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    <ReturnTs>2023-04-11T07:24:27-04:00</ReturnTs>
    <TaxPeriodEndDt>2022-12-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2022-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>237046788</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>CONTRA COSTA REGIONAL MEDICAL CENTER AUXILIARY</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% Bill Cunningham</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>BILL CUNNINGHAM</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <SignatureDt>2023-04-11</SignatureDt>
    </BusinessOfficerGrp>
    <TaxYr>2022</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
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      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>28894</GrossReceiptsAmt>
      <ContributionsGiftsGrantsEtcAmt>6765</ContributionsGiftsGrantsEtcAmt>
      <InvestmentIncomeAmt>13</InvestmentIncomeAmt>
      <GrossSalesOfInventoryAmt>22116</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>11497</CostOfGoodsSoldAmt>
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      <TotalRevenueAmt>17397</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>19827</GrantsAndSimilarAmountsPaidAmt>
      <BenefitsPaidToOrForMembersAmt>219</BenefitsPaidToOrForMembersAmt>
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        <EOYAmt>86378</EOYAmt>
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      <OtherAssetsTotalDetail>
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        <EOYAmt>46055</EOYAmt>
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      <Form990TotalAssetsGrp>
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        <EOYAmt>132433</EOYAmt>
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      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>448</BOYAmt>
        <EOYAmt>566</EOYAmt>
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      <NetAssetsOrFundBalancesGrp>
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      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>THECONTRACOSTAREGIONALMEDICALCENTERAUXILIARY'SPURPOSEISTOPROVIDESERVICEANDFUNDSFORSPECIALPROJECTSWITHINTHECOUNTYHOSPITALSYSTEMTHATOTHERWISEARENOTFUNDED.WITHTHEPRIMARYEMPHASISONINFANTSANDTHEMOSTUNDERSERVEDINOURCOMMUNITY.</PrimaryExemptPurposeTxt>
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      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>IPADSWEREPURCHASEDFORTHEINFUSIONCLINIC.</DescriptionProgramSrvcAccomTxt>
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      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>FISHTANKFORTHEINTENSIVECAREUNIT.THEFISHTANKPROVIDESEMOTIONALTHERAPYTOPATIENTSANDFAMILIESATCCRMC.</DescriptionProgramSrvcAccomTxt>
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        <ProgramServiceExpensesAmt>1800</ProgramServiceExpensesAmt>
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      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>PASTORAL CARE 320 HOLIDAY DECOR 99</DescriptionProgramSrvcAccomTxt>
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      <TotalProgramServiceExpensesAmt>19827</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">BILL CUNNINGHAM</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">EILEEN DEVLIN</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">SKIP WEINSTOCK</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>4.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">BETTY HOLT</PersonNm>
        <TitleTxt>ASSISTANT TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">LINDA WAXMAN</PersonNm>
        <TitleTxt>GIFT SHOP MANAGER</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">SUSAN TUNISON</PersonNm>
        <TitleTxt>HISTORIAN</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">FLORENCE BERGHUIS</PersonNm>
        <TitleTxt>PARLIAMENTARIAN</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">PAT HARRIS</PersonNm>
        <TitleTxt>CHAIR-SUNSHINE</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">ED QUINNAN</PersonNm>
        <TitleTxt>MEMBER AT LARGE</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">RHONDA SMITH</PersonNm>
        <TitleTxt>VOLUNTEER PROGRAM COORDINATOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>40.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Marie Jimenez</PersonNm>
        <TitleTxt>CHAIR-LAYETTES</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
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      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd referenceDocumentName="IRS990ScheduleC">false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd referenceDocumentName="IRS990ScheduleN BinaryAttachment">false</OrganizationDissolvedEtcInd>
      <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>
      </BooksInCareOfDetail>
      <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>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <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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    <IRS990ScheduleA documentId="IRS990ScheduleA1" documentName="IRS990ScheduleA">
      <HospitalInd>X</HospitalInd>
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    <IRS990ScheduleO documentId="IRS990ScheduleO1" documentName="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>| Grants And Similar Amounts Paid:, Amount:| GRANTS AND SIMILAR AMOUNTS PAID: CCRMC INTENSIVE CARE UNIT. CCRMC NURSES. CCRMC SURGICAL DEPARTMENT PROGRAMS FOR CCRMC HIGH RISK AND HIGH ANXIETY PATIENTS. CCRMC NEONATAL AND PERINATAL UNITS., $19827|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>| Other Expenses:, Amount:| OTHER EXPENSES MERCHANT FEES 983 OFFICE SUPPLIES 2390, $3373|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, Amount:| OTHER CHANGES IN NET ASSETS. ADJUSTMENT TO PHYSICAL INVENTORY., $616|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, BOYAmount:, EOYAmount:| OTHER ASSETS. GIFT SHOP INVENTORY., $44452, $46055|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, line 26</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, BOYAmount:, EOYAmount:| LIABILITIES. SALES TAX PAYABLE, $448, $566|</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:| GRANTS AND SIMILIAR AMOUNTS PAID.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 35c</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:| ORGANIZATION WAS NOT SUBJECT TO SECTION 6033e NOTICE REPORTING AND PROXY TAX REQUIREMENTS DURING THE YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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