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  <xsd:element name="SummaryOfSignificantAccountingPoliciesTable" id="omi_SummaryOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LeasesWeightedAverageDiscountRateAbstract" id="omi_LeasesWeightedAverageDiscountRateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TriggeringEventsDomain" id="omi_TriggeringEventsDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentIssuePricePercentage" id="omi_DebtInstrumentIssuePricePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfComponentsOfAccumulatedOfOtherComprehensiveIncomeLossAssociatedWithDefinedBenefitPlanTableTableTextBlock" id="omi_ScheduleOfComponentsOfAccumulatedOfOtherComprehensiveIncomeLossAssociatedWithDefinedBenefitPlanTableTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AcquisitionRelatedExitAndRealignmentChargesMember" id="omi_AcquisitionRelatedExitAndRealignmentChargesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SharebasedPaymentArrangementNoncashExpenseContinuingOperations" id="omi_SharebasedPaymentArrangementNoncashExpenseContinuingOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityAndFinanceLeaseLiability" id="omi_RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityAndFinanceLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationOtherOperatingIncomeExpenseNet" id="omi_DisposalGroupIncludingDiscontinuedOperationOtherOperatingIncomeExpenseNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossOtherPostretirementBenefitPlansTaxExpenseBenefit" id="omi_AccumulatedOtherComprehensiveIncomeLossOtherPostretirementBenefitPlansTaxExpenseBenefit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ProceedsFromAccountsReceivableFinancingAgreement" id="omi_ProceedsFromAccountsReceivableFinancingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RepaymentsOfAccountsReceivableFinancingAgreement" id="omi_RepaymentsOfAccountsReceivableFinancingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AcquisitionRelatedChargesAndIntangibleAmortization" id="omi_AcquisitionRelatedChargesAndIntangibleAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MasterReceivablesPurchaseAgreementMember" id="omi_MasterReceivablesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UncollectedAccountsReceivablesSoldOrRemoved" id="omi_UncollectedAccountsReceivablesSoldOrRemoved" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DerivativeDecreaseInNotionalAmountIncrements" id="omi_DerivativeDecreaseInNotionalAmountIncrements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProfessionalFeesMember" id="omi_ProfessionalFeesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredTaxAssetsInsurance" id="omi_DeferredTaxAssetsInsurance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RecentlyAdoptedAndNotYetAdoptedAccountingPronouncementsPolicyTextBlock" id="omi_RecentlyAdoptedAndNotYetAdoptedAccountingPronouncementsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AcquisitionRelatedChargesAndIntangibleAmortizationPolicyPolicyTextBlock" id="omi_AcquisitionRelatedChargesAndIntangibleAmortizationPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ExitAndRealignmentChargesPolicyPolicyTextBlock" id="omi_ExitAndRealignmentChargesPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ProceedsFromCollectionOfAccountsReceivables" id="omi_ProceedsFromCollectionOfAccountsReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccountsReceivableMaximumOutstandingAmountSold" id="omi_AccountsReceivableMaximumOutstandingAmountSold" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="WarehouseFacilitiesMember" id="omi_WarehouseFacilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradeAndOtherAccountsReceivableSaleProgramPolicyPolicyTextBlock" id="omi_TradeAndOtherAccountsReceivableSaleProgramPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccountsReceivableSoldUnderProgram" id="omi_AccountsReceivableSoldUnderProgram" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockRepurchasedAndRetiredDuringPeriodAveragePricePerShare" id="omi_StockRepurchasedAndRetiredDuringPeriodAveragePricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EarnedAndUnbilledReceivables" id="omi_EarnedAndUnbilledReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="OtherFixedAssetsMember" id="omi_OtherFixedAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DiabetesProductMember" id="omi_DiabetesProductMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SleepTherapyProductMember" id="omi_SleepTherapyProductMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="HomeRespiratoryTherapyProductMember" id="omi_HomeRespiratoryTherapyProductMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CapitationAgreementsMember" id="omi_CapitationAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueFromContractWithCustomerSaleOfEquipmentAndSupplies" id="omi_RevenueFromContractWithCustomerSaleOfEquipmentAndSupplies" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueFromContractWithCustomerRentalOfEquipment" id="omi_RevenueFromContractWithCustomerRentalOfEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CostOfRevenueTableTextBlock" id="omi_CostOfRevenueTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConcentrationRiskNumberOfMajorCustomers" id="omi_ConcentrationRiskNumberOfMajorCustomers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LargestCommercialPayorsMember" id="omi_LargestCommercialPayorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LargestCommercialPayorsOneMember" id="omi_LargestCommercialPayorsOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LargestCommercialPayorsTwoMember" id="omi_LargestCommercialPayorsTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MedicareAndStateMedicaidProgramsMember" id="omi_MedicareAndStateMedicaidProgramsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConcentrationRiskNumberOfMajorSuppliers" id="omi_ConcentrationRiskNumberOfMajorSuppliers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MajorSuppliersMember" id="omi_MajorSuppliersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MajorSupplierAxis" id="omi_MajorSupplierAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MajorSupplierDomain" id="omi_MajorSupplierDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IndividualSuppliersMember" id="omi_IndividualSuppliersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationDistributionSellingAndAdministrativeExpenses" id="omi_DisposalGroupIncludingDiscontinuedOperationDistributionSellingAndAdministrativeExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationAcquisitionRelatedChargesAndIntangibleAmortization" id="omi_DisposalGroupIncludingDiscontinuedOperationAcquisitionRelatedChargesAndIntangibleAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationExitAndRealignmentChargesNet" id="omi_DisposalGroupIncludingDiscontinuedOperationExitAndRealignmentChargesNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationInterestIncomeExpenseNet" id="omi_DisposalGroupIncludingDiscontinuedOperationInterestIncomeExpenseNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationLongTermDebtCurrent" id="omi_DisposalGroupIncludingDiscontinuedOperationLongTermDebtCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationOperatingLeaseAssetsNoncurrent" id="omi_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseAssetsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationLongTermDebtNoncurrent" id="omi_DisposalGroupIncludingDiscontinuedOperationLongTermDebtNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent" id="omi_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevisionOfPriorPeriodErrorsPolicyTextBlock" id="omi_RevisionOfPriorPeriodErrorsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesCurrent" id="omi_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MergerTerminationFees" id="omi_MergerTerminationFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TransactionFinancingFeesNet" id="omi_TransactionFinancingFeesNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GoodwillImpairmentLossDiscontinuedOperations" id="omi_GoodwillImpairmentLossDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationsDeferredTaxAssetsNoncurrent" id="omi_DisposalGroupIncludingDiscontinuedOperationsDeferredTaxAssetsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ItStrategicInitiativesAndOtherMember" id="omi_ItStrategicInitiativesAndOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentOtherMember" id="omi_DebtInstrumentOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OstomyMember" id="omi_OstomyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WoundCareMember" id="omi_WoundCareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UrologyMember" id="omi_UrologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CommercialPayorsMember" id="omi_CommercialPayorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MedicareMember" id="omi_MedicareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MedicaidMember" id="omi_MedicaidMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NonCashExpensesConversionOfEquipmentFromRentalToSales" id="omi_NonCashExpensesConversionOfEquipmentFromRentalToSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockRepurchasedAndRetiredDuringPeriodExcludingFees" id="omi_StockRepurchasedAndRetiredDuringPeriodExcludingFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TransactionBreakageFee" id="omi_TransactionBreakageFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TransactionBreakageFeePolicyPolicyTextBlock" id="omi_TransactionBreakageFeePolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationsPercentageOfEquityInterestRetained" id="omi_DisposalGroupIncludingDiscontinuedOperationsPercentageOfEquityInterestRetained" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TerminationAgreementConcentrationRiskFromCustomerMember" id="omi_TerminationAgreementConcentrationRiskFromCustomerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherComprehensiveIncomeLossSaleReclassificationAdjustmentNetOfTaxPortionAttributableToParent" id="omi_OtherComprehensiveIncomeLossSaleReclassificationAdjustmentNetOfTaxPortionAttributableToParent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccountsReceivableSoldUnderProgramContinuingOperations" id="omi_AccountsReceivableSoldUnderProgramContinuingOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProceedsFromCollectionOfAccountsReceivablesContinuingOperations" id="omi_ProceedsFromCollectionOfAccountsReceivablesContinuingOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UncollectedAccountsReceivablesSoldAndRemovedContinuingOperations" id="omi_UncollectedAccountsReceivablesSoldAndRemovedContinuingOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AmendedTradeAndOtherAccountsReceivablesSaleProgramPolicyPolicyTextBlock" id="omi_AmendedTradeAndOtherAccountsReceivablesSaleProgramPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccountsReceivableSoldUnderAmendedProgram" id="omi_AccountsReceivableSoldUnderAmendedProgram" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SuppliersOneMember" id="omi_SuppliersOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SuppliersTwoMember" id="omi_SuppliersTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SuppliersThreeMember" id="omi_SuppliersThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationsEquityInterestRetainedAmount" id="omi_DisposalGroupIncludingDiscontinuedOperationsEquityInterestRetainedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationCostsAgreedToReimbursePercent" id="omi_DisposalGroupIncludingDiscontinuedOperationCostsAgreedToReimbursePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationMaximumCostsAgreedToReimburseAmount" id="omi_DisposalGroupIncludingDiscontinuedOperationMaximumCostsAgreedToReimburseAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScenarioCostsIncurredPriorToOctober12026Member" id="omi_ScenarioCostsIncurredPriorToOctober12026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScenarioCostsIncurredPriorToJanuary12027Member" id="omi_ScenarioCostsIncurredPriorToJanuary12027Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationMaximumCreditSupportAmount" id="omi_DisposalGroupIncludingDiscontinuedOperationMaximumCreditSupportAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="GainLossOnDiscontinuedOperationsMember" id="omi_GainLossOnDiscontinuedOperationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RestructuringAndRelatedCostMaximumReimbursementPayable" id="omi_RestructuringAndRelatedCostMaximumReimbursementPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ReimbursementPayableBeforeOctober12026Member" id="omi_ReimbursementPayableBeforeOctober12026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ReimbursementPayableBeforeJanuary12027Member" id="omi_ReimbursementPayableBeforeJanuary12027Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncomeTaxRateReconciliationChangesInUnrecognizedTaxBenefitsAmount" id="omi_IncomeTaxRateReconciliationChangesInUnrecognizedTaxBenefitsAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationChangesInUnrecognizedTaxBenefitsPercent" id="omi_EffectiveIncomeTaxRateReconciliationChangesInUnrecognizedTaxBenefitsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelled" id="omi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelled" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EquityAwardsPostAcquisitionProtectionPeriod" id="omi_EquityAwardsPostAcquisitionProtectionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationReversalOfExpense" id="omi_ShareBasedCompensationReversalOfExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScheduleOfIncomeTaxesPaidByJurisdictionTableTextBlock" id="omi_ScheduleOfIncomeTaxesPaidByJurisdictionTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="TaxCreditCarryforwardSubjectToExpiration" id="omi_TaxCreditCarryforwardSubjectToExpiration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DeferredInterestDeductionsCarryforwards" id="omi_DeferredInterestDeductionsCarryforwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TaxCreditCarryforwardDeductibleAgainstCapitalGains" id="omi_TaxCreditCarryforwardDeductibleAgainstCapitalGains" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationEstimatedPurchasePriceAdjustmentReceivable" id="omi_DisposalGroupIncludingDiscontinuedOperationEstimatedPurchasePriceAdjustmentReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentBeforeAdjustment" id="omi_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentBeforeAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions" id="omi_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
</xsd:schema>
