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        <ProgramServices>14830</ProgramServices>
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        <Description>Recruiting</Description>
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        <ProgramServices>13330</ProgramServices>
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        <ProgramServices>37785</ProgramServices>
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        <EOY>8150000</EOY>
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        <EOY>3753666</EOY>
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        <EOY>20844910</EOY>
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        <EOY>8996300</EOY>
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        <EOY>8996300</EOY>
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      <MethodOfAccountingAccrual>X</MethodOfAccountingAccrual>
      <AccountantCompileOrReview>0</AccountantCompileOrReview>
      <FSAudited>1</FSAudited>
      <AuditCommittee>1</AuditCommittee>
      <FinancialStatementSeparate>X</FinancialStatementSeparate>
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          <State>RESTRICTED</State>
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        <AggregateContributions>RESTRICTED</AggregateContributions>
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        <BookValue>1575354</BookValue>
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      <TotalExpenses>18504819</TotalExpenses>
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        <ReturnReference>Description of Uncertain Tax Positions Under FIN 48:</ReturnReference>
        <Explanation>line 2: not applicable. The current audited financial statements do not include a footnote regarding any uncertain tax positions.</Explanation>
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        <Explanation>Schedule I, Part I, Line 2: All grants are provided to 501(c)(3) public charities for general support. Midwest Proton Radiotherpahy Institute, LLC does not monitor the use of these funds by these public charities.</Explanation>
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          <BusinessNameLine1>Dr Allan Thornton</BusinessNameLine1>
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      <Form990ScheduleJPartII>
        <NameBusiness>
          <BusinessNameLine1>Chris Allgower</BusinessNameLine1>
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      <Form990ScheduleJPartIII>
        <ReturnReference>Part I, Line 4a</ReturnReference>
        <Explanation>Severance payment: Clinic Operations Directors $89,036.</Explanation>
      </Form990ScheduleJPartIII>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <OtherNonCashContributionsTable>
        <NonCashCheckbox>X</NonCashCheckbox>
        <Description>InKind Contribution: Forgiveness of Accrued Int.</Description>
        <NumberOfContributions>1</NumberOfContributions>
        <NoncashContribsRptdF990>1624105</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>Fair Market Value</MethodOfDeterminingRevenues>
      </OtherNonCashContributionsTable>
      <AnyPropertyThatMustBeHeld>0</AnyPropertyThatMustBeHeld>
      <ReviewProcessUnusualNCGifts>0</ReviewProcessUnusualNCGifts>
      <ThirdPartiesUsed>0</ThirdPartiesUsed>
      <Form990ScheduleMPartII>
        <Identifier>Method for Determining Number of Contributors:</Identifier>
        <ReturnReference>Part I, Column (b):</ReturnReference>
        <Explanation>InKind Contribution: Forgiveness of accrued interest for fiscal year 2010 on accounts payable to Indiana University not payable within one year. The inkind contribution is estimated using the most current available interest rate and recorded as a revenue and expense on the audited financial statements.</Explanation>
      </Form990ScheduleMPartII>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section A, line 6</Identifier>
        <Explanation>The organization is organized as a domestic limited liability company with two corporate members and a board of managers.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section A, line 7a</Identifier>
        <Explanation>The corporate members Indiana University Research and Technology Corporation and Clarian Health Partners each select two board managers and unanimously vote on one "elected" manager to the governing board of managers.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section B, line 11</Identifier>
        <Explanation>The process of reviewing the Form 990 entails a detailed review of the Form 990 by MPRI's CFO and by the corporate members' tax departments. The governing body reviews and approves the Form 990 and the final Form 990 including requested schedules, as ultimately filed with the IRS, are provided electronically to each voting member of the organization's governing body prior to filing.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section B, line 12c</Identifier>
        <Explanation>The written Conflict of interest policy is regularly and consistently monitored and compliance is enforced by the director of human resources/ administration and director's team. The scope of this policy includes all members of the MPRI board of managers, all employees, and all contracted professionals. The policy is in place to prevent any potential conflicts of personal profit or gain, directly or indirectly, by reason of his or her participation with or employment by MPRI. In addition covered persons are to refrain from obtaining any list of MPRI's patients, referring physicians and vendors for personal or private solicitation purposes. A self disclosure from covered persons to MPRI leadership is required on any potential interest with vendors, patients or other matters. Any potential conflicts disclosed are reviewed and researched by compliance personnel and brought to the board of managers for review. The covered persons are to recuse from participating in any deliberation or decision on such transactions.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section B, line 15b</Identifier>
        <Explanation>The CEO and COO (top management official) of the organization have been selected by the organization's corporate members to serve as board members and management officials for the organization. These officers do not receive compensation from the organization and therefore compensation determination is not required by the organization. The process for determining the compensation of all other organization's officers and Key employees included a review and approval by the governing body. Comparison with member institutions and local providers was made during the review of the compensation. The deliberation and decision made on the compensation was contemporaneously substantiated in the minutes of the board of managers. In addition a written compensation agreement outlines all compensation arrangements.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section C, line 19</Identifier>
        <Explanation>Governing documents, conflict of interest policy, and financial statements are available to the public. Requests can be made by phone or mail.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part XI, Line 2C</Identifier>
        <ReturnReference>Oversight of the Audit</ReturnReference>
        <Explanation>The board of managers assumes responsibility for oversight of the audit of the financial statements and no processes have changed from prior year.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Schedule A, Part I, Line 3</Identifier>
        <ReturnReference>Hospital</ReturnReference>
        <Explanation>MPRI has been determined by the IRS to be a public charity under IRS code section 170(b)(1)(A)(III). Per Schedule H instructions only organizations that operate at least one facility that is, or is required to be, licensed, registered, or similarly recognized by a State as a hospital is required to complete the schedule. MPRI is a cancer treatment center and is not licensed as a hospital for the State of Indiana.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
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</Return>