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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e8e8b-9275-7365-9668-06eb8557b805,g:074c9893-9035-4be3-9d0d-f206ed830aef-->
<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" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.hioscar.com/role/CoverPage" xlink:type="simple" xlink:href="oscr-20260608.xsd#CoverPage"/>
  <link:presentationLink xlink:role="http://www.hioscar.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e8e8b-9275-7788-b6c7-21931340fe50" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_DocumentType_019e8e8b-9275-7788-b6c7-21931340fe50" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e8e8b-9275-7509-8ae3-17beb4b05711" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_DocumentPeriodEndDate_019e8e8b-9275-7509-8ae3-17beb4b05711" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e8e8b-9275-7f2e-9fc2-a7fca88e9d1b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityRegistrantName_019e8e8b-9275-7f2e-9fc2-a7fca88e9d1b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e8e8b-9275-7823-a2e1-4ad931f3e6f6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e8e8b-9275-7823-a2e1-4ad931f3e6f6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e8e8b-9275-7abb-8c94-656572a46dbe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityFileNumber_019e8e8b-9275-7abb-8c94-656572a46dbe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e8e8b-9275-7dd4-9707-e11e50df1192" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e8e8b-9275-7dd4-9707-e11e50df1192" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e8e8b-9275-7c4e-b3e7-e8dd59712195" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityAddressAddressLine1_019e8e8b-9275-7c4e-b3e7-e8dd59712195" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e8e8b-9275-7bdb-9ba7-bea2933e64de" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityAddressCityOrTown_019e8e8b-9275-7bdb-9ba7-bea2933e64de" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e8e8b-9275-7858-87b0-03c42bd9da34" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityAddressStateOrProvince_019e8e8b-9275-7858-87b0-03c42bd9da34" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e8e8b-9275-7997-832b-2547602d46b0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityAddressPostalZipCode_019e8e8b-9275-7997-832b-2547602d46b0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e8e8b-9275-72a8-a915-8b7b6c85f3dd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_CityAreaCode_019e8e8b-9275-72a8-a915-8b7b6c85f3dd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e8e8b-9275-7280-894a-ac748bce56cf" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_LocalPhoneNumber_019e8e8b-9275-7280-894a-ac748bce56cf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019e8e8b-9275-7f19-bd8d-55c4239cb220" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_WrittenCommunications_019e8e8b-9275-7f19-bd8d-55c4239cb220" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019e8e8b-9275-7f4d-9344-ac8044ffb823" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_SolicitingMaterial_019e8e8b-9275-7f4d-9344-ac8044ffb823" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019e8e8b-9275-718d-9a27-352daa486598" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_PreCommencementTenderOffer_019e8e8b-9275-718d-9a27-352daa486598" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019e8e8b-9275-7cfc-a135-7d70ac59816a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019e8e8b-9275-7cfc-a135-7d70ac59816a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e8e8b-9275-7de9-8fe4-dc2cde8d27c3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_Security12bTitle_019e8e8b-9275-7de9-8fe4-dc2cde8d27c3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e8e8b-9275-7871-9572-2e48d720d023" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_TradingSymbol_019e8e8b-9275-7871-9572-2e48d720d023" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e8e8b-9275-7797-bc82-93ff2f97b3f8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_SecurityExchangeName_019e8e8b-9275-7797-bc82-93ff2f97b3f8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e8e8b-9275-797f-b602-135d0a5b4094" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e8e8b-9275-797f-b602-135d0a5b4094" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e8e8b-9275-74e6-b015-3978a761cc45" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_EntityCentralIndexKey_019e8e8b-9275-74e6-b015-3978a761cc45" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e8e8b-9275-709d-b8f7-f678baa5184c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e8e8b-9275-704d-82f5-2a6637c5d912" xlink:to="loc_dei_AmendmentFlag_019e8e8b-9275-709d-b8f7-f678baa5184c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
