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        <ExplanationTxt>THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST WAS CREATED BY THE UNIVERSITY OF CHICAGO, INSTITUTIONAL TRUSTEE OF THE TRUST. THE TRUST DOES NOT HAVE A SEPARATE GOVERNING BODY.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12a PART VI, LINE 12</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST DOES NOT HAVE OFFICERS OR INDIVIDUAL TRUSTEES. THE UNIVERSITY OF CHICAGO, THE SOLE INSTITUTIONAL TRUSTEE OF THE TRUST, HAS A WRITTEN CONFLICT OF INTEREST POLICY AND THE OFFICERS AND TRUSTEES OF THE UNIVERSITY ARE REQUIRED TO COMPLETE CONFLICT OF INTEREST QUESTIONNAIRES, WHICH INCLUDED ALL RELATED ORGANIZATIONS INCLUDING THE RETIREE MEDICAL TRUST.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Line 13 PART VI, LINE 13</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST DOES NOT HAVE ANY EMPLOYEES. THE UNIVERSITY OF CHICAGO, THE INSTITUTIONAL TRUSTEE, HAS A WRITTEN WHISTLEBLOWER POLICY.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Line 14 PART VI, LINE 14</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST DOES NOT HAVE A WRITTEN DOCUMENT RETENTION POLICY. THE UNIVERSITY OF CHICAGO, THE INSTITUTIONAL TRUSTEE OF THE RETIREE MEDICAL TRUST, DOES HAVE A WRITTEN DOCUMENT RETENTION POLICY.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15 PART VI, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE NO EMPLOYEES OF THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST. THE UNIVERSITY OF CHICAGO IS THE INSTITUTIONAL TRUSTEE. THE UNIVERSITY OF CHICAGO DOES HAVE A PROCESS TO REVIEW AND APPROVE THE COMPENSATION OF OFFICERS AND KEY EMPLOYEES OF THE UNIVERSITY.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 8a Documentation of meetings held by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST IS A TRUST FOR THE REIMBURSEMENT OF MEDICAL EXPENSES INCURRED BY RETIRED FORMER EMPLOYEES. THE TRUST DOES NOT HAVE MEETINGS, NOR ITS OWN GOVERNING BOARD. THE UNIVERSITY OF CHICAGO IS THE SOLE INSTITUTIONAL TRUSTEE. THE UNIVERSITY OF CHICAGO HAS A GOVERNING BODY AND HAS DOCUMENTED MEETINGS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 8b Documentation of meetings held by committees of governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO IS THE SOLE INSTITUTIONAL TRUSTEE. THE UNIVERSITY OF CHICAGO HAS DOCUMENTED COMMITTEE MEETINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b Review of form 990 by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>PRIOR TO THE FILING OF THE FORM 990, A COPY OF THE TAX RETURN WAS PROVIDED TO THE VICE PRESIDENT AND CFO OF THE UNIVERSITY OF CHICAGO AND TO THE VICE PRESIDENT AND GENERAL COUNSEL OF THE UNIVERSITY OF CHICAGO. THE UNIVERSITY OF CHICAGO IS THE SOLE INSTITUTIONAL TRUSTEE OF THE RETIREE MEDICAL TRUST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19 Required documents available to the public</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST'S GOVERNING DOCUMENTS WOULD BE AVAILABLE UPON REQUEST AT THE UNIVERSITY OF CHICAGO. THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST DOES NOT HAVE AUDITED FINANCIAL STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
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        <EIN>571239010</EIN>
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      <IdRelatedTaxExemptOrgGrp>
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          <BusinessNameLine1Txt>UCM COMMUNITY HEALTH &amp; HOSPITAL DIVISION INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>208 SOUTH LASALLE STREET</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60604</ZIPCd>
        </USAddress>
        <EIN>363181170</EIN>
        <PrimaryActivitiesTxt>PROMOTE HEALTHY COMMUNITIES &amp; HEALTHCARE SERVICES</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Type II</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIV OF CHICAGO MEDICAL CENTER</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>UCM CARE NETWORK MEDICAL GROUP INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>5841 S Maryland Ave</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60637</ZIPCd>
        </USAddress>
        <EIN>474221241</EIN>
        <PrimaryActivitiesTxt>HEALTHCARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>University of Chicago Medicine Care Network LLC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>SOUTH EAST CHICAGO COMMISSION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1511 East 53rd Street</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60615</ZIPCd>
        </USAddress>
        <EIN>362226282</EIN>
        <PrimaryActivitiesTxt>ECONOMIC DEVELOPMENT</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIV OF CHICAGO</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>UCHICAGO (BEIJING) CONSULTING COMPANY LTD CHINA</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <PrimaryActivitiesTxt>CONSULTING</PrimaryActivitiesTxt>
        <LegalDomicileForeignCountryCd>CH</LegalDomicileForeignCountryCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIVERSITY OF CHICAGO</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>UCHICAGO CENTER IN INDIA PRIVATE LIMITED</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <PrimaryActivitiesTxt>CONSULTING</PrimaryActivitiesTxt>
        <LegalDomicileForeignCountryCd>IN</LegalDomicileForeignCountryCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIVERSITY OF CHICAGO</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>SC CURRICULUM INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>70 WEST MADISON ST</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60603</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>SCIENCE CURRICULUM</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIVERSITY OF CHICAGO</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>PHOENIX OVERLAY FUND LTD</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>401 N MICHIGAN AVENUE</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60611</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>INVESTING</PrimaryActivitiesTxt>
        <LegalDomicileForeignCountryCd>CJ</LegalDomicileForeignCountryCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIVERSITY OF CHICAGO</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>UCHICAGO MEDICINE NORTHWEST INDIANA INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>5841 S MARYLAND AVE</AddressLine1Txt>
          <CityNm>Chicago</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60637</ZIPCd>
        </USAddress>
        <EIN>922355855</EIN>
        <PrimaryActivitiesTxt>Healthcare</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IN</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>UNIVERSITY OF CHICAGO MEDICAL CENTER</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>false</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>false</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>false</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>false</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>false</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>false</ReimbursementPaidByOtherOrgInd>
      <TransferFromOtherOrgInd>true</TransferFromOtherOrgInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule R, Part I SCHEDULE R, PART I</FormAndLineReferenceDesc>
        <ExplanationTxt>THE UNIVERSITY OF CHICAGO, A 501(C)(3) ORGANIZATION, IS THE DIRECT CONTROLLING ORGANIZATION AND INSTITUTIONAL TRUSTEE OF THE UNIVERSITY OF CHICAGO RETIREE MEDICAL TRUST. FOR PURPOSES OF completeness, THE FOLLOWING INFORMATION IS PROVIDED: THE RELATED ORGANIZATIONS LISTED BELOW ARE DISREGARDED ENTITIES OF THE UNIVERSITY OF CHICAGO: UCHICAGO ARGONNE LLC -68-0628477; 5801 S. ELLIS AVENUE, CHICAGO, IL 60637 PRIMARY ACTIVITY: MANAGE LAB; LEGAL DOMICILE: ILLINOIS UNIVERSITY OF CHICAGO FOUNDATION LTD - 98-0525557; 5TH FL ALDER CASTLE, 10 NOBLE, LONDON, UNITED KINGDOM PRIMARY ACTIVITY: FUNDRAISING; LEGAL DOMICILE: UNITED KINGDOM THEORY AND COMPUTING SCIENCES BUILDING TRUST - 51-6596577; 5801 S. ELLIS AVENUE, CHICAGO, IL 60637 PRIMARY ACTIVITY: RESEARCH BUILDING; LEGAL DOMICILE: ILLINOIS UCHICAGO TRADING - 30-0517735, 5801 S. ELLIS AVENUE, CHICAGO, IL 60637 PRIMARY ACTIVITY: INVESTING; LEGAL DOMICILE: ILLINOIS UCHICAGO IMPACT LLC - 61-1682394; 1307 E. 60TH STREET, CHICAGO, IL 60637 PRIMARY ACTIVITY: EDUCATION; LEGAL DOMICILE: ILLINOIS Harper Court Holdings, LLC - 5801 S. ELLIS AVENUE, CHICAGO, IL 60637 PRIMARY ACTIVITY: HOLDING COMPANY: LEGAL DOMICILE: ILLINOIS LPA MANAGEMENT LLC - 5801 S. ELLIS AVENUE, CHICAGO, IL 60637 PRIMARY ACTIVITY: PROPERTY MANAGEMENT: LEGAL DOMICILE: ILLINOIS 6014 Cottage Grove LPA Holdings LLC - 5801 S. Ellis Avenue, Chicago, IL 60637 Primary Activity: Property Holding Company Legal Domicile: Illinois Center for Research in Security Prices LLC - 105 West Adams Street, Suite 1700, Chicago, Illinois 60603 Primary Activity: Securities Research and Data Legal Domicile: Illinois Harper Court Holdings 2, LLC - 5801 S. Ellis Avenue, Chicago, IL 60637 Primary Activity: Holding Company Legal Domicile: Illinois FOR PURPOSES OF COMPLETENESS, PLEASE NOTE THE FOLLOWING: THE ENTITIES LISTED BELOW ARE DISREGARDED ENTITIES OF THE UNIVERSITY OF CHICAGO MEDICAL CENTER: UCMC COMMUNITY PHYSICIANS LLC, 5841 S. MARYLAND AVE., CHICAGO, IL 60637 EIN: 38-3865637; PRIMARY ACTIVITY: PHYSICIAN SERVICES; LEGAL DOMICILE: ILLINOIS UNIVERSITY OF CHICAGO MEDICINE CARE NETWORK LLC, 5841 S. MARYLAND AVE., CHICAGO, IL 60637 EIN: 47-4222269; PRIMARY ACTIVITY: HEALTHCARE; LEGAL DOMICILE: ILLINOIS UCM GLOBAL LLC, 5841 S. MARYLAND AVE., CHICAGO, IL 60637 EIN: 32-0579811; PRIMARY ACTIVITY: INTERNATIONAL MEDICAL CONSULTING; LEGAL DOMICILE: ILLINOIS UCMC On-Campus Mammography Services, LLC f/k/a UCMC-Solis On-Campus Mammography Services, LLC and UCMC Off-Campus Mammography Services, LLC f/k/a UCMC-Solis Off-Campus Mammography Services, LLC were related organizations for a short transition period (March 31, 2023-June 30, 2023) before they were dissolved. ALSO NOTE: THE UNIVERSITY OF CHICAGO MEDICAL CENTER IS A LESS THAN 50% MEMBER IN A JOINT VENTURE WITH UCMC/SCH ONCOLOGY JV LLC, A TAX EXEMPT ENTITY, 1850 SILVER CROSS BLVD, NEW LENOX, IL 60451, EIN: 32-2436795 AND THE UNIVERSITY OF CHICAGO MEDICINE CARE NETWORK, LLC, A DISREGARDED ENTITY OF THE UNIVERSITY OF CHICAGO MEDICAL CENTER, IS THE SOLE MEMBER OF THE FOLLOWING RELATED ENTITIES: UCM CARE NETWORK MEDICAL GROUP INC. 5841 S. MARYLAND AVE., CHICAGO, IL 60637 EIN: 47-4221241; PRIMARY ACTIVITY: HEALTHCARE; LEGAL DOMICILE: ILLINOIS UNIVERSITY OF CHICAGO MEDICINE CARE NETWORK AFFILIATED PHYSICIANS LLC, 5841 S. MARYLAND, CHICAGO, IL 60637, EIN: 47-4233918; PRIMARY ACTIVITY: HEALTHCARE; LEGAL DOMICILE: ILLINOIS THE FOLLOWING ENTITY IS A DISREGARDED ENTITY OF UCHICAGO RESEARCH INTERNATIONAL, A RELATED ENTITY: UCHICAGO RESEARCH BANGLADESH LLC, 5801 S. ELLIS AVENUE, CHICAGO, IL 60637 PRIMARY ACTIVITY: SUPPORT RESEARCH; LEGAL DOMICILE: ILLINOIS</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>
