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  <xs:element id="thc_FinanceLeaseRightOfUseAssetsAcquired" abstract="false" name="FinanceLeaseRightOfUseAssetsAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="thc_GoodwillRelatedToAssetsHeldForSaleAndDisposedOrDeconsolidatedFacility" abstract="false" name="GoodwillRelatedToAssetsHeldForSaleAndDisposedOrDeconsolidatedFacility" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="thc_ReceivablesFromGovernmentProgramsCurrent" abstract="false" name="ReceivablesFromGovernmentProgramsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_PhysicianAndGroupCoverageGuaranteesCurrent" abstract="false" name="PhysicianAndGroupCoverageGuaranteesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_FinancingReceivableNumberOfAnnualPayments" abstract="false" name="FinancingReceivableNumberOfAnnualPayments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="thc_FinancingReceivablePeriodicPayment" abstract="false" name="FinancingReceivablePeriodicPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_NumberOfOutpatientCentersRecordedNotUsingEquityMethod" abstract="false" name="NumberOfOutpatientCentersRecordedNotUsingEquityMethod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="thc_NumberOutPatientCentersOwnershipInterest" abstract="false" name="NumberOutPatientCentersOwnershipInterest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="thc_PercentageInvesteeResultsReflected" abstract="false" name="PercentageInvesteeResultsReflected" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="thc_NetIncomeLossAttributableToInvestee" abstract="false" name="NetIncomeLossAttributableToInvestee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_EstimatedFutureRecoveriesFromAccountsAssignedToConifer" abstract="false" name="EstimatedFutureRecoveriesFromAccountsAssignedToConifer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_NetCostReportSettlementsReceivablePayableAndValuationAllowances" abstract="false" name="NetCostReportSettlementsReceivablePayableAndValuationAllowances" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_ChangeInContractWithCustomerAssetNetCurrentRollForward" abstract="true" name="ChangeInContractWithCustomerAssetNetCurrentRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_IncreaseDecreaseInContractWithCustomerReceivable" abstract="false" name="IncreaseDecreaseInContractWithCustomerReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_ChangeInContractWithCustomerAssetNetNoncurrentRollForward" abstract="true" name="ChangeInContractWithCustomerAssetNetNoncurrentRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_ChangeInContractWithCustomerAssetNoncurrentRollForward" abstract="true" name="ChangeInContractWithCustomerAssetNoncurrentRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_ChangeInContractWithCustomerLiabilityNetCurrentRollForward" abstract="true" name="ChangeInContractWithCustomerLiabilityNetCurrentRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_ChangeInContractWithCustomerLiabilityNetNoncurrentRollForward" abstract="true" name="ChangeInContractWithCustomerLiabilityNetNoncurrentRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_SelfPayPatientsMember" abstract="true" name="SelfPayPatientsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_CharityCarePatientsMember" abstract="true" name="CharityCarePatientsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_GlobalBusinessCenterInTheRepublicOfPhilippinesMember" abstract="true" name="GlobalBusinessCenterInTheRepublicOfPhilippinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_LegalCostsRelatedToTheSaleOfCertainFacilitiesMember" abstract="true" name="LegalCostsRelatedToTheSaleOfCertainFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_SixPointOneTwoFivePercentSeniorUnsecuredNoteDue2028Member" abstract="true" name="SixPointOneTwoFivePercentSeniorUnsecuredNoteDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_SixPointEightSevenFivePercentSeniorUnsecuredNoteDue2031Member" abstract="true" name="SixPointEightSevenFivePercentSeniorUnsecuredNoteDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_SixPointZeroPercentSeniorUnsecuredNoteDue2033Member" abstract="true" name="SixPointZeroPercentSeniorUnsecuredNoteDue2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_FivePointOneTwoFivePercentSeniorSecuredFirstLienNotesDue2027Member" abstract="true" name="FivePointOneTwoFivePercentSeniorSecuredFirstLienNotesDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_FourPointSixTwoFivePercentSeniorSecuredFirstLienNotesDue2028Member" abstract="true" name="FourPointSixTwoFivePercentSeniorSecuredFirstLienNotesDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_FourPointTwoFiveZeroPercentSeniorSecuredFirstLienNotesDue2029Member" abstract="true" name="FourPointTwoFiveZeroPercentSeniorSecuredFirstLienNotesDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_FourPointThreeSevenFivePercentSeniorSecuredFirstLienNoteDue2030Member" abstract="true" name="FourPointThreeSevenFivePercentSeniorSecuredFirstLienNoteDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_SixPointOneTwoFivePercentSeniorSecuredFirstLienNoteDue2030Member" abstract="true" name="SixPointOneTwoFivePercentSeniorSecuredFirstLienNoteDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_SixPointSevenFiveZeroPercentSeniorSecuredFirstLienNoteDue2031Member" abstract="true" name="SixPointSevenFiveZeroPercentSeniorSecuredFirstLienNoteDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_FivePointFiveZeroPercentSeniorSecuredFirstLienNoteDue2032Member" abstract="true" name="FivePointFiveZeroPercentSeniorSecuredFirstLienNoteDue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_FinanceLeasesAndMortgageNotes" abstract="false" name="FinanceLeasesAndMortgageNotes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_CreditAgreementMember" abstract="true" name="CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_SeniorSecuredCreditFacilityDue2027Member" abstract="true" name="SeniorSecuredCreditFacilityDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_LetterOfCreditFacilityMember" abstract="true" name="LetterOfCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_IncomeAndRevenueCollectionGuaranteeMember" abstract="true" name="IncomeAndRevenueCollectionGuaranteeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_GuaranteedInvesteesOfThirdPartiesMember" abstract="true" name="GuaranteedInvesteesOfThirdPartiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_PerformanceBasedRestrictedStockUnitMember" abstract="true" name="PerformanceBasedRestrictedStockUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_VestOverPeriodFromOneToThreeYearsMember" abstract="true" name="VestOverPeriodFromOneToThreeYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_PerformanceBasedVestingThreeYearPeriodZeroToTwoHundredFiftyPercentMember" abstract="true" name="PerformanceBasedVestingThreeYearPeriodZeroToTwoHundredFiftyPercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_VestImmediatelyMember" abstract="true" name="VestImmediatelyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_VestOverPeriodFromOneToFourYearsMember" abstract="true" name="VestOverPeriodFromOneToFourYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_AdjustmentsToAdditionalPaidInCapitalPurchaseSaleOfNoncontrollingInterests" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalPurchaseSaleOfNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_SharesIssuedAndShareBasedCompensationExpenseValueShareBasedPaymentArrangementAfterForfeiture" abstract="false" name="SharesIssuedAndShareBasedCompensationExpenseValueShareBasedPaymentArrangementAfterForfeiture" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="thc_A2024RepurchaseProgramMember" abstract="true" name="A2024RepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_ShareRepurchaseProgramAuthorizedAdditionalAmount" abstract="false" name="ShareRepurchaseProgramAuthorizedAdditionalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_ShareRepurchaseProgramMember" abstract="true" name="ShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_AcuteCareHospitalsAndRelatedOutpatientFacilitiesMember" abstract="true" name="AcuteCareHospitalsAndRelatedOutpatientFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_MedicareMember" abstract="true" name="MedicareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_HealthCarePatientServiceMedicaidMember" abstract="true" name="HealthCarePatientServiceMedicaidMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_HealthCarePatientServiceManagedCareMember" abstract="true" name="HealthCarePatientServiceManagedCareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_HealthCarePatientServiceSelfpayMember" abstract="true" name="HealthCarePatientServiceSelfpayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_HealthCarePatientServiceIndemnityAndOtherMember" abstract="true" name="HealthCarePatientServiceIndemnityAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_HealthCarePatientServiceExcludingPhysicianPracticesMember" abstract="true" name="HealthCarePatientServiceExcludingPhysicianPracticesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_OtherRevenuesMember" abstract="true" name="OtherRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_HealthCareOtherSourcesMember" abstract="true" name="HealthCareOtherSourcesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_InsuranceCoverageTable" abstract="true" name="InsuranceCoverageTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="thc_WindstormsMember" abstract="false" name="WindstormsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_CaliforniaEarthquakesAndNamedWindstormsMember" abstract="true" name="CaliforniaEarthquakesAndNamedWindstormsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_NewMadridFaultEarthquakesMember" abstract="true" name="NewMadridFaultEarthquakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_NewMadridFaultEarthquakesCaliforniaEarthquakesAndNamedWindstormsMember" abstract="true" name="NewMadridFaultEarthquakesCaliforniaEarthquakesAndNamedWindstormsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_OtherCatastrophicEventsMember" abstract="false" name="OtherCatastrophicEventsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_OtherGeographicAreasMember" abstract="true" name="OtherGeographicAreasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_InsuranceCoverageLineItems" abstract="true" name="InsuranceCoverageLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_InsurancePerOccurrenceLimit" abstract="false" name="InsurancePerOccurrenceLimit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_InsuranceAnnualLimit" abstract="false" name="InsuranceAnnualLimit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_InsuranceMinimumDeductiblePercentage" abstract="false" name="InsuranceMinimumDeductiblePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="thc_InsuranceMaximumDeductiblePerIncident" abstract="false" name="InsuranceMaximumDeductiblePerIncident" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="thc_LossContingencyAccrualOther" abstract="false" name="LossContingencyAccrualOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="thc_InterestExpenseCarryforwardUtilizationMember" abstract="true" name="InterestExpenseCarryforwardUtilizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_RealizabilityOfDeferredTaxAssetsMember" abstract="true" name="RealizabilityOfDeferredTaxAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="thc_EffectOfDilutiveSecuritiesPerShareAmount" abstract="false" name="EffectOfDilutiveSecuritiesPerShareAmount" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="thc_EstimatedFairValueOfDebtInstrumentAsPercentageOfCarryingValue" abstract="false" name="EstimatedFairValueOfDebtInstrumentAsPercentageOfCarryingValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="thc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermOperatingLeaseAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermOperatingLeaseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPreviouslyHeldInvestmentsInUnconsolidatedAffiliates" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPreviouslyHeldInvestmentsInUnconsolidatedAffiliates" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermOperatingLeaseLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_BusinessAcquisitionPurchasePriceAllocationRedeemableNoncontrollingInterestsInEquityOfConsolidatedSubsidiaries" abstract="false" name="BusinessAcquisitionPurchasePriceAllocationRedeemableNoncontrollingInterestsInEquityOfConsolidatedSubsidiaries" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_AdjustedEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract" abstract="true" name="AdjustedEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_AdjustedEarningsBeforeInterestTaxDepreciationAndAmortization" abstract="false" name="AdjustedEarningsBeforeInterestTaxDepreciationAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="thc_AdjustedSegmentEBITDAAbstract" abstract="true" name="AdjustedSegmentEBITDAAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="thc_NetGainLossOnSaleConsolidationAndDeconsolidationOfFacilities" abstract="false" name="NetGainLossOnSaleConsolidationAndDeconsolidationOfFacilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
