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        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>Footnote Disclosure-Uncertain Tax Positions Under FIN #48 (Source: Consolidated Financial Statements-St. Luke's Health System) Income Taxes: The Health System is a not-for-profit corporation and is recognized as tax-exempt pursuant to Section 501(c)(3) of the Internal Revenue Code of 1986, as amended. The Health System accounts for uncertain tax positions in accordance with ASC Topic 740. Income tax liabilities are recorded for the impact of positions taken on income tax returns, which management believes are not more likely than not to be sustained on tax audit. Management is not aware of any uncertain tax positions that should be recorded. Unrelated Business Income: The Health System is subject to federal excise tax on its unrelated business taxable income(UBTI). As of September 30, 2017, the company had approximately $8,446 UBTI Net Operating Losses incurred from operating losses incurred from 1998 to 2017 which expire in years 2018 to 2038. The Health System does not believe that it is more likely than not they will utilize these losses prior to their expiration and as such has provided a full valuation allowance against these losses.</ExplanationTxt>
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        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>47789</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>16180</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>19296</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>662924</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Ron Jutzy MD</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>533133</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>6858</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>8230</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>14161</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>562382</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Cliff Tenley MD</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>242755</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>74103</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>25242</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>24410</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>17206</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>383716</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Bayo Crownson MD</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>267260</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>38017</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>14242</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>10615</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>17717</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>347851</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Mr Jeffrey S Taylor</PersonNm>
        <TitleTxt>SR VP/CFO/Treasurer</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>535702</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>327796</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>194145</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>12545</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>1070188</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Ms Christine Neuhoff</PersonNm>
        <TitleTxt>VP/Legal Affairs/Secretary</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>431545</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>1648</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>16180</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>16257</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>465630</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Dan S Zuckerman MD</PersonNm>
        <TitleTxt>Executive Medical Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>714735</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>11462</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>36540</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>16180</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>17525</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>796442</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Stephen A Brassell MD</PersonNm>
        <TitleTxt>Physician</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>484542</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>428441</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>36802</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>12065</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>10625</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>972475</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jonathan Swerdloff MD</PersonNm>
        <TitleTxt>Physician</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>662456</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>47830</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>36810</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>7950</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>15217</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>770263</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Gerardo M Perez MD</PersonNm>
        <TitleTxt>Physician</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>626901</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>51173</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>43242</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>20295</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>15217</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>756828</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Norman Zuckerman MD</PersonNm>
        <TitleTxt>Physician</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>617136</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>59991</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>30795</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>7950</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>6003</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>721875</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>William H Kreisle MD</PersonNm>
        <TitleTxt>Physician</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>629458</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>15216</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>44322</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>20295</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>15217</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>724508</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Mr Chris Roth</PersonNm>
        <TitleTxt>Former CEO and Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>614890</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>38131</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>16180</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>18578</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>687779</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>Compensation for the organization's CEO is determined by St. Luke's Health System, Ltd. (System), sole member of St. Luke's Regional Medical Center, Ltd. (SLRMC), which in turn is the sole member of Mountain State Tumor Institute, Inc. The System board approves the compensation amount per the recommendation of its compensation committee, and the decision is then reviewed and ratified by the board of directors for Mountain State Tumor Institute, Inc. In determining compensation for the CEO, the System board utilizes the following criteria: Compensation Committee Independent compensation consultant Compensation survey or study Approval by the board or compensation committee</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>During CY'16, the following individual participated in a supplemental non-qualified executive retirement plan: SERP SERP-Gross Up Total Jeffrey Taylor $155,638 $126,060 $281698 Maureen Okeeffe $40,230 $108,096 $148,326 During CY'16, Jeffrey S. Taylor was a participant in the supplemental non-qualified executive retirement plan. There were no additional benefits were accrued during CY'16 on behalf of the participant.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>Dan S Zuckerman MD</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Key Employee</RelationshipDescriptionTxt>
        <TransactionAmt>721875</TransactionAmt>
        <TransactionDesc>Compensation</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>St. Luke's Regional Medical Center, Ltd. is the sole member of Mountain States Tumor Institute, Inc.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>St. Luke's Regional Medical Center, Ltd. (Member) and Mountain States Tumor Institute, Inc. (Corporation), cooperatively select and employ the Chief Executive Officer of the Corporation. St. Luke's Regional Medical Center, Ltd. is the sole member of the Corporation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>St. Luke's Regional Medical Center, Ltd. (Member) maintains approval and implementation authority over Mountain State Tumor Institute, Inc. (Corporation). Actions requiring approval authority may be initiated by either the Corporation or its Member, but must be approved by both the Corporation (by action of its Board of Directors)and the Member. Actions requiring approval authority of the Member include: (a) Amendment to the Articles of Incorporation; (b) Amendment to the Bylaws of the Corporation; (c) Appointment of members of the Corporation's Board of Directors, other than ex officio directors; (d) Removal of an individual from the Corporation's Board of Directors if and when removal is requested by the Corporation's Board of Directors, which request may only be made if the Director is failing to meet the reasonable expectations for service on the Corporation's Board of Directors that are established by the Member and are uniform for the Corporation and for all of the other hospitals for which the Member then serves as the sole corporate member. (e) Approval of operating and capital budgets of the Corporation, and deviations to an approved budget over the amounts established from time to time by the Member; and (f) Approval of the strategic/tactical plans and goals and objectives of the Corporation. Implementation Authority means those actions which the Member may take without the approval or recommendation of the Corporation. This authority will not be utilized until there has been appropriate communication between the Member and the Corporation's Board of Directors and its Chief Executive Officer. Actions requiring implementation authority include: (a) Changes to the Statements of mission, philosophy, and values of the Corporation; (b) Removal of an individual from the Corporation's Board of Directors if and when the Member determines in good faith that the Director is failing to meet the Approved Board of Member Expectations. This authority to remove Directors shall not be used merely because there is a difference in business judgment between the Director and the Corporation or the Member, and shall never be used to remove one or more Directors from the Corporation's Board of Directors in order to change a decision made by the Corporation's Board of Directors; (c) Employment and termination of the Chief Executive Officer of the Corporation; (d) Appointment of the auditor for the Corporation and the coordination of the Corporation's annual audit; (e) Sales, lease, exchange, mortgage, pledge, creation of a security interest in or other disposition of real or personal property of the Corporation if such property has a fair market value in excess of a limit set from time to time by the Member and that is not otherwise contained in an Approved Budget; (f) Sale, merger, consolidation, change of membership, sale of all or substantially all of the assets of the corporation, or closure of any facility operated by the Corporation; (g) The dissolution of the Corporation; (h) Incurrence of debt by or for the Corporation in accordance with requirements established from time to time by the Member and that is not otherwise contained in an Approved Budget; and (i) Authority to establish policies to promote and develop an integrated, cohesive health care delivery system across all corporations for which the Member serves as the corporate member.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 (Form) is reviewed by an independent public accounting firm based on audited financial statements and with the assistance of the organization's finance and accounting staff. A complete copy of the Form 990 is made available to the Board of Directors prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization annually reviews the conflict of interest policy with each board member and also with new board members. Persons covered under the policy include officers, directors, senior executives, non-director members of Board committees, and others as identified by a senior executive. At all levels the board is responsible for assessing, reviewing, and resolving any conflicts of interest that have been disclosed by a covered person, or a conflict of interest disclosed by a covered person with respect to a covered person other than himself/herself. Where a conflict exists, the affected parties must recuse themselves from participating in any discussion related to the conflict.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>Executive compensation is set by St. Luke's Board of Directors and is reviewed annually. Compensation levels are based on an independent analysis of comparable pay packages offered at similar institutions across the country, with the goal of placing executives in the 50th percentile of those surveyed. These surveys are usually done every two years, with the most recent compensation survey completed during calendar year 2017. St. Luke's Health System is committed to providing the highest quality medical care to all people regardless of their ability to pay. To keep that commitment, St. Luke's puts a great deal of time and effort into recruiting and retaining the top physicians in a variety of medical fields. Our relationships with physicians range from having privileges at the hospital to full employment. For those physicians who choose to be employed, St. Luke's must offer competitive pay and benefits. Physician compensation is based on a range of criteria and can be influenced by a number of variables including: -Community need for medical specialty -Experience -Productivity -Geography -National surveys adjusted for local conditions -Willingness to serve regardless of patients' ability to pay -Duration of relationship and contractual terms -Performance on quality metrics To ensure physician compensation and benefits remain within industry standards and legal requirements for not-for-profit institutions, St. Luke's has a Physician Arrangements policy that specifies circumstances requiring a third-party valuation and also periodically uses third-party consulting firms to review St. Luke's physician compensation arrangements. Given the growing national shortage of physicians, recruiting and retaining physicians is more critical than ever to guarantee that people seeking care at St. Luke's will continue to have access to the physicians and specialists they need regardless of their insurance status or insurance provider.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization's governing documents, conflict of interest policy, and financial statements are not available to the public. Form 990, which contains financial information, is available for public inspection.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 Part VII Section A</FormAndLineReferenceDesc>
        <ExplanationTxt>Allocation of Compensation and Hours: The total hours worked and compensation reported for the following individuals represent services rendered to organizations within the St. Luke's Health System: Kathy Moore: St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. St. Luke's Clinic Coordinated Care, Ltd. Chris Roth: St. Luke's Health System, Ltd. St. Luke's Health Foundation, Ltd. St. Luke's Magic Valley Regional Medical Center, Ltd. St. Luke's Wood River Medical Center, Ltd. St. Luke's Clinic Coordinate Care, Ltd. Jeff Taylor: St. Luke's Health System, Ltd. St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. St. Luke's Magic Valley Regional Medical Center, Ltd. St. Luke's Wood River Medical Center, Ltd. St. Luke's Clinic Coordinated Care, Ltd. Christine Neuhoff: St. Luke's Health System, Ltd. St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. St. Luke's Magic Valley Regional Medical Center, Ltd. St. Luke's Wood River Medical Center, Ltd. St. Luke's Clinic Coordinated Care, Ltd. Bayo Crownson, M.D. St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. Ron Jutzy, M.D.: St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. Thomas Huntington, M.D. St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. Catherine Reynolds, M.D. St. Luke's Regional Medical Center, Ltd. Mountain States Tumor Institute, Inc. St. Luke's McCall, Ltd. In addition, Catherine Reynolds, M.D. is a member of Syringa Family Medicine, P.A., (Syringa) a physician practice that has a professional service agreement with St. Luke's Regional Medical Center, Ltd. (SLRMC). Dr. Reynolds works at least 40 hours per week on behalf of this practice for SLRMC. During CY'16, SLRMC paid Syringa $203,388 for services rendered to St. Luke's patients. Also, it should be noted that the hours reported for the directors (employed by St. Luke's) officers, key employees, and highest-paid employees are based on a minimum 40 hour work week. However, due to the demands of their roles within the St. Luke's Health System, the hours worked by these individuals often exceed the minimum required 40 hours.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 Part VII-Section B: Highest Paid Contractors</FormAndLineReferenceDesc>
        <ExplanationTxt>Dr. Charles Smith: During CY'16, Dr. Charles Smith received $115,783 in payments as a contractor to provide oncology services at the MSTI-Twin Falls location. It should be noted that although these payments were made directly to Dr. Smith and have been reported as Form 1099 compensation to him, the payments also covered the services provided by two other oncologists that also work at the MSTI-Twin Falls location.</ExplanationTxt>
      </SupplementalInformationDetail>
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  </ReturnData>
</Return>