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        <PersonNm>MARY NEWELL MD</PersonNm>
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        <PersonNm>MICHAEL YUNES MD</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 4b Supplemental nonqualified retirement plan</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AMERICAN BOARD OF RADIOLOGY MAINTAINS A SECTION 457(F) PLAN. BRENT WAGNER, MD PARTICIPATES IN THE 457(F) PLAN, BUT DID NOT RECEIVE ANY PAYMENTS FROM THE PLAN DURING THE TAX YEAR. CONTRIBUTIONS TO THE PLAN TOTALING $10,500 WERE MADE DURING THE YEAR AND ARE REFLECTED IN HIS DEFERRED COMPENSATION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 1a Delegate broad authority to a committee</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PRESIDENT AND PRESIDENT ELECT HAVE AUTHORITY TO MAKE DECISIONS OUTSIDE OF REGULAR BOARD MEETINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b Review of form 990 by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 WAS PREPARED BY AN INDEPENDENT ACCOUNTING FIRM FOLLOWING THE COMPLETION OF AN AUDIT OF FINANCIAL STATEMENTS. AN ELECTRONIC COPY OF THE FORM 990 IS PROVIDED TO THE AUDIT COMMITTEE and BOARD OF GOVERNORS FOR REVIEW PRIOR TO FILING WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c Conflict of interest policy</FormAndLineReferenceDesc>
        <ExplanationTxt>POTENTIAL CONFLICTS ARE REVIEWED ANNUALLY AT A MEETING OF THE BOARD OF GOVERNORS. IF A CONFLICT IS FOUND TO EXIST, THE CONFLICTED MEMBER RECUSES THEMSELVES FROM RELATED DISCUSSIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15a Process to establish compensation of top management official</FormAndLineReferenceDesc>
        <ExplanationTxt>SPECIFIC SOURCES PROVIDING COMPARABILITY DATA FOR SALARY RANGES RELATED TO POSITIONS ARE USED FOR DIRECTOR POSITIONS AND KEY EMPLOYEES. THE INDEPENDENT BOARD APPROVES ALL EXECUTIVE LEVEL COMPENSATION UPON RECOMMENDATION OF THE COMPENSATION COMMITTEE, WHICH IS DOCUMENTED IN THE BOARD MINUTES. THE PROCESS IS CONDUCTED ANNUALLY USING THE MOST RECENT COMPARABILITY DATA. HR KNOW, LLC., CONDUCTED A LIMITED COMPENSATION SURVEY, FOR IT POSITIONS AND DIRECTORS, IN FALL 2021. AN ADDITIONAL LIMITED SURVEY CONDUCTED BY HR KNOW, LLC., FOR THE EXECUTIVE DIRECTOR AND OTHER POSITIONS NOT REVIEWED IN 2021 WAS COMPLETED MID-2022. IN 2023 HRKNOW, LLC., CONDUCTED A SURVEY FOR THE EXECUTIVE DIRECTOR ONLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15b Process to establish compensation of other employees</FormAndLineReferenceDesc>
        <ExplanationTxt>SPECIFIC SOURCES PROVIDING COMPARABILITY DATA FOR SALARY RANGES RELATED TO POSITIONS ARE USED FOR DIRECTOR POSITIONS AND KEY EMPLOYEES. THE BOARD APPROVES ALL EXECUTIVE LEVEL COMPENSATION UPON RECOMMENDATION OF THE COMPENSATION COMMITTEE, WHICH IS DOCUMENTED IN THE BOARD MINUTES. THE PROCESS IS CONDUCTED ANNUALLY USING THE MOST RECENT COMPARABILITY DATA. HR KNOW, LLC., CONDUCTED A LIMITED COMPENSATION SURVEY, FOR IT POSITIONS AND DIRECTORS, IN FALL 2021. AN ADDITIONAL LIMITED SURVEY CONDUCTED BY HR KNOW, LLC., FOR THE EXECUTIVE DIRECTOR AND OTHER POSITIONS NOT REVIEWED IN 2021 WAS COMPLETED MID-2022.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19 Required documents available to the public</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990, CONFLICT OF INTEREST POLICY, BYLAWS AND ANNUAL SUMMARY FINANCIAL STATEMENTS ARE AVAILABLE ON THE ORGANIZATION'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 2f Other Program Service Revenue</FormAndLineReferenceDesc>
        <ExplanationTxt>Miscellaneous Revenue - Total Revenue: 146865, Related or Exempt Function Revenue: 146865, Unrelated Business Revenue: , Revenue Excluded from Tax Under Sections 512, 513, or 514: ;</ExplanationTxt>
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          <BusinessNameLine1Txt>AMERICAN BOARD OF RADIOLOGY INT LLC</BusinessNameLine1Txt>
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          <AddressLine1Txt>5441 E WILLIAM CIRCLE</AddressLine1Txt>
          <CityNm>TUCSON</CityNm>
          <StateAbbreviationCd>AZ</StateAbbreviationCd>
          <ZIPCd>85711</ZIPCd>
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