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        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The endowment funds represent assets held in trust that are available for physician recruitment whose use has been restricted by donors to a specific time period or purpose.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>Monitoring is provided by CHMC Cardiovascular Surgical Foundation, Inc. (the Foundation) through oversight of the terms and conditions of a written grant agreement. Multi-year agreements require yearly progress and financial reports for continuation of funding. During the year ended September 30, 2017, the Foundation only provided grant donations to other 501(c)(3) organizations.</ExplanationTxt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christopher W Baird MD</PersonNm>
        <TitleTxt>Director</TitleTxt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Francis Fynn-Thompson MD</PersonNm>
        <TitleTxt>Director</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <PersonNm>Jorge Salazar MD</PersonNm>
        <TitleTxt>Physician</TitleTxt>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Foundation provides gross-up payments for mortgage forgiveness, tuition payments, long-term disability insurance, and life insurance. These payments are included as taxable wages during the year. All permanent full-time employees of the Foundation are eligible for the gross-up payments.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Lines 4a-b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Foundation established the CHMC Cardiovascular Surgical 2005 Supplemental Executive Retirement Plan (the SERP), effective as of January 1, 2005, to reward licensed physician employees with a benefit based on service. The SERP's sources of contributions are from employer discretionary amounts (if any), severance benefit, and elective deferrals. The amounts are vested after five years, attainment of age 63, death, disability, or change in control. The Foundation made SERP payments to the following individual during the year ended September 30, 2017: Christopher W. Baird, MD $288,000. Part I, Line 4b: The Foundation has a deferred compensation arrangement under a nonqualified defined contribution plan to provide supplemental retirement benefits to certain employees. The Foundation made defined compensation payments to the following individuals during the year ended September 30, 2017: Pedro del Nido, MD $18,000; John E. Mayer, Jr., MD $18,000; Sitaram Emani, MD $18,000; Aditya K. Kaza, MD $18,000; Christopher W. Baird, MD $18,000; and Francis Fynn-Thompson, MD $18,000.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 7</FormAndLineReferenceDesc>
        <ExplanationTxt>Bonus compensation amounts are determined by the Chief of CHMC Cardiovascular Surgical Foundation, Inc. (the Foundation). The amounts are discretionary based on job performance and on the financial performance of the Foundation.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
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        <PersonNm>Pedro del Nido MD</PersonNm>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Sitaram M Emani MD</PersonNm>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Francis Fynn-Thompson MD</PersonNm>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>John E Mayer Jr MD</PersonNm>
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        <LoanPurposeTxt>Retention</LoanPurposeTxt>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Aditya K Kaza MD</PersonNm>
        <RelationshipWithOrgTxt>Director</RelationshipWithOrgTxt>
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      <LoansBtwnOrgInterestedPrsnGrp>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Christopher W Baird MD</PersonNm>
        <RelationshipWithOrgTxt>Director</RelationshipWithOrgTxt>
        <LoanPurposeTxt>Housing</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Jorge Salazar MD</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule L, Part II:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Foundation has provided secured forgivable loans to employees. The loans bear carrying interest rates up to 1.94%. In most cases, the Foundation forgives an amount equal to 20% of the principal value for each year of continued employment. The amount forgiven is included in the employee's W-2 during the year of forgiveness. At September 30, 2017, the balance of the loans outstanding is $1,658,400. Future principal balances due are $1,232,000 in 2018; $492,000 in 2019; $472,000 in 2020; $372,000 in 2021; and $312,000 in 2022.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 1</FormAndLineReferenceDesc>
        <ExplanationTxt>A majority of CHMC Cardiovascular Surgical Foundation, Inc.'s (the Foundation's) board members are physicians who are not independent from the Foundation. However, the Foundation is part of an integrated delivery system with Boston Children's Hospital (the Hospital) which does have a community board. The Foundation was organized in 1982. At the time, the board was composed entirely of physicians, a board structure that was approved by the Internal Revenue Service. The Foundation has since adjusted the board structure by adding the Physicians Organization at Children's Hospital, Inc. (the PO) as a member. See Schedule O, Part VI, Questions 3, 6, 7b, and 12 for more on the PO's rights.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>The Physicians Organization at Children's Hospital, Inc. (the PO) is the Class "C" member of CHMC Cardiovascular Surgical Foundation, Inc. (the Foundation). The PO is responsible for providing management services to the Foundation. The PO has the power to approve the independent auditor and legal counsel of the Foundation from a list of firms mutually agreed to by the PO and the Foundation. The PO also has the right to review, but not to approve, the annual budgets and by-law changes of the Foundation. Lastly, Boston Children's Hospital has the right to review for compliance with applicable law, the general terms of and any modification to physician compensation and benefit plans for all physician employees of the Foundation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>CHMC Cardiovascular Surgical Foundation, Inc. (the Foundation) has three classes of members. The Chief of the Department of Cardiac Surgery (the Department) of Boston Children's Hospital (the Hospital) is the sole Class "A" member. Any member of the Department (other than the Chief) who holds a professional staff appointment from Harvard Medical School, and who is geographically full-time at the Hospital shall be a Class "B" member. Other physicians' upon recommendation from the Chief and approval from the President of the Hospital may be permitted to be Class "B" members. The Physicians Organization at Children's Hospital, Inc. is the Class "C" member of the Foundation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>According to the Articles of Organization, the Class "A" member is the Chief of the Department of Cardiac Surgery (the Department) of Boston Children's Hospital (the Hospital). Any other member of the Department who holds a professional staff appointment in cardiovascular surgery at the Hospital, has a full-time faculty appointment from Harvard Medical School, and who is geographically full-time at the Hospital shall be a Class "B" member. A Class "A or "B" member shall hold membership as long as he/she remains qualified for membership. Only Class "A and "B" members may vote in annual meetings or other elections, serve on the Hospital's Board of Trustees, or nominate candidates for election to the Board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Physicians Organization at Children's Hospital, Inc. (the PO) is the Class "C" member of CHMC Cardiovascular Surgical Foundation, Inc. (the Foundation). The PO is responsible for providing management services to the Foundation. The PO has the power to approve the independent auditor and legal counsel of the Foundation from a list of firms mutually agreed to by the PO and the Foundation. The PO also has the right to review, but not to approve, the annual budgets and by-law changes of the Foundation. Lastly, Boston Children's Hospital has the right to review for compliance with applicable laws, the general terms of any modification to the physician compensation and benefit plans for all physician employees of the Foundation. As a Class "C" member of the Foundation, the PO attends the Foundation's annual meeting.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The detailed review will be conducted by the President of the Foundation, Pedro J. del Nido, MD and the Administrator, Janet Horgan. A copy of the Form 990 will be provided to the Board prior to filing. The detailed review will be conducted before filing the return with the Internal Revenue Service.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>In conjunction with Boston Children's Hospital, the Physicians Organization at Children's Hospital, Inc. (the PO) administers an annual conflict of interest disclosure process to all of its member Foundations which asks physicians (officers, top management, and highly compensated employees) and selected Foundation staff to disclose potential conflicts. A disclosure statement will be circulated annually to members of the PO. The audit committee shall determine those individuals (including medical staff members) who shall be required to complete the disclosure statement. The audit committee, at its discretion, may either: 1) refer any or all disclosure statements to the Board of Directors; 2) appoint an ad hoc committee to review and resolve any conflict of interest issues; or 3) review and resolve any conflict of interest personally or through a desingnee(s). Any person not receiving a disclosure statement has an affirmative obligation to disclose to the PO President, PO General Counsel, or his/her supervisor whenever he/she believes he/she has or may have a conflict of interest. Similarly, each person completing a disclosure statement has an affirmative obligation to update the statement any time circumstances change and/or he/she believes that a conflict of interest may exist. In the event a conflict of interest is found to exist, the Foundation prohibits the member from voting on any matter to which that conflict relates or otherwise influences the voting on such matter.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>All the physicians (top management, officers, and highly compensated individuals) fall under compensation guidelines determined by Harvard University (Harvard) with limitations established for certain positions/ranks within the medical school. Annually, compensation is reviewed and reported to Boston Children's Hospital's (the Hospital's) Board of Trustees to ensure that total direct and indirect compensation does not exceed the pre-determined guidelines of Harvard. Any new indirect benefit plan requires approval by CHMC Cardiovascular Surgical Foundation, Inc.'s (the Foundation's) Board of Directors, which then must be reviewed and permitted by the Hospital. Major procedures of the approval process involve: comparing compensation data of physicians within the comparable field of medicine; indirect compensation currently being offered; and the financial stability of the Foundation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Foundation maintains all financial records, conflict of interest policies, and governing documents at its main office at 300 Longwood Avenue, Boston, MA 02115. The documents are available upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part X, Column A:</FormAndLineReferenceDesc>
        <ExplanationTxt>The prior year column of the balance sheet on Form 990 was updated to agree to the audited financial statements. The lines that were updated are: Line 1 was updated from $3,296,102 to $1,314,442; Line 2 was updated from $2,514,000 to $6,467,360; Line 5 was updated from $0 to $2,200,000; Line 7 was updated from $2,650,952 to $450,952; Line 11 was updated from $14,120,214 to $19,102,348; Line 12 was updated from $7,522,728 to $568,894; line 17 was updated from $1,223,728 to $15,515; and Line 25 was updated from $13,968,232 to $15,176,445.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>Pension adjustment 692,843.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>The audit process and scope has not changed from the prior year.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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