﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2023v6.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-03-05T15:17:27-06:00</ReturnTs>
    <TaxPeriodEndDt>2024-06-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>731185089</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>ARLEDGE &amp; ASSOCIATES PC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>7100 N CLASSEN BLVD STE 200</AddressLine1Txt>
        <CityNm>OKLAHOMA CITY</CityNm>
        <StateAbbreviationCd>OK</StateAbbreviationCd>
        <ZIPCd>73116</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-07-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>731392619</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>OKLAHOMA SOCIETY OF CLINICAL ONCOLOGY I</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>OKLA</BusinessNameControlTxt>
      <PhoneNum>4058508334</PhoneNum>
      <USAddress>
        <AddressLine1Txt>PO BOX 720024</AddressLine1Txt>
        <CityNm>OKLAHOMA CITY</CityNm>
        <StateAbbreviationCd>OK</StateAbbreviationCd>
        <ZIPCd>73172</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JOSE EUGENIO NAJERA MD</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>4058508334</PhoneNum>
      <SignatureDt>2025-02-07</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>1</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>JENNIFER LINDSTROM</PreparerPersonNm>
      <PTIN>P02083973</PTIN>
      <PhoneNum>4053480615</PhoneNum>
      <PreparationDt>2025-02-07</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990 documentId="RetDoc1038000001" referenceDocumentId="RetDoc1044400001">
      <PrincipalOfficerNm>JOSE EUGENIO NAJERA MD</PrincipalOfficerNm>
      <USAddress>
        <AddressLine1Txt>PO BOX 720024</AddressLine1Txt>
        <CityNm>OKLAHOMA CITY</CityNm>
        <StateAbbreviationCd>OK</StateAbbreviationCd>
        <ZIPCd>73172</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>213584</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>0</GroupReturnForAffiliatesInd>
      <Organization501cInd organization501cTypeTxt="6">X</Organization501cInd>
      <WebsiteAddressTxt>WWW.OSCOOK.ORG</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>1985</FormationYr>
      <LegalDomicileStateCd>OK</LegalDomicileStateCd>
      <ActivityOrMissionDesc>TO IMPROVE SERVICES, PROMOTE EDUCATION, AND ADVANCE THE SCIENCES IN THE FIELD OF HEMATOLOGY AND ONCOLOGY AND ITS SUBSPECIALTIES.</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>7</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>7</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <TotalVolunteersCnt>7</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <NetUnrelatedBusTxblIncmAmt>0</NetUnrelatedBusTxblIncmAmt>
      <PYContributionsGrantsAmt>128500</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>139000</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>55234</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>24550</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>-5610</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>14212</CYInvestmentIncomeAmt>
      <PYOtherRevenueAmt>0</PYOtherRevenueAmt>
      <CYOtherRevenueAmt>0</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>178124</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>177762</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>0</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>4000</CYGrantsAndSimilarPaidAmt>
      <PYBenefitsPaidToMembersAmt>0</PYBenefitsPaidToMembersAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>62000</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>49667</CYSalariesCompEmpBnftPaidAmt>
      <PYTotalProfFndrsngExpnsAmt>0</PYTotalProfFndrsngExpnsAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>0</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>81444</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>133799</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>143444</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>187466</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>34680</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>-9704</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>554719</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>557971</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>0</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>554719</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>557971</NetAssetsOrFundBalancesEOYAmt>
      <MissionDesc>ADVANCE THE SCIENCES OF HEMATOLOGY AND ONCOLOGY AND ITS SUBSPECIALTIES AND IMPROVE SERVICES TO THE PUBLIC BY STUDYING THE SOCIOECONOMIC ASPECTS OF THE PRACTICES OF ITS MEMBERS.</MissionDesc>
      <SignificantNewProgramSrvcInd>0</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>0</SignificantChangeInd>
      <ExpenseAmt>123850</ExpenseAmt>
      <RevenueAmt>24550</RevenueAmt>
      <Desc>ON OCTOBER 2023, OSCO HELD AN IN-PERSON CONFERENCE, ENTITLED BEST OF ASCO. THIS SEMINAR FOCUSED ON THE FOREMOST RESEARCH AND STRATEGIES IN ONCOLOGY THAT WERE PRESENTED AT THE 2023 AMERICAN SOCIETY OF CLINICAL ONCOLOGY (ASCO) ANNUAL MEETING. ON APRIL 6, 2024, OSCO HELD AN IN-PERSON SABCS CONFERENCE WITH TOPICS FROM THE "BEST OF SAN ANTONIO BREAST CANCER SYMPOSIUM" WHICH WAS HELD IN DECEMBER 2023. THE SEMINAR PROVIDED THE LATEST STATE-OF-THE-ART INFORMATION ON THE EXPERIMENTAL BIOLOGY, ETIOLOGY, PREVENTION, DIAGNOSIS AND THERAPY OF BREAST CANCER AND PREMALIGNANT BREAST DISEASE. THE SEMINAR WAS DIRECTED TOWARDS HEALTH CARE PROFESSIONALS INVOLVED IN BREAST CANCER IN MEDICAL, SURGICAL, GYNECOLOGIC AND RADIATION ONCOLOGY.</Desc>
      <TotalProgramServiceExpensesAmt>123850</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind>0</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd>0</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd referenceDocumentId="RetDoc1039700001">0</PoliticalCampaignActyInd>
      <SubjectToProxyTaxInd referenceDocumentId="RetDoc1039700001">1</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd>0</DonorAdvisedFundInd>
      <ConservationEasementsInd>0</ConservationEasementsInd>
      <CollectionsOfArtInd>0</CollectionsOfArtInd>
      <CreditCounselingInd>0</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd>0</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd>0</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd>0</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd>0</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd>0</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd>0</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd>0</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd>0</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd>0</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <ForeignActivitiesInd>0</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd>0</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd>0</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>0</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>0</FundraisingActivitiesInd>
      <GamingActivitiesInd>0</GamingActivitiesInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <GrantsToOrganizationsInd>0</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd>0</GrantsToIndividualsInd>
      <ScheduleJRequiredInd>0</ScheduleJRequiredInd>
      <TaxExemptBondsInd>0</TaxExemptBondsInd>
      <LoanOutstandingInd>0</LoanOutstandingInd>
      <GrantToRelatedPersonInd>0</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd>0</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd>0</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>0</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd>0</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd>0</DeductibleArtContributionInd>
      <TerminateOperationsInd>0</TerminateOperationsInd>
      <PartialLiquidationInd>0</PartialLiquidationInd>
      <DisregardedEntityInd>0</DisregardedEntityInd>
      <RelatedEntityInd>0</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <ActivitiesConductedPrtshpInd>0</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>1</ScheduleORequiredInd>
      <IRPDocumentCnt>8</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>1</BackupWthldComplianceInd>
      <EmployeeCnt>0</EmployeeCnt>
      <UnrelatedBusIncmOverLimitInd>0</UnrelatedBusIncmOverLimitInd>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>0</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>0</NondeductibleContributionsInd>
      <RcvFndsToPayPrsnlBnftCntrctInd>0</RcvFndsToPayPrsnlBnftCntrctInd>
      <PayPremiumsPrsnlBnftCntrctInd>0</PayPremiumsPrsnlBnftCntrctInd>
      <IndoorTanningServicesInd>0</IndoorTanningServicesInd>
      <SubjToTaxRmnrtnExPrchtPymtInd>0</SubjToTaxRmnrtnExPrchtPymtInd>
      <SubjectToExcsTaxNetInvstIncInd>0</SubjectToExcsTaxNetInvstIncInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>7</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>7</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>0</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>0</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>0</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>0</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>1</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>1</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>1</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>1</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>1</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>0</OfficerMailingAddressInd>
      <LocalChaptersInd>0</LocalChaptersInd>
      <Form990ProvidedToGvrnBodyInd>1</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>1</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>1</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>1</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>1</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>1</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>1</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>0</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>0</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>OK</StatesWhereCopyOfReturnIsFldCd>
      <OtherWebsiteInd>X</OtherWebsiteInd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>THE ORGANIZATION</BusinessNameLine1Txt>
        </BusinessName>
        <PhoneNum>4058508334</PhoneNum>
        <USAddress>
          <AddressLine1Txt>PO BOX 720024</AddressLine1Txt>
          <CityNm>OKLAHOMA CITY</CityNm>
          <StateAbbreviationCd>OK</StateAbbreviationCd>
          <ZIPCd>73172</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <Form990PartVIISectionAGrp>
        <PersonNm>CHRISTINA E HENSON MD</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JORDAN M MORTON MD</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>RAID ALJUMAILY MD</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SUSANNA ULAHANNAN MD</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TODD M KLIEWER MD</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOSE EUGENIO NAJERA MD</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>WILLIAM C DOOLEY MD</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KATHLEEN A MUSSON CAE</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>20.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>62000</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>62000</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>0</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>0</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>0</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <CntrctRcvdGreaterThan100KCnt>0</CntrctRcvdGreaterThan100KCnt>
      <MembershipDuesAmt>124000</MembershipDuesAmt>
      <GovernmentGrantsAmt>15000</GovernmentGrantsAmt>
      <TotalContributionsAmt>139000</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>EXHIBITOR FEES</Desc>
        <BusinessCd>621300</BusinessCd>
        <TotalRevenueColumnAmt>24550</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>24550</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>24550</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>10787</TotalRevenueColumnAmt>
        <ExclusionAmt>10787</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>39247</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>35822</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>3425</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>3425</TotalRevenueColumnAmt>
        <ExclusionAmt>3425</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>177762</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>24550</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>14212</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>4000</TotalAmt>
        <ProgramServicesAmt>4000</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>49667</TotalAmt>
        <ProgramServicesAmt>19867</ProgramServicesAmt>
        <ManagementAndGeneralAmt>29800</ManagementAndGeneralAmt>
      </CompCurrentOfcrDirectorsGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>26100</TotalAmt>
        <ManagementAndGeneralAmt>26100</ManagementAndGeneralAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>5310</TotalAmt>
        <ManagementAndGeneralAmt>5310</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>984</TotalAmt>
        <ProgramServicesAmt>984</ProgramServicesAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>4989</TotalAmt>
        <ProgramServicesAmt>4989</ProgramServicesAmt>
      </InformationTechnologyGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>71649</TotalAmt>
        <ProgramServicesAmt>71649</ProgramServicesAmt>
      </ConferencesMeetingsGrp>
      <OtherExpensesGrp>
        <Desc>CORPORATE DUES COMMISSI</Desc>
        <TotalAmt>15330</TotalAmt>
        <ProgramServicesAmt>15330</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MEALS &amp; ENTERTAINMENT</Desc>
        <TotalAmt>4737</TotalAmt>
        <ProgramServicesAmt>4737</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>BANK SERVICE CHARGES</Desc>
        <TotalAmt>1676</TotalAmt>
        <ManagementAndGeneralAmt>1676</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>PRINTING</Desc>
        <TotalAmt>1167</TotalAmt>
        <ProgramServicesAmt>1167</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>1857</TotalAmt>
        <ProgramServicesAmt>1127</ProgramServicesAmt>
        <ManagementAndGeneralAmt>730</ManagementAndGeneralAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>187466</TotalAmt>
        <ProgramServicesAmt>123850</ProgramServicesAmt>
        <ManagementAndGeneralAmt>63616</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>115511</BOYAmt>
        <EOYAmt>91594</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>137054</BOYAmt>
        <EOYAmt>103242</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>302154</BOYAmt>
        <EOYAmt>363135</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <TotalAssetsGrp>
        <BOYAmt>554719</BOYAmt>
        <EOYAmt>557971</EOYAmt>
      </TotalAssetsGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
      <CapStkTrPrinCurrentFundsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </CapStkTrPrinCurrentFundsGrp>
      <PdInCapSrplsLandBldgEqpFundGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </PdInCapSrplsLandBldgEqpFundGrp>
      <RtnEarnEndowmentIncmOthFndsGrp>
        <BOYAmt>554719</BOYAmt>
        <EOYAmt>557971</EOYAmt>
      </RtnEarnEndowmentIncmOthFndsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>554719</BOYAmt>
        <EOYAmt>557971</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>554719</BOYAmt>
        <EOYAmt>557971</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-9704</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>12956</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>0</FSAuditedInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="RetDoc1039700001">
      <SubstantiallyAllDuesNondedInd>0</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>1</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>0</AgreeCarryoverPriorYearInd>
    </IRS990ScheduleC>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE SEVERAL TYPES OF MEMBERSHIP TYPES DEFINED WITHIN THE OSCO BYLAWS. THE CATEGORIES ARE AS FOLLOWS: ACTIVE, EMERITUS, AFFILIATE, AND HONORARY. ACTIVE INCLUDES THOSE WHOSE PRACTICE IS LIMITED TO ONCOLOGY OR HEMATOLOGY SUBSPECIALTIES. MEMBERSHIP APPLICATIONS ARE REVIEWED BY THE OSCO BOARD REGARDING QUALIFICATIONS AND SUBSEQUENTLY APPROVED IF ALL MEMBERSHIP REQUIREMENTS HAVE BEEN MET. EMERITUS APPLIES FOR THOSE PHYSICIANS THAT ARE RETIRED. EMERITUS NOMINEES MUST BE SUBMITTED BY THE BOARD SUBJECT TO A VOTE OF THE GENERAL MEMBERSHIP AT THE ANNUAL CONFERENCE AND APPROVED BY A 2/3 MAJORITY VOTE. AFFILIATE MEMBERSHIP IS FOR ALL NON-PHYSICIAN ALLIED HEALTH PERSONNEL AND HONORARY MEMBERSHIP PERTAINS TO INDIVIDUALS WHO HAVE MADE OUTSTANDING CONTRIBUTIONS TO CLINICAL ONCOLOGY. AFFILIATE AND HONORARY MEMBERS MAY NOT HOLD OFFICE OR VOTE BUT ARE APPROVED BY THE OSCO BOARD FOR MEMBERSHIP. A MEMBERSHIP APPLICATION IS POSTED ON THE OSCO WEBSITE AT OSCOOK.ORG FOR ALL THESE MEMBERSHIP CATEGORIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>PER THE OSCO BYLAWS, SECTION 3.3, THE BOARD OF DIRECTORS SHALL BE ELECTED AT THE ANNUAL BUSINESS MEETING OF THE MEMBERS OF THE SOCIETY, CALLED FOR THAT PURPOSE WHERE A QUORUM OF MEMBERS IS PRESENT. THERE SHALL BE OPEN NOMINATIONS, WHICH MAY BE SUBMITTED IN PERSON OR THROUGH MAIL BALLOTS PRIOR TO THE ANNUAL MEETING. FOLLOWING NOMINATIONS, DIRECTORS SHALL BE ELECTED THROUGH WRITTEN BALLOT BY A MAJORITY OF THE MEMBERS PRESENT AND VOTING AT THE ANNUAL MEETING. ALL ELECTED DIRECTORS SHALL SERVE A TWO-YEAR TERM, WITH A SECOND TERM POSSIBLE FOR A TOTAL OF FOUR (4) YEARS. TO OBTAIN A SECOND TERM, AN EXISTING DIRECTOR MUST SUBMIT TO THE NOMINATION PROCESS AGAIN. THE BOARD'S INITIAL MEMBERS SHALL BE ELECTED TO SERVE STAGGERED TERMS OF THREE (3) YEARS, TWO (2) YEARS AND ONE (1) YEAR SO THAT THE ENTIRE BOARD IS NEVER UP FOR RE-ELECTION IN ANY GIVEN YEAR. THE BOARD SHALL THEN ELECT ITS OFFICERS IN ACCORDANCE WITH ARTICLE 5.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>PER OSCO BYLAWS, ARTICLE 6.3, AN ANNUAL BUSINESS MEETING OF THE MEMBERS FOR THE PURPOSE OF ELECTING DIRECTORS AND FOR THE TRANSACTION OF SUCH OTHER BUSINESS AS MAY COME BEFORE THE MEETING SHALL BE HELD IN SEPTEMBER OF EACH YEAR ON A DATE DETERMINED BY THE BOARD OF DIRECTORS, UNLESS THE BOARD OF DIRECTORS, NOT LESS THAN TEN (10) DAYS PRIOR TO THE FIRST DAY OF SEPTEMBER, DESIGNATES ANOTHER DATE FOR SUCH ANNUAL BUSINESS MEETING, IN WHICH EVENT THE ANNUAL BUSINESS MEETING OF MEMBERS FOR THAT YEAR SHALL BE HELD ON THE DATE SO DESIGNATED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE OSCO BOARD OF DIRECTORS WILL BE THE SENT THE 990 ONCE IT IS PREPARED FOR THEIR REVIEW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>AT EACH MEETING OF THE BOARD, THE PRESIDENT REMINDS THE BOARD OF THE POLICY AND ASKS THAT MEMBERS ANNOUNCE IF THEY HAVE A CONFLICT OF INTEREST REGARDING ANY OF THE AGENDA ITEMS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS HAS BEEN INVOLVED IN THE SELECTION OF THE EXECUTIVE DIRECTOR. COMPENSATION IS REVIEWED ANNUALLY AS COMPARED TO OTHER EXECUTIVES IN STATES AFFILIATED WITH THE AMERICAN SOCIETY OF CLINICAL ONCOLOGY (ASCO). THE BOARD ALSO REVIEWS COMPENSATION PAID BY OTHER SIMILAR MEDICAL SPECIALTY SOCIETIES IN OKLAHOMA. THE OSCO EXECUTIVE COMMITTEE REVIEWS PERFORMANCE AND MAY APPROVE INCREASES IN COMPENSATION WITHIN THE PROPOSED BUDGET APPROVED BY THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>OSCO POLICIES ARE AVAILABLE UPON REQUEST. FORM 990 IS AVAILABLE ON THE IRS WEBSITE AND GUIDESTAR.ORG.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>OSCO POLICIES ARE AVAILABLE UPON REQUEST. FORM 990 IS AVAILABLE ON THE IRS WEBSITE AND GUIDESTAR.ORG.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>