d2-0ec0-731d-91f0-eb2edb0a8ad2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-7303-81b1-27985e638d21" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019ce3d2-0ec0-731d-91f0-eb2edb0a8ad2" xlink:to="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-7303-81b1-27985e638d21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7303-81b1-27985e638d21_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-7303-81b1-27985e638d21" xlink:to="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7303-81b1-27985e638d21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7c5f-9a9e-0b227ffb9451" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019ce3d2-0ec0-7303-81b1-27985e638d21" xlink:to="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7c5f-9a9e-0b227ffb9451" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-7e1a-9159-8532670fa0e5" xlink:href="sgry-20260331.xsd#sgry_HealthcareOrganizationPatientServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7c5f-9a9e-0b227ffb9451" xlink:to="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-7e1a-9159-8532670fa0e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_PrivateInsuranceMember_019ce3d2-0ec0-7475-8647-c92e56cf20e5" xlink:href="sgry-20260331.xsd#sgry_PrivateInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-7e1a-9159-8532670fa0e5" xlink:to="loc_sgry_PrivateInsuranceMember_019ce3d2-0ec0-7475-8647-c92e56cf20e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_GovernmentRevenueMember_019ce3d2-0ec0-7cb4-a258-36daeca27e99" xlink:href="sgry-20260331.xsd#sgry_GovernmentRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-7e1a-9159-8532670fa0e5" xlink:to="loc_sgry_GovernmentRevenueMember_019ce3d2-0ec0-7cb4-a258-36daeca27e99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SelfPayRevenueMember_019ce3d2-0ec0-7e27-bc5a-1a5a2c200f81" xlink:href="sgry-20260331.xsd#sgry_SelfPayRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-7e1a-9159-8532670fa0e5" xlink:to="loc_sgry_SelfPayRevenueMember_019ce3d2-0ec0-7e27-bc5a-1a5a2c200f81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_OtherPatientServiceRevenueSourcesMember_019ce3d2-0ec0-7c45-974c-fad3a64dd73f" xlink:href="sgry-20260331.xsd#sgry_OtherPatientServiceRevenueSourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_HealthcareOrganizationPatientServiceMember_019ce3d2-0ec0-7e1a-9159-8532670fa0e5" xlink:to="loc_sgry_OtherPatientServiceRevenueSourcesMember_019ce3d2-0ec0-7c45-974c-fad3a64dd73f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_OtherServicesMember_019ce3d2-0ec0-7e14-a9c1-740af676f22e" xlink:href="sgry-20260331.xsd#sgry_OtherServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ce3d2-0ec0-7c5f-9a9e-0b227ffb9451" xlink:to="loc_sgry_OtherServicesMember_019ce3d2-0ec0-7e14-a9c1-740af676f22e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-77d2-8417-2900777904e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019ce3d2-0ec0-731d-91f0-eb2edb0a8ad2" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-77d2-8417-2900777904e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-77d2-8417-2900777904e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-77d2-8417-2900777904e4" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-77d2-8417-2900777904e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-74c7-bdcf-ae525ab1705a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019ce3d2-0ec0-77d2-8417-2900777904e4" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-74c7-bdcf-ae525ab1705a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019ce3d2-0ec0-7f33-bd9c-c3cb02384986" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019ce3d2-0ec0-74c7-bdcf-ae525ab1705a" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019ce3d2-0ec0-7f33-bd9c-c3cb02384986" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-71b5-ab33-db3d9ca0c561" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019ce3d2-0ec0-731d-91f0-eb2edb0a8ad2" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-71b5-ab33-db3d9ca0c561" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-71b5-ab33-db3d9ca0c561_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-71b5-ab33-db3d9ca0c561" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-71b5-ab33-db3d9ca0c561_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7fea-b9e2-15f944c76db8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019ce3d2-0ec0-71b5-ab33-db3d9ca0c561" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7fea-b9e2-15f944c76db8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019ce3d2-0ec0-7cfe-8faf-b61618717def" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019ce3d2-0ec0-7fea-b9e2-15f944c76db8" xlink:to="loc_us-gaap_SalesRevenueNetMember_019ce3d2-0ec0-7cfe-8faf-b61618717def" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019ce3d2-0ec0-72c6-b72a-f0f59178dde3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019ce3d2-0ec0-726f-87a9-c69cd79b0a90" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019ce3d2-0ec0-72c6-b72a-f0f59178dde3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019ce3d2-0ec0-7ecd-8645-67932449aee9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019ce3d2-0ec0-726f-87a9-c69cd79b0a90" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019ce3d2-0ec0-7ecd-8645-67932449aee9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesScheduleofCarryingAmountandFairValueofLongTermDebtDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#OrganizationandSummaryofAccountingPoliciesScheduleofCarryingAmountandFairValueofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesScheduleofCarryingAmountandFairValueofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019ce3d2-0ec0-7509-8fe0-2569809de7b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019ce3d2-0ec0-7384-8442-00ed44917552" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019ce3d2-0ec0-7509-8fe0-2569809de7b3" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019ce3d2-0ec0-7384-8442-00ed44917552" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-7663-b9de-ec73fe8df4a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019ce3d2-0ec0-7384-8442-00ed44917552" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-7663-b9de-ec73fe8df4a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7663-b9de-ec73fe8df4a3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-7663-b9de-ec73fe8df4a3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7663-b9de-ec73fe8df4a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-715b-b678-9f7b62def537" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-7663-b9de-ec73fe8df4a3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-715b-b678-9f7b62def537" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019ce3d2-0ec0-78db-93b8-e1737f97245c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-715b-b678-9f7b62def537" xlink:to="loc_us-gaap_SecuredDebtMember_019ce3d2-0ec0-78db-93b8-e1737f97245c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019ce3d2-0ec0-7834-bf00-f107fd164783" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-715b-b678-9f7b62def537" xlink:to="loc_us-gaap_SeniorNotesMember_019ce3d2-0ec0-7834-bf00-f107fd164783" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7e30-a507-fa56b258df4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019ce3d2-0ec0-7384-8442-00ed44917552" xlink:to="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7e30-a507-fa56b258df4d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-7e30-a507-fa56b258df4d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7e30-a507-fa56b258df4d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-7e30-a507-fa56b258df4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-724b-925e-d6f27f68c1f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7e30-a507-fa56b258df4d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-724b-925e-d6f27f68c1f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_A2017TermLoanMaturing2024Member_019ce3d2-0ec0-7fca-80c7-c4f255375ea1" xlink:href="sgry-20260331.xsd#sgry_A2017TermLoanMaturing2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-724b-925e-d6f27f68c1f7" xlink:to="loc_sgry_A2017TermLoanMaturing2024Member_019ce3d2-0ec0-7fca-80c7-c4f255375ea1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SeniorUnsecuredNotesDue2032Member_019ce3d2-0ec0-71a8-bc7b-42140b6da007" xlink:href="sgry-20260331.xsd#sgry_SeniorUnsecuredNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-724b-925e-d6f27f68c1f7" xlink:to="loc_sgry_SeniorUnsecuredNotesDue2032Member_019ce3d2-0ec0-71a8-bc7b-42140b6da007" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019ce3d2-0ec0-7430-8ec8-00d46f845ec4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019ce3d2-0ec0-7384-8442-00ed44917552" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019ce3d2-0ec0-7430-8ec8-00d46f845ec4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019ce3d2-0ec0-7430-8ec8-00d46f845ec4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019ce3d2-0ec0-7430-8ec8-00d46f845ec4" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019ce3d2-0ec0-7430-8ec8-00d46f845ec4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019ce3d2-0ec0-7b7a-80e9-0ffad936d4cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019ce3d2-0ec0-7430-8ec8-00d46f845ec4" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019ce3d2-0ec0-7b7a-80e9-0ffad936d4cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019ce3d2-0ec0-74ec-a575-a916c27598d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019ce3d2-0ec0-7b7a-80e9-0ffad936d4cf" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019ce3d2-0ec0-74ec-a575-a916c27598d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019ce3d2-0ec0-7aea-8c02-103e9e25fe0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019ce3d2-0ec0-74ec-a575-a916c27598d7" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019ce3d2-0ec0-7aea-8c02-103e9e25fe0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019ce3d2-0ec0-705b-8498-49bdad2ccfaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019ce3d2-0ec0-74ec-a575-a916c27598d7" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019ce3d2-0ec0-705b-8498-49bdad2ccfaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ce3d2-0ec0-7d1c-a4ce-cc734bdbe2d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019ce3d2-0ec0-7384-8442-00ed44917552" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ce3d2-0ec0-7d1c-a4ce-cc734bdbe2d9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ce3d2-0ec0-7d1c-a4ce-cc734bdbe2d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ce3d2-0ec0-7d1c-a4ce-cc734bdbe2d9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ce3d2-0ec0-7d1c-a4ce-cc734bdbe2d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ce3d2-0ec0-7164-a941-32d7a5e1461d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ce3d2-0ec0-7d1c-a4ce-cc734bdbe2d9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ce3d2-0ec0-7164-a941-32d7a5e1461d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019ce3d2-0ec0-75c8-b604-4dc7e22845ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ce3d2-0ec0-7164-a941-32d7a5e1461d" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019ce3d2-0ec0-75c8-b604-4dc7e22845ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019ce3d2-0ec0-7dfb-806a-b837c6b7673c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019ce3d2-0ec0-7509-8fe0-2569809de7b3" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019ce3d2-0ec0-7dfb-806a-b837c6b7673c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019ce3d2-0ec0-7fe9-8e34-823606d1240e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019ce3d2-0ec0-7509-8fe0-2569809de7b3" xlink:to="loc_us-gaap_LongTermDebt_019ce3d2-0ec0-7fe9-8e34-823606d1240e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesVariableInterestEntitiesDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#OrganizationandSummaryofAccountingPoliciesVariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/OrganizationandSummaryofAccountingPoliciesVariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_019ce3d2-0ec0-726f-ab4a-508ae0ee729a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019ce3d2-0ec0-7c3b-8ee7-b2c8a31f7089" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019ce3d2-0ec0-726f-ab4a-508ae0ee729a" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019ce3d2-0ec0-7c3b-8ee7-b2c8a31f7089" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019ce3d2-0ec0-7eec-8139-160620132f4d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019ce3d2-0ec0-7c3b-8ee7-b2c8a31f7089" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019ce3d2-0ec0-7eec-8139-160620132f4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019ce3d2-0ec0-7eec-8139-160620132f4d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019ce3d2-0ec0-7eec-8139-160620132f4d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019ce3d2-0ec0-7eec-8139-160620132f4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019ce3d2-0ec0-757d-beb1-c7db0978fe15" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019ce3d2-0ec0-7eec-8139-160620132f4d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019ce3d2-0ec0-757d-beb1-c7db0978fe15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019ce3d2-0ec0-7ab0-a22f-73dad492be36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019ce3d2-0ec0-757d-beb1-c7db0978fe15" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019ce3d2-0ec0-7ab0-a22f-73dad492be36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_VariableInterestEntityNumberOfFacilities_019ce3d2-0ec0-7114-ae41-877e08775418" xlink:href="sgry-20260331.xsd#sgry_VariableInterestEntityNumberOfFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019ce3d2-0ec0-726f-ab4a-508ae0ee729a" xlink:to="loc_sgry_VariableInterestEntityNumberOfFacilities_019ce3d2-0ec0-7114-ae41-877e08775418" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019ce3d2-0ec0-7615-9ae8-18346ea75e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019ce3d2-0ec0-726f-ab4a-508ae0ee729a" xlink:to="loc_us-gaap_Assets_019ce3d2-0ec0-7615-9ae8-18346ea75e9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019ce3d2-0ec0-746c-a908-f43a5997b577" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019ce3d2-0ec0-726f-ab4a-508ae0ee729a" xlink:to="loc_us-gaap_Liabilities_019ce3d2-0ec0-746c-a908-f43a5997b577" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/AcquisitionsDisposalsandDeconsolidationsDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#AcquisitionsDisposalsandDeconsolidationsDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/AcquisitionsDisposalsandDeconsolidationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019ce3d2-0ec0-7029-93ec-c885905ece9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019ce3d2-0ec0-7029-93ec-c885905ece9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019d856b-cd8f-70aa-98e1-506cf8f9eae0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019ce3d2-0ec0-7029-93ec-c885905ece9a" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019d856b-cd8f-70aa-98e1-506cf8f9eae0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019d856b-cd8f-70aa-98e1-506cf8f9eae0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019d856b-cd8f-70aa-98e1-506cf8f9eae0" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019d856b-cd8f-70aa-98e1-506cf8f9eae0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019d856b-cd8f-77d1-8ab3-21099e01df6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019d856b-cd8f-70aa-98e1-506cf8f9eae0" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019d856b-cd8f-77d1-8ab3-21099e01df6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilitiesMember_019d856b-cd8f-77e2-952b-6c4e5099f0a4" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019d856b-cd8f-77d1-8ab3-21099e01df6a" xlink:to="loc_sgry_SurgicalFacilitiesMember_019d856b-cd8f-77e2-952b-6c4e5099f0a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilitiesPhysicianPracticesAndOtherAncillaryBusinessesMember_019d87e6-78d2-797f-b3b9-609aee83c24e" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilitiesPhysicianPracticesAndOtherAncillaryBusinessesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019d856b-cd8f-77d1-8ab3-21099e01df6a" xlink:to="loc_sgry_SurgicalFacilitiesPhysicianPracticesAndOtherAncillaryBusinessesMember_019d87e6-78d2-797f-b3b9-609aee83c24e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_019d856b-cd8f-750f-872c-1450ec047185" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019ce3d2-0ec0-7029-93ec-c885905ece9a" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_019d856b-cd8f-750f-872c-1450ec047185" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019d856b-cd8f-750f-872c-1450ec047185_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019d856b-cd8f-750f-872c-1450ec047185" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019d856b-cd8f-750f-872c-1450ec047185_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019d856b-cd8f-7868-9abc-2a206177142a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019d856b-cd8f-750f-872c-1450ec047185" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019d856b-cd8f-7868-9abc-2a206177142a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_019d856b-cd8f-7bcb-affc-c224730555b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019d856b-cd8f-7868-9abc-2a206177142a" xlink:to="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_019d856b-cd8f-7bcb-affc-c224730555b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019d856b-cd8f-7664-866f-7af70de826f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019ce3d2-0ec0-7029-93ec-c885905ece9a" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019d856b-cd8f-7664-866f-7af70de826f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7664-866f-7af70de826f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019d856b-cd8f-7664-866f-7af70de826f9" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7664-866f-7af70de826f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7054-8b35-ed131fcbada2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019d856b-cd8f-7664-866f-7af70de826f9" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7054-8b35-ed131fcbada2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilityAndEquityMethodInvestmentMember_019db3e6-237e-7e2f-a8ee-50ca209c2d8c" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilityAndEquityMethodInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7054-8b35-ed131fcbada2" xlink:to="loc_sgry_SurgicalFacilityAndEquityMethodInvestmentMember_019db3e6-237e-7e2f-a8ee-50ca209c2d8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilityWithARetainedInterestMember_019d856b-cd8f-776f-bfd8-f67ef89542f3" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilityWithARetainedInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7054-8b35-ed131fcbada2" xlink:to="loc_sgry_SurgicalFacilityWithARetainedInterestMember_019d856b-cd8f-776f-bfd8-f67ef89542f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilityAndPhysicianPracticeMember_019d856b-cd8f-71e1-9a98-557a1908f87f" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilityAndPhysicianPracticeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019d856b-cd8f-7054-8b35-ed131fcbada2" xlink:to="loc_sgry_SurgicalFacilityAndPhysicianPracticeMember_019d856b-cd8f-71e1-9a98-557a1908f87f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfBusinessesAcquired_019d856b-cd8f-7e34-9a6a-2ddade9b3bee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfBusinessesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_NumberOfBusinessesAcquired_019d856b-cd8f-7e34-9a6a-2ddade9b3bee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019d856b-cd8f-7441-bddc-d3f4952efbca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019d856b-cd8f-7441-bddc-d3f4952efbca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_019d856b-cd8f-7f8b-8aed-d66fa3857a20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_019d856b-cd8f-7f8b-8aed-d66fa3857a20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019d856b-cd8f-7dcf-a6df-632564d2c27f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_Goodwill_019d856b-cd8f-7dcf-a6df-632564d2c27f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_NumberOfNonControllingInterestsAcquired_019d856b-cd8f-7300-8d28-64bc362ac3ab" xlink:href="sgry-20260331.xsd#sgry_NumberOfNonControllingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_sgry_NumberOfNonControllingInterestsAcquired_019d856b-cd8f-7300-8d28-64bc362ac3ab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_DisposalGroupNotDiscontinuedOperationNumberOfBusinessesDisposed_019d856b-cd8f-7e06-b85d-bdfb22ed42e9" xlink:href="sgry-20260331.xsd#sgry_DisposalGroupNotDiscontinuedOperationNumberOfBusinessesDisposed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_sgry_DisposalGroupNotDiscontinuedOperationNumberOfBusinessesDisposed_019d856b-cd8f-7e06-b85d-bdfb22ed42e9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019db3dc-50e9-752f-bebc-88a38f9376ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019db3dc-50e9-752f-bebc-88a38f9376ba" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_019d856b-cd8f-7b55-8dcc-c264af9aaad1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_019d856b-cd8f-7b55-8dcc-c264af9aaad1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019d856b-cd8f-7f97-aa9f-f94782358f6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019d856b-cd8f-700e-849f-e2e2a08c350e" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019d856b-cd8f-7f97-aa9f-f94782358f6e" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/LongTermDebtScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#LongTermDebtScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/LongTermDebtScheduleofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-79f9-9598-8790068cc137" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-79f9-9598-8790068cc137" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-73ba-9b94-e944f67a8d48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-79f9-9598-8790068cc137" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-73ba-9b94-e944f67a8d48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-73ba-9b94-e944f67a8d48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-73ba-9b94-e944f67a8d48" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-73ba-9b94-e944f67a8d48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7b61-84a8-b83ee246616f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019ce3d2-0ec0-73ba-9b94-e944f67a8d48" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7b61-84a8-b83ee246616f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019ce3d2-0ec0-7742-8887-f6614cbc6c3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7b61-84a8-b83ee246616f" xlink:to="loc_us-gaap_SecuredDebtMember_019ce3d2-0ec0-7742-8887-f6614cbc6c3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019ce3d2-0ec0-7a59-9374-9926e8ef47e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7b61-84a8-b83ee246616f" xlink:to="loc_us-gaap_SeniorNotesMember_019ce3d2-0ec0-7a59-9374-9926e8ef47e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_NotesPayableAndSecuredLoansMember_019ce3d2-0ec0-7460-b129-9dcf1278456f" xlink:href="sgry-20260331.xsd#sgry_NotesPayableAndSecuredLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ce3d2-0ec0-7b61-84a8-b83ee246616f" xlink:to="loc_sgry_NotesPayableAndSecuredLoansMember_019ce3d2-0ec0-7460-b129-9dcf1278456f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7999-b597-fcc56c229344" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-79f9-9598-8790068cc137" xlink:to="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7999-b597-fcc56c229344" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-7999-b597-fcc56c229344_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7999-b597-fcc56c229344" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-7999-b597-fcc56c229344_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-72d2-9554-07e31f633ce1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019ce3d2-0ec0-7999-b597-fcc56c229344" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-72d2-9554-07e31f633ce1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_A2017TermLoanMaturing2024Member_019ce3d2-0ec0-7d94-8524-24938202d959" xlink:href="sgry-20260331.xsd#sgry_A2017TermLoanMaturing2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-72d2-9554-07e31f633ce1" xlink:to="loc_sgry_A2017TermLoanMaturing2024Member_019ce3d2-0ec0-7d94-8524-24938202d959" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_A2017SeniorSecuredCreditFacilityMember_019ce3d2-0ec0-7986-9a1f-54077b16f586" xlink:href="sgry-20260331.xsd#sgry_A2017SeniorSecuredCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-72d2-9554-07e31f633ce1" xlink:to="loc_sgry_A2017SeniorSecuredCreditFacilityMember_019ce3d2-0ec0-7986-9a1f-54077b16f586" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SeniorUnsecuredNotesDue2032Member_019ce3d2-0ec0-794e-9ce5-f249041734c3" xlink:href="sgry-20260331.xsd#sgry_SeniorUnsecuredNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ce3d2-0ec0-72d2-9554-07e31f633ce1" xlink:to="loc_sgry_SeniorUnsecuredNotesDue2032Member_019ce3d2-0ec0-794e-9ce5-f249041734c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019ce3d2-0ec0-740c-b02e-498d5abedb4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019ce3d2-0ec0-740c-b02e-498d5abedb4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_019ce3d2-0ec0-7066-8352-746e48f99e18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_FinanceLeaseLiability_019ce3d2-0ec0-7066-8352-746e48f99e18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019ce3d2-0ec0-7a20-a135-ff5123e641d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019ce3d2-0ec0-7a20-a135-ff5123e641d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019ce3d2-0ec0-7bb1-a11b-1c934c1c2a56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019ce3d2-0ec0-7bb1-a11b-1c934c1c2a56" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019ce3d2-0ec0-7728-b046-7a90fd20d4c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019ce3d2-0ec0-7728-b046-7a90fd20d4c9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019ce3d2-0ec0-7eeb-ba1c-084cd1ac9fb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019ce3d2-0ec0-7eeb-ba1c-084cd1ac9fb9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019ce3d2-0ec0-7459-82a8-ebd72fe1facc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019ce3d2-0ec0-7459-82a8-ebd72fe1facc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_019ce3d2-0ec0-7da0-860a-4666c642f672" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ce3d2-0ec0-7979-8fc9-d069a3ba42c9" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_019ce3d2-0ec0-7da0-860a-4666c642f672" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/LongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#LongTermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/LongTermDebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019d76a8-a735-7830-84d0-c30523b38137" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-7c27-97f5-c46cb613ea80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019d76a8-a735-7830-84d0-c30523b38137" xlink:to="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-7c27-97f5-c46cb613ea80" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019d76a8-a735-7b23-9cb3-bc3bafa30b89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-7c27-97f5-c46cb613ea80" xlink:to="loc_us-gaap_CreditFacilityAxis_019d76a8-a735-7b23-9cb3-bc3bafa30b89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019d76a8-a735-7b23-9cb3-bc3bafa30b89_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019d76a8-a735-7b23-9cb3-bc3bafa30b89" xlink:to="loc_us-gaap_CreditFacilityDomain_019d76a8-a735-7b23-9cb3-bc3bafa30b89_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019d76a8-a735-7688-9a86-83c3118381bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019d76a8-a735-7b23-9cb3-bc3bafa30b89" xlink:to="loc_us-gaap_CreditFacilityDomain_019d76a8-a735-7688-9a86-83c3118381bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019d76a8-a735-7b24-a581-3aee23f55d35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019d76a8-a735-7688-9a86-83c3118381bd" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019d76a8-a735-7b24-a581-3aee23f55d35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019d76a8-a735-70cc-82fd-21d5deb2aad2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019d76a8-a735-7688-9a86-83c3118381bd" xlink:to="loc_us-gaap_LetterOfCreditMember_019d76a8-a735-70cc-82fd-21d5deb2aad2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019d76a8-a735-7aba-a930-98e1849a8223" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-7c27-97f5-c46cb613ea80" xlink:to="loc_us-gaap_DebtInstrumentAxis_019d76a8-a735-7aba-a930-98e1849a8223" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019d76a8-a735-7aba-a930-98e1849a8223_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019d76a8-a735-7aba-a930-98e1849a8223" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019d76a8-a735-7aba-a930-98e1849a8223_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019d76a8-a735-7249-b4ff-81d60281b139" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019d76a8-a735-7aba-a930-98e1849a8223" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019d76a8-a735-7249-b4ff-81d60281b139" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_A2017SeniorSecuredCreditFacilityMember_019d76a8-a735-7db9-b2f1-e159dd7dbc1a" xlink:href="sgry-20260331.xsd#sgry_A2017SeniorSecuredCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019d76a8-a735-7249-b4ff-81d60281b139" xlink:to="loc_sgry_A2017SeniorSecuredCreditFacilityMember_019d76a8-a735-7db9-b2f1-e159dd7dbc1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_CreditFacilityMember_019d76a8-a735-7c15-b65b-c5ccfd93d17e" xlink:href="sgry-20260331.xsd#sgry_CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019d76a8-a735-7249-b4ff-81d60281b139" xlink:to="loc_sgry_CreditFacilityMember_019d76a8-a735-7c15-b65b-c5ccfd93d17e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019d76a8-a735-7fad-9744-818fdfdc10b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019ce3d2-0ec0-7c27-97f5-c46cb613ea80" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019d76a8-a735-7fad-9744-818fdfdc10b8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019d76a8-a735-7fad-9744-818fdfdc10b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019d76a8-a735-7fad-9744-818fdfdc10b8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019d76a8-a735-7fad-9744-818fdfdc10b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019d76a8-a735-70d3-be61-29f32e72f0c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019d76a8-a735-7fad-9744-818fdfdc10b8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019d76a8-a735-70d3-be61-29f32e72f0c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019d76a8-a735-75a7-9c39-878eeb935c43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019d76a8-a735-70d3-be61-29f32e72f0c7" xlink:to="loc_us-gaap_SecuredDebtMember_019d76a8-a735-75a7-9c39-878eeb935c43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019d76a8-a735-7668-a6c1-4b53b4cc9e44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019d76a8-a735-7830-84d0-c30523b38137" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019d76a8-a735-7668-a6c1-4b53b4cc9e44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019d76a8-a735-7a4e-8405-45fe79552b32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019d76a8-a735-7830-84d0-c30523b38137" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019d76a8-a735-7a4e-8405-45fe79552b32" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/DerivativesandHedgingActivitiesScheduleofInterestRateCapsOutstandingDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#DerivativesandHedgingActivitiesScheduleofInterestRateCapsOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/DerivativesandHedgingActivitiesScheduleofInterestRateCapsOutstandingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_019ce3d2-0f72-7e0d-ada3-a85f58282dfd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-74b1-bf22-33c06dc724d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_019ce3d2-0f72-7e0d-ada3-a85f58282dfd" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-74b1-bf22-33c06dc724d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-72b4-bd48-7c27721fde2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-74b1-bf22-33c06dc724d0" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-72b4-bd48-7c27721fde2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-72b4-bd48-7c27721fde2c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-72b4-bd48-7c27721fde2c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-72b4-bd48-7c27721fde2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-72b4-bd48-7c27721fde2c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_DeferredPremiumCap1Member_019ce3d2-0f72-7f3c-b101-1ccfd5c9d32b" xlink:href="sgry-20260331.xsd#sgry_DeferredPremiumCap1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:to="loc_sgry_DeferredPremiumCap1Member_019ce3d2-0f72-7f3c-b101-1ccfd5c9d32b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_DeferredPremiumCap2Member_019ce3d2-0f72-70d1-8d3f-9007bc72d844" xlink:href="sgry-20260331.xsd#sgry_DeferredPremiumCap2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:to="loc_sgry_DeferredPremiumCap2Member_019ce3d2-0f72-70d1-8d3f-9007bc72d844" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_DeferredPremiumCap3Member_019ce3d2-0f72-7fdd-8c3b-16e8d9d5e9c4" xlink:href="sgry-20260331.xsd#sgry_DeferredPremiumCap3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:to="loc_sgry_DeferredPremiumCap3Member_019ce3d2-0f72-7fdd-8c3b-16e8d9d5e9c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_DeferredPremiumCap4Member_019ce3d2-0f72-709c-b844-93a23f5804fd" xlink:href="sgry-20260331.xsd#sgry_DeferredPremiumCap4Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:to="loc_sgry_DeferredPremiumCap4Member_019ce3d2-0f72-709c-b844-93a23f5804fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_DeferredPremiumCap5Member_019ce3d2-0f72-7887-a560-d1f4ec74a1c5" xlink:href="sgry-20260331.xsd#sgry_DeferredPremiumCap5Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-7cee-91b3-ab55ce501a0f" xlink:to="loc_sgry_DeferredPremiumCap5Member_019ce3d2-0f72-7887-a560-d1f4ec74a1c5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019ce3d2-0f72-7861-9ac1-8d2092fd6505" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_019ce3d2-0f72-7e0d-ada3-a85f58282dfd" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019ce3d2-0f72-7861-9ac1-8d2092fd6505" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/DerivativesandHedgingActivitiesScheduleofDerivativeInstrumentsinStatementofFinancialPositionFairValueDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#DerivativesandHedgingActivitiesScheduleofDerivativeInstrumentsinStatementofFinancialPositionFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/DerivativesandHedgingActivitiesScheduleofDerivativeInstrumentsinStatementofFinancialPositionFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7fd3-ae4f-693a9752372b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7660-a8f7-a7ae85ce9f62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7fd3-ae4f-693a9752372b" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7660-a8f7-a7ae85ce9f62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-7ba7-9013-51cdd01713f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7660-a8f7-a7ae85ce9f62" xlink:to="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-7ba7-9013-51cdd01713f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-7ba7-9013-51cdd01713f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-7ba7-9013-51cdd01713f4" xlink:to="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-7ba7-9013-51cdd01713f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-7dba-8469-53e565ae4172" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-7ba7-9013-51cdd01713f4" xlink:to="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-7dba-8469-53e565ae4172" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019ce3d2-0f72-7605-b903-a6a1aa5f0287" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-7dba-8469-53e565ae4172" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019ce3d2-0f72-7605-b903-a6a1aa5f0287" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-74d3-a914-ae83122a41ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7660-a8f7-a7ae85ce9f62" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-74d3-a914-ae83122a41ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-74d3-a914-ae83122a41ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-74d3-a914-ae83122a41ab" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-74d3-a914-ae83122a41ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-722f-99ff-30ed9273e0ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019ce3d2-0f72-74d3-a914-ae83122a41ab" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-722f-99ff-30ed9273e0ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateCapMember_019ce3d2-0f72-7ab0-a1a6-8a8eb153a5af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateCapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019ce3d2-0f72-722f-99ff-30ed9273e0ab" xlink:to="loc_us-gaap_InterestRateCapMember_019ce3d2-0f72-7ab0-a1a6-8a8eb153a5af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount_019ce3d2-0f72-791b-9296-5b827212f56f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7fd3-ae4f-693a9752372b" xlink:to="loc_us-gaap_DerivativeLiabilityNotionalAmount_019ce3d2-0f72-791b-9296-5b827212f56f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/DerivativesandHedgingActivitiesScheduleofPretaxEffectofDerivativesonAOCIandStatementofOperationsDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#DerivativesandHedgingActivitiesScheduleofPretaxEffectofDerivativesonAOCIandStatementofOperationsDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/DerivativesandHedgingActivitiesScheduleofPretaxEffectofDerivativesonAOCIandStatementofOperationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7b3a-8753-773854d5cdad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7cae-949f-798c32e2b2a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7b3a-8753-773854d5cdad" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7cae-949f-798c32e2b2a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-78ea-a914-3e6716ece3bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019ce3d2-0f72-7cae-949f-798c32e2b2a7" xlink:to="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-78ea-a914-3e6716ece3bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-78ea-a914-3e6716ece3bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-78ea-a914-3e6716ece3bd" xlink:to="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-78ea-a914-3e6716ece3bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-757a-93ed-a16f20ad932f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019ce3d2-0f72-78ea-a914-3e6716ece3bd" xlink:to="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-757a-93ed-a16f20ad932f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019ce3d2-0f72-7561-8fac-f9ff244df669" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-757a-93ed-a16f20ad932f" xlink:to="loc_us-gaap_NondesignatedMember_019ce3d2-0f72-7561-8fac-f9ff244df669" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019ce3d2-0f72-79e1-9c27-ee253e53e9ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019ce3d2-0f72-757a-93ed-a16f20ad932f" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019ce3d2-0f72-79e1-9c27-ee253e53e9ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019ce3d2-0f72-76e8-9a0f-55e87c349f09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7b3a-8753-773854d5cdad" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019ce3d2-0f72-76e8-9a0f-55e87c349f09" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019ce3d2-0f72-7b36-a60b-5679203b8526" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7b3a-8753-773854d5cdad" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019ce3d2-0f72-7b36-a60b-5679203b8526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019ce3d2-0f72-7a9f-b258-1692b9aa9064" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019ce3d2-0f72-7b3a-8753-773854d5cdad" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019ce3d2-0f72-7a9f-b258-1692b9aa9064" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#EarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019ce3d2-0f72-7fd8-b695-3a037be2dd68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019ce3d2-0f72-7e42-be4b-2302098a55ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019ce3d2-0f72-7fd8-b695-3a037be2dd68" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019ce3d2-0f72-7e42-be4b-2302098a55ae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019ce3d2-0f72-7c18-8482-9dd429d4dc7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019ce3d2-0f72-7e42-be4b-2302098a55ae" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019ce3d2-0f72-7c18-8482-9dd429d4dc7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019ce3d2-0f72-7c18-8482-9dd429d4dc7a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019ce3d2-0f72-7c18-8482-9dd429d4dc7a" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019ce3d2-0f72-7c18-8482-9dd429d4dc7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019ce3d2-0f72-7f69-bb73-38cf7b0870cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019ce3d2-0f72-7c18-8482-9dd429d4dc7a" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019ce3d2-0f72-7f69-bb73-38cf7b0870cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019ce3d2-0f72-7c0d-b61c-20e27ff8c52c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019ce3d2-0f72-7f69-bb73-38cf7b0870cb" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019ce3d2-0f72-7c0d-b61c-20e27ff8c52c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019ce3d2-0f72-7cf7-83ab-e7cc79734308" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019ce3d2-0f72-7f69-bb73-38cf7b0870cb" xlink:to="loc_us-gaap_RestrictedStockMember_019ce3d2-0f72-7cf7-83ab-e7cc79734308" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAbstract_019ce3d2-0f72-79e3-a701-b9e34f7361c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019ce3d2-0f72-7fd8-b695-3a037be2dd68" xlink:to="loc_us-gaap_NetIncomeLossAbstract_019ce3d2-0f72-79e3-a701-b9e34f7361c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ce3d2-0f72-74b4-a51e-3ae8026666d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAbstract_019ce3d2-0f72-79e3-a701-b9e34f7361c9" xlink:to="loc_us-gaap_NetIncomeLoss_019ce3d2-0f72-74b4-a51e-3ae8026666d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019ce3d2-0f72-7f82-9142-2239b35302bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019ce3d2-0f72-7fd8-b695-3a037be2dd68" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019ce3d2-0f72-7f82-9142-2239b35302bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019ce3d2-0f72-7ed9-81b5-99b55979bb66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019ce3d2-0f72-7f82-9142-2239b35302bf" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019ce3d2-0f72-7ed9-81b5-99b55979bb66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019ce3d2-0f72-7497-bf1a-85e5486e39be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019ce3d2-0f72-7ed9-81b5-99b55979bb66" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019ce3d2-0f72-7497-bf1a-85e5486e39be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ce3d2-0f72-797e-ad34-f36e9171b2f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019ce3d2-0f72-7ed9-81b5-99b55979bb66" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ce3d2-0f72-797e-ad34-f36e9171b2f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareReconciliationAbstract_019ce3d2-0f72-7af2-8285-d5d16ed19d4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019ce3d2-0f72-7fd8-b695-3a037be2dd68" xlink:to="loc_us-gaap_EarningsPerShareReconciliationAbstract_019ce3d2-0f72-7af2-8285-d5d16ed19d4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019ce3d2-0f72-7015-b8b3-bbe182b8afc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_019ce3d2-0f72-7af2-8285-d5d16ed19d4e" xlink:to="loc_us-gaap_EarningsPerShareBasic_019ce3d2-0f72-7015-b8b3-bbe182b8afc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019ce3d2-0f72-7945-874c-c6abdb289d3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_019ce3d2-0f72-7af2-8285-d5d16ed19d4e" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019ce3d2-0f72-7945-874c-c6abdb289d3f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019ce3d2-0f72-74ba-9702-03afde1ab892" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019ce3d2-0f72-7fd8-b695-3a037be2dd68" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019ce3d2-0f72-74ba-9702-03afde1ab892" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/SegmentReportingScheduleofSegmentRevenueandOperatingIncomeDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#SegmentReportingScheduleofSegmentRevenueandOperatingIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/SegmentReportingScheduleofSegmentRevenueandOperatingIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7816-a385-88825a898a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7c8b-9b20-94b0a33c89c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7816-a385-88825a898a9f" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7c8b-9b20-94b0a33c89c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-757a-bc1c-b79d5a6c7814" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7c8b-9b20-94b0a33c89c9" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-757a-bc1c-b79d5a6c7814" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019ce3d2-0f72-757a-bc1c-b79d5a6c7814_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-757a-bc1c-b79d5a6c7814" xlink:to="loc_us-gaap_SegmentDomain_019ce3d2-0f72-757a-bc1c-b79d5a6c7814_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019ce3d2-0f72-76a7-aaf4-1f2919ed4e92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-757a-bc1c-b79d5a6c7814" xlink:to="loc_us-gaap_SegmentDomain_019ce3d2-0f72-76a7-aaf4-1f2919ed4e92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilitiesSegmentMember_019ce3d2-0f72-7eb5-9a8f-6cd18a1c17de" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilitiesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019ce3d2-0f72-76a7-aaf4-1f2919ed4e92" xlink:to="loc_sgry_SurgicalFacilitiesSegmentMember_019ce3d2-0f72-7eb5-9a8f-6cd18a1c17de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019ce3d2-0f72-7428-8148-d415fe94af07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7816-a385-88825a898a9f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019ce3d2-0f72-7428-8148-d415fe94af07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7816-a385-88825a898a9f" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019ce3d2-0f72-7f8f-9031-87f063a9f1bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019ce3d2-0f72-7f8f-9031-87f063a9f1bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SuppliesExpense_019ce3d2-0f72-7c9e-8fe9-04cd9533b76a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SuppliesExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:to="loc_us-gaap_SuppliesExpense_019ce3d2-0f72-7c9e-8fe9-04cd9533b76a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019ce3d2-0f72-7c3c-b0e1-9165d656ba08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:to="loc_us-gaap_ProfessionalFees_019ce3d2-0f72-7c3c-b0e1-9165d656ba08" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_OperatingAndFinanceLeaseExpense_019ce3d2-0f72-7023-91f8-6a24aacf9009" xlink:href="sgry-20260331.xsd#sgry_OperatingAndFinanceLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:to="loc_sgry_OperatingAndFinanceLeaseExpense_019ce3d2-0f72-7023-91f8-6a24aacf9009" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019ce3d2-0f72-7533-b5dc-62defc8e3225" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019ce3d2-0f72-7533-b5dc-62defc8e3225" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019ce3d2-0f72-7e4d-9879-771610d0c7aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ce3d2-0f72-7518-b524-7f1134856171" xlink:to="loc_us-gaap_OperatingExpenses_019ce3d2-0f72-7e4d-9879-771610d0c7aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_AdjustedSurgicalFacilitiesEarningsBeforeInterestTaxDepreciationAndAmortization_019ce3d2-0f72-7439-8db0-952872f21326" xlink:href="sgry-20260331.xsd#sgry_AdjustedSurgicalFacilitiesEarningsBeforeInterestTaxDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7816-a385-88825a898a9f" xlink:to="loc_sgry_AdjustedSurgicalFacilitiesEarningsBeforeInterestTaxDepreciationAndAmortization_019ce3d2-0f72-7439-8db0-952872f21326" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7816-a385-88825a898a9f" xlink:to="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019ce3d2-0f72-7062-8ced-9cf15b498994" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019ce3d2-0f72-7062-8ced-9cf15b498994" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_UnallocatedExpensesAbstract_019ce3d2-0f72-7ff2-b8a6-e2ef7b90f6c0" xlink:href="sgry-20260331.xsd#sgry_UnallocatedExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:to="loc_sgry_UnallocatedExpensesAbstract_019ce3d2-0f72-7ff2-b8a6-e2ef7b90f6c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019ce3d2-0f72-7a1f-b741-67512c0e0d87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_UnallocatedExpensesAbstract_019ce3d2-0f72-7ff2-b8a6-e2ef7b90f6c0" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019ce3d2-0f72-7a1f-b741-67512c0e0d87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_019ce3d2-0f72-78c3-8e31-42b5faa9e84d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_UnallocatedExpensesAbstract_019ce3d2-0f72-7ff2-b8a6-e2ef7b90f6c0" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_019ce3d2-0f72-78c3-8e31-42b5faa9e84d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_019ce3d2-0f72-7548-bbf6-4ab37e45778c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sgry_UnallocatedExpensesAbstract_019ce3d2-0f72-7ff2-b8a6-e2ef7b90f6c0" xlink:to="loc_us-gaap_OtherExpenses_019ce3d2-0f72-7548-bbf6-4ab37e45778c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019ce3d2-0f72-72ac-8676-c4f8d88b1c12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019ce3d2-0f72-72ac-8676-c4f8d88b1c12" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019ce3d2-0f72-7de8-800e-cbbaefb24f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019ce3d2-0f72-7de8-800e-cbbaefb24f2d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_019ce3d2-0f72-7f0d-86bd-5c4340f53dc8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019ce3d2-0f72-773b-b738-337562625ebd" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_019ce3d2-0f72-7f0d-86bd-5c4340f53dc8" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.surgerypartners.com/role/SegmentReportingScheduleofDepreciationandAmortizationAssetsandCashPurchasesofPropertyandEquipmentbyOperatingSegmentDetails" xlink:type="simple" xlink:href="sgry-20260331.xsd#SegmentReportingScheduleofDepreciationandAmortizationAssetsandCashPurchasesofPropertyandEquipmentbyOperatingSegmentDetails"/>
  <link:definitionLink xlink:role="http://www.surgerypartners.com/role/SegmentReportingScheduleofDepreciationandAmortizationAssetsandCashPurchasesofPropertyandEquipmentbyOperatingSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7280-aaad-d137b55a474c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7599-806b-3c7caadad180" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7280-aaad-d137b55a474c" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7599-806b-3c7caadad180" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019ce3d2-0f72-7b4c-84af-60cb1af765e0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7599-806b-3c7caadad180" xlink:to="loc_srt_ConsolidationItemsAxis_019ce3d2-0f72-7b4c-84af-60cb1af765e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019ce3d2-0f72-7b4c-84af-60cb1af765e0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019ce3d2-0f72-7b4c-84af-60cb1af765e0" xlink:to="loc_srt_ConsolidationItemsDomain_019ce3d2-0f72-7b4c-84af-60cb1af765e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019ce3d2-0f72-7930-b908-66d76667bad6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019ce3d2-0f72-7b4c-84af-60cb1af765e0" xlink:to="loc_srt_ConsolidationItemsDomain_019ce3d2-0f72-7930-b908-66d76667bad6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019ce3d2-0f72-7d30-9fcc-2793672d342b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019ce3d2-0f72-7930-b908-66d76667bad6" xlink:to="loc_us-gaap_OperatingSegmentsMember_019ce3d2-0f72-7d30-9fcc-2793672d342b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019ce3d2-0f72-7d11-a35a-bf34d23f75e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019ce3d2-0f72-7930-b908-66d76667bad6" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019ce3d2-0f72-7d11-a35a-bf34d23f75e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-7561-b383-aa52597ccb82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ce3d2-0f72-7599-806b-3c7caadad180" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-7561-b383-aa52597ccb82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019ce3d2-0f72-7561-b383-aa52597ccb82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-7561-b383-aa52597ccb82" xlink:to="loc_us-gaap_SegmentDomain_019ce3d2-0f72-7561-b383-aa52597ccb82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019ce3d2-0f72-734b-bebc-afe678c132ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019ce3d2-0f72-7561-b383-aa52597ccb82" xlink:to="loc_us-gaap_SegmentDomain_019ce3d2-0f72-734b-bebc-afe678c132ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sgry_SurgicalFacilitiesSegmentMember_019ce3d2-0f72-7713-b7b7-b3be79f683c9" xlink:href="sgry-20260331.xsd#sgry_SurgicalFacilitiesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019ce3d2-0f72-734b-bebc-afe678c132ed" xlink:to="loc_sgry_SurgicalFacilitiesSegmentMember_019ce3d2-0f72-7713-b7b7-b3be79f683c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019ce3d2-0f72-7b0b-8bab-a0d837c9ffa0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7280-aaad-d137b55a474c" xlink:to="loc_us-gaap_DepreciationAndAmortization_019ce3d2-0f72-7b0b-8bab-a0d837c9ffa0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019ce3d2-0f72-7bd1-acad-9a5414dd4be1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7280-aaad-d137b55a474c" xlink:to="loc_us-gaap_Assets_019ce3d2-0f72-7bd1-acad-9a5414dd4be1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019ce3d2-0f72-7fdb-93c8-add9d60e0d64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ce3d2-0f72-7280-aaad-d137b55a474c" xlink:to="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019ce3d2-0f72-7fdb-93c8-add9d60e0d64" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="101"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:type="arc" order="41"/>
  </link:definitionLink>
</link:linkbase>
