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    <ReturnTs>2025-04-24T08:42:49-04:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>237046788</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>CONTRA COSTA REGIONAL MEDICAL CENTER AUXILIARY</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% Linda Waxman</InCareOfNm>
      <BusinessNameControlTxt>CONT</BusinessNameControlTxt>
      <ForeignPhoneNum>9253705441</ForeignPhoneNum>
      <USAddress>
        <AddressLine1Txt>2500 ALHAMBRA AVE</AddressLine1Txt>
        <CityNm>MARTINEZ</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>945533156</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Susan Linnell</PersonNm>
      <PersonTitleTxt>Bookkeeper</PersonTitleTxt>
      <SignatureDt>2025-04-25</SignatureDt>
    </BusinessOfficerGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
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      <ContributionsGiftsGrantsEtcAmt>2679</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>0</MembershipDuesAmt>
      <InvestmentIncomeAmt>13</InvestmentIncomeAmt>
      <SaleOfAssetsGrossAmt>0</SaleOfAssetsGrossAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
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      <SpecialEventsDirectExpensesAmt>0</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>0</SpecialEventsNetIncomeLossAmt>
      <GrossSalesOfInventoryAmt>29730</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>18919</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>10811</GrossProfitLossSlsOfInvntryAmt>
      <OtherRevenueTotalAmt>0</OtherRevenueTotalAmt>
      <TotalRevenueAmt>13503</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>21764</GrantsAndSimilarAmountsPaidAmt>
      <BenefitsPaidToOrForMembersAmt>445</BenefitsPaidToOrForMembersAmt>
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      <PrintingPublicationsPostageAmt>0</PrintingPublicationsPostageAmt>
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      <TotalExpensesAmt>35297</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-21794</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>133052</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>-21303</OtherChangesInNetAssetsAmt>
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      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>37102</EOYAmt>
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        <BOYAmt>133616</BOYAmt>
        <EOYAmt>90591</EOYAmt>
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      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>564</BOYAmt>
        <EOYAmt>636</EOYAmt>
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        <BOYAmt>133052</BOYAmt>
        <EOYAmt>89955</EOYAmt>
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      <PrimaryExemptPurposeTxt>THE CONTRA COSTA REGIONAL MEDICAL CENTER AUXILIARYS PURPOSE IS TO PROVIDE SERVICE AND FUNDS FOR SPECIAL PROJECTS WITHIN THE COUNTY HOSPITAL SYSTEM THAT OTHERWISE ARE NOT FUNDED. WITH THE PRIMARY EMPHASIS ON INFANTS AND THE MOST UNDERSERVED IN OUR COMMUNITY.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Layette</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>16481</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Patient Care</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>2244</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Cancer $1797.00 Doula $1242.00</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>3039</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>21764</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Linda Waxman</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Eileen Devlin</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Skip Weinstock</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>4</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Betty Holt</PersonNm>
        <TitleTxt>Assistant Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Linda Waxman</PersonNm>
        <TitleTxt>Gift Shop Manager</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>35</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Susan Tunison</PersonNm>
        <TitleTxt>Historian</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Florence Berghius</PersonNm>
        <TitleTxt>Parliamentarian</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Pat Harris</PersonNm>
        <TitleTxt>Sunshine</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Ed Quinnan</PersonNm>
        <TitleTxt>Member at Large</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd referenceDocumentName="IRS990ScheduleC">false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd referenceDocumentName="IRS990ScheduleN BinaryAttachment">false</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <EngagedInExcessBenefitTransInd referenceDocumentName="IRS990ScheduleL">false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>Susan L Linnell</PersonNm>
        <USAddress>
          <AddressLine1Txt>7517 S Quinn Ct</AddressLine1Txt>
          <CityNm>Gilbert</CityNm>
          <StateAbbreviationCd>AZ</StateAbbreviationCd>
          <ZIPCd>852980058</ZIPCd>
        </USAddress>
        <PhoneNum>5105013755</PhoneNum>
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      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd referenceDocumentName="IRS990ScheduleC">false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd referenceDocumentName="IRS990ScheduleC">false</LobbyingActivitiesInd>
      <SchoolOperatingInd referenceDocumentName="IRS990ScheduleE">false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
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      <HospitalInd>X</HospitalInd>
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    <IRS990ScheduleO documentId="IRS990ScheduleO1" documentName="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>| Other Revenues:, Amount:| OTHER REVENUE, $0|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>| Grants And Similar Amounts Paid:, Amount:| CANCER: THE CANCER PROGRAM PROVIDES SUPPORT TO PATIENTS AND FAMILIES AT CCRMC., $1797| DOULA PROGRAM EXPENSE: THE DOULA PROGRAM GIVES SUPPORT TO THE PATIENTS AT CCRMC., $1242| LAYETTE: PROVIDES LAYETTES FOR NEW BABIES BORN AT CCRMC. THE VAST MAJORITY OF THIS POPULATION IS IN THE LOWEST INCOME BRACKET AND THESE LAYETTES PROVIDE A GREAT BENEFIT TO THE FAMILIES., $16481| PATIENT CARE: A FISH TANK IS MAINTAINED IN THE INTENSIVE CARE UNIT. THE FISH TANK PROVIDES EMOTIONAL THERAPY TO PATIENTS AND FAMILIES AT CCRMC., $2244|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>| Other Expenses:, Amount:| COMPUTER SOFTWARE, $3239| EQUIPMENT, $579| MERCHANT FEES, $1171| PROFESSIONAL DUES SUBSCRIPTIONS, $22| OFFICE SUPPLIES, $61|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, Amount:| ADJUSTMENT TO PHYSICAL INVENTORY, $-21303|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, BOYAmount:, EOYAmount:| OTHER ASSETS. GIFT SHOP INVENTORY, $54748, $37102|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, line 26</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, BOYAmount:, EOYAmount:| LIABILITIES: sales tax payable, $564, $636|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:| OTHER REVENUE</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:| LAYETTE: PROVIDES LAYETTES FOR NEW BABIES BORN AT CCRMC. THE VAST MAJORITY OF THIS POPULATION IS IN THE LOWEST INCOME BRACKET AND THESE LAYETTES PROVIDE A GREAT BEBEFIT TO THE FAMILIES.</ExplanationTxt>
      </SupplementalInformationDetail>
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