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        <Description>EDITORIAL PAYMENTS</Description>
        <BusinessCode>900099</BusinessCode>
        <TotalRevenueColumn>228623</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>228623</RelatedOrExemptFunctionIncome>
      </ProgramServiceRevenue>
      <ProgramServiceRevenue>
        <Description>SUBSCRIPTIONS</Description>
        <BusinessCode>900099</BusinessCode>
        <TotalRevenueColumn>60577</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>60577</RelatedOrExemptFunctionIncome>
      </ProgramServiceRevenue>
      <ProgramServiceRevenue>
        <Description>SALES OF SYLLABUS</Description>
        <BusinessCode>900099</BusinessCode>
        <TotalRevenueColumn>10100</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>10100</RelatedOrExemptFunctionIncome>
      </ProgramServiceRevenue>
      <TotalProgramServiceRevenue>694938</TotalProgramServiceRevenue>
      <InvestmentIncome>
        <TotalRevenueColumn>10974</TotalRevenueColumn>
        <ExclusionAmount>10974</ExclusionAmount>
      </InvestmentIncome>
      <RoyaltiesRevenue>
        <TotalRevenueColumn>337933</TotalRevenueColumn>
        <ExclusionAmount>337933</ExclusionAmount>
      </RoyaltiesRevenue>
      <TotalRevenue>
        <TotalRevenueColumn>2295879</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>623990</RelatedOrExemptFunctionIncome>
        <UnrelatedBusinessRevenue>0</UnrelatedBusinessRevenue>
        <ExclusionAmount>419855</ExclusionAmount>
      </TotalRevenue>
      <GrantsToDomesticOrgs>
        <Total>92500</Total>
        <ProgramServices>92500</ProgramServices>
      </GrantsToDomesticOrgs>
      <GrantsToDomesticIndividuals>
        <Total>24210</Total>
        <ProgramServices>24210</ProgramServices>
      </GrantsToDomesticIndividuals>
      <FeesForServicesManagement>
        <Total>500050</Total>
        <ProgramServices>435808</ProgramServices>
        <ManagementAndGeneral>64242</ManagementAndGeneral>
      </FeesForServicesManagement>
      <FeesForServicesOther>
        <Total>361980</Total>
        <ProgramServices>345623</ProgramServices>
        <ManagementAndGeneral>16357</ManagementAndGeneral>
      </FeesForServicesOther>
      <Advertising>
        <Total>22672</Total>
        <ProgramServices>22672</ProgramServices>
      </Advertising>
      <OfficeExpenses>
        <Total>50268</Total>
        <ProgramServices>43253</ProgramServices>
        <ManagementAndGeneral>7015</ManagementAndGeneral>
      </OfficeExpenses>
      <InformationTechnology>
        <Total>29538</Total>
        <ProgramServices>26872</ProgramServices>
        <ManagementAndGeneral>2666</ManagementAndGeneral>
      </InformationTechnology>
      <Travel>
        <Total>205033</Total>
        <ProgramServices>190220</ProgramServices>
        <ManagementAndGeneral>14813</ManagementAndGeneral>
      </Travel>
      <ConferencesMeetings>
        <Total>632668</Total>
        <ProgramServices>604893</ProgramServices>
        <ManagementAndGeneral>27775</ManagementAndGeneral>
      </ConferencesMeetings>
      <Insurance>
        <Total>5478</Total>
        <ProgramServices>4727</ProgramServices>
        <ManagementAndGeneral>751</ManagementAndGeneral>
      </Insurance>
      <OtherExpenses>
        <Description>JOURNAL SUBSCRIP EXP</Description>
        <Total>67942</Total>
        <ProgramServices>67942</ProgramServices>
      </OtherExpenses>
      <OtherExpenses>
        <Description>CME EXPENSES</Description>
        <Total>5546</Total>
        <ProgramServices>4944</ProgramServices>
        <ManagementAndGeneral>602</ManagementAndGeneral>
      </OtherExpenses>
      <OtherExpenses>
        <Description>PROFESSIONAL FEES</Description>
        <Total>4469</Total>
        <ManagementAndGeneral>4469</ManagementAndGeneral>
      </OtherExpenses>
      <AllOtherExpenses>
        <Total>9505</Total>
        <ProgramServices>7379</ProgramServices>
        <ManagementAndGeneral>2126</ManagementAndGeneral>
      </AllOtherExpenses>
      <TotalFunctionalExpenses>
        <Total>2011859</Total>
        <ProgramServices>1871043</ProgramServices>
        <ManagementAndGeneral>140816</ManagementAndGeneral>
        <Fundraising>0</Fundraising>
      </TotalFunctionalExpenses>
      <SavingsAndTempCashInvestments>
        <BOY>2066254</BOY>
        <EOY>2228739</EOY>
      </SavingsAndTempCashInvestments>
      <AccountsReceivable>
        <BOY>214949</BOY>
        <EOY>227796</EOY>
      </AccountsReceivable>
      <PrepaidExpensesDeferredCharges>
        <BOY>41612</BOY>
        <EOY>78783</EOY>
      </PrepaidExpensesDeferredCharges>
      <LandBuildingsEquipmentBasis>101313</LandBuildingsEquipmentBasis>
      <LandBldgEquipmentAccumDeprec>859</LandBldgEquipmentAccumDeprec>
      <LandBuildingsEquipmentBasisNet>
        <BOY>0</BOY>
        <EOY>100454</EOY>
      </LandBuildingsEquipmentBasisNet>
      <TotalAssets>
        <BOY>2322815</BOY>
        <EOY>2635772</EOY>
      </TotalAssets>
      <AccountsPayableAccruedExpenses>
        <BOY>26926</BOY>
        <EOY>48950</EOY>
      </AccountsPayableAccruedExpenses>
      <DeferredRevenue>
        <BOY>114825</BOY>
        <EOY>125996</EOY>
      </DeferredRevenue>
      <TotalLiabilities>
        <BOY>141751</BOY>
        <EOY>174946</EOY>
      </TotalLiabilities>
      <FollowSFAS117>X</FollowSFAS117>
      <UnrestrictedNetAssets>
        <BOY>936390</BOY>
        <EOY>1014921</EOY>
      </UnrestrictedNetAssets>
      <TemporarilyRestrictedNetAssets>
        <BOY>1244674</BOY>
        <EOY>1445905</EOY>
      </TemporarilyRestrictedNetAssets>
      <TotalNetAssetsFundBalances>
        <BOY>2181064</BOY>
        <EOY>2460826</EOY>
      </TotalNetAssetsFundBalances>
      <TotalLiabNetAssetsFundBalances>
        <BOY>2322815</BOY>
        <EOY>2635772</EOY>
      </TotalLiabNetAssetsFundBalances>
      <InfoInScheduleOPartXI>X</InfoInScheduleOPartXI>
      <ReconcilationRevenueExpenses>284020</ReconcilationRevenueExpenses>
      <ReconcilationOtherChanges>-4258</ReconcilationOtherChanges>
      <MethodOfAccountingAccrual>X</MethodOfAccountingAccrual>
      <AccountantCompileOrReview>0</AccountantCompileOrReview>
      <FSAudited>1</FSAudited>
      <AuditCommittee>1</AuditCommittee>
      <FinancialStatementSeparate>X</FinancialStatementSeparate>
      <FederalGrantAuditRequired>0</FederalGrantAuditRequired>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PubliclySupportedOrg170b1Avi>X</PubliclySupportedOrg170b1Avi>
      <GiftsGrantsContribReceived170>
        <CurrentTaxYearMinus4Years>2190465</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>985472</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>611859</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>1835739</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>1252034</CurrentTaxYear>
        <Total>6875569</Total>
      </GiftsGrantsContribReceived170>
      <Total170>
        <CurrentTaxYearMinus4Years>2190465</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>985472</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>611859</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>1835739</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>1252034</CurrentTaxYear>
        <Total>6875569</Total>
      </Total170>
      <AmountsSubstContributorsTotal>4786175</AmountsSubstContributorsTotal>
      <PublicSupportTotal170>2089394</PublicSupportTotal170>
      <GrossInvestmentIncome170>
        <CurrentTaxYearMinus4Years>571758</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>444165</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>328326</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>420515</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>348907</CurrentTaxYear>
        <Total>2113671</Total>
      </GrossInvestmentIncome170>
      <OtherIncome170>
        <CurrentTaxYearMinus2Years>5452</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>2533</CurrentTaxYearMinus1Year>
        <Total>7985</Total>
      </OtherIncome170>
      <TotalSupport>8997225</TotalSupport>
      <GrossReceiptsFromAdmissionsEtc>4844984</GrossReceiptsFromAdmissionsEtc>
      <PublicSupportPertcentage170>0.23220</PublicSupportPertcentage170>
      <PublicSupportPertcentPriorYear>0.38160</PublicSupportPertcentPriorYear>
      <ThirtyThreePercntTestsPY170>X</ThirtyThreePercntTestsPY170>
      <FactsAndCircumstancesTest>AHS IS PUBLICLY SUPPORTED, AS SHOWN BY THE FOLLOWING FACTS: IT HAS A REGULAR PROGRAM OF ANNUALLY SOLICITING CONTRIBUTIONS FROM ITS MEMBERS, WHO RANGE BETWEEN 1,500 AND 2,500. IT ALSO REGULARLY SOLICITS GRANTS AND SPONSORSHIPS FROM A NUMBER OF CORPORATIONS. MEMBERSHIP DUES ARE INTENTIONALLY MODEST AND HAVE NOT BEEN RAISED IN TEN YEARS IN AN EFFORT TO ATTRACT A BROAD RANGE OF NEW PHYSICIAN MEMBERS TO THE SOCIETY. THE SOCIETY'S INCOME IS USED TO PROVIDE EDUCATIONAL CONFERENCES AND PROGRAMS, AS WELL AS TO PUBLISH SCHOLARLY MEDICAL JOURNALS THAT BENEFIT THOUSANDS OF PHYSICIANS AROUND THE COUNTRY. IN ADDITION, EDUCATIONAL HEADACHE INFORMATION FOR LAYPERSONS IS AVAILABLE TO HEADACHE SUFFERERS AROUND THE WORLD THROUGH THE SOCIETY'S WEBSITE AND THROUGH THE EFFORTS OF AN EDUCATIONAL PROGRAM CALLED ACHE. AHS' BOARD OF DIRECTORS CONSISTS OF A REPRESENTATIVE BODY OF UNRELATED INDIVIDUALS FROM AROUND THE COUNTRY WHO ALL HAVE SPECIAL EXPERTISE IN THE TREATMENT OF HEADACHE AND ISSUES DIRECTLY RELATED TO THE SOCIETY'S MISSION.</FactsAndCircumstancesTest>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInfo>
        <ContributorNumber>RESTRICTED</ContributorNumber>
        <ContributorNameBusiness>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorNameBusiness>
        <ContributorAddressUS>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorAddressUS>
        <AggregateContributions>RESTRICTED</AggregateContributions>
      </ContributorInfo>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <OtherLandBuildings>
        <OtherCostOrOtherBasis>101313</OtherCostOrOtherBasis>
        <Depreciation>859</Depreciation>
        <BookValue>100454</BookValue>
      </OtherLandBuildings>
      <TotalOfBookValueLandBuildings>100454</TotalOfBookValueLandBuildings>
      <TotalRevenue>2295879</TotalRevenue>
      <TotalExpenses>2011859</TotalExpenses>
      <ExcessOrDeficitForYear>284020</ExcessOrDeficitForYear>
      <NetUnrealizedGLOnInvestments>-4258</NetUnrealizedGLOnInvestments>
      <TotalAdjustments>-4258</TotalAdjustments>
      <ExcessOrDeficitPerFS>279762</ExcessOrDeficitPerFS>
      <TotRevenueEtcAuditedFinclStmt>2291621</TotRevenueEtcAuditedFinclStmt>
      <NetUnrealizedGainsInvestments>-4258</NetUnrealizedGainsInvestments>
      <RevenueNotRptdF990>-4258</RevenueNotRptdF990>
      <RevenueSubtotal>2295879</RevenueSubtotal>
      <RevenueNotRptdOnFinStmt>0</RevenueNotRptdOnFinStmt>
      <TotalRevenuePerForm990>2295879</TotalRevenuePerForm990>
      <TotExpensesEtcAuditedFinclStmt>2011859</TotExpensesEtcAuditedFinclStmt>
      <ExpensesNotRptdF990>0</ExpensesNotRptdF990>
      <ExpensesSubtotal>2011859</ExpensesSubtotal>
      <ExpensesNotRptdOnFinStmt>0</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>2011859</TotalExpensesPerForm990>
      <Form990ScheduleDPartXIV>
        <Identifier>DESCRIPTION OF UNCERTAIN TAX POSITIONS UNDER FIN 48:</Identifier>
        <ReturnReference>PART X:</ReturnReference>
        <Explanation>UNCERTAIN TAX POSITIONS UNDER FIN 48 THE SOCIETY BELIEVES THAT IT HAD NO UNCERTAIN TAX POSITIONS UNDER FIN 48 AND, AS A RESULT, THE ADOPTION OF FIN 48 HAD NO IMPACT ON THE SOCIETY'S FINANCIAL STATEMENTS.</Explanation>
      </Form990ScheduleDPartXIV>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <RecordsMaintained>1</RecordsMaintained>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>CHILDREN'S HOSPITAL MEDICAL CENTER</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>3333 BURNET AVENUE</AddressLine1>
          <City>CINCINNATI</City>
          <State>OH</State>
          <ZIPCode>45229</ZIPCode>
        </AddressUS>
        <EINOfRecipient>310833936</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>20000</AmountOfCashGrant>
        <PurposeOfGrant>FELLOWSHIP/RESEARCH GRANT</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>FAULKNER HOSPITAL INC</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>1153 CENTRE STREET</AddressLine1>
          <City>BOSTON</City>
          <State>MA</State>
          <ZIPCode>02130</ZIPCode>
        </AddressUS>
        <EINOfRecipient>042103572</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>40000</AmountOfCashGrant>
        <PurposeOfGrant>FELLOWSHIP/RESEARCH GRANT</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>REGENTS UNIVERSITY OF CALIFORNIA LOS ANGELES</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>1920 WILSHIRE BLVD STE 620</AddressLine1>
          <City>LOS ANGELES</City>
          <State>CA</State>
          <ZIPCode>90024</ZIPCode>
        </AddressUS>
        <EINOfRecipient>956006143</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>15000</AmountOfCashGrant>
        <PurposeOfGrant>FELLOWSHIP/RESEARCH GRANT</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>MONTEFIORE MEDICAL CENTER</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>111 EAST 210TH STREET</AddressLine1>
          <City>BRONX</City>
          <State>NY</State>
          <ZIPCode>10467</ZIPCode>
        </AddressUS>
        <EINOfRecipient>131740114</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>7500</AmountOfCashGrant>
        <PurposeOfGrant>FELLOWSHIP/RESEARCH GRANT</PurposeOfGrant>
      </RecipientTable>
      <TotalNbrOf501C3AndGovtGrants>4</TotalNbrOf501C3AndGovtGrants>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>TRAVEL AWARDS</TypeOfGrant>
        <NumberOfRecipients>25</NumberOfRecipients>
        <AmountOfCashGrant>24210</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIV>
        <Identifier>PROCEDURE FOR MONITORING GRANTS IN THE U.S.:</Identifier>
        <ReturnReference>PART I, LINE 2:</ReturnReference>
        <Explanation>SCHEDULE I, PART I, LINE 2: AHS REQUIRES A SIX MONTH PROGRESS REPORT AND A FINAL REPORT FOR CLINICAL FELLOWSHIPS AND RESEARCH AWARDS.</Explanation>
      </Form990ScheduleIPartIV>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION A, LINE 3</Identifier>
        <Explanation>DELEGATION OF MANAGEMENT DUTIES TO A MANAGEMENT COMPANY THE SOCIETY OUTSOURCES ITS ADMINISTRATIVE AND MANAGEMENT FUNCTIONS TO AN INDEPENDENT MANAGEMENT SERVICE COMPANY, INCLUDING THE POSITION OF EXECUTIVE DIRECTOR (NON-VOTING MEMBER OF THE BOARD) OF THE SOCIETY. THE TOTAL COMPENSATION INCURRED BY AHS FOR THIS MANAGEMENT SERVICE COMPANY AMOUNTED TO $500,050 AND IS REPORTED ON FORM 990, PAGE 10, PART IX, LINE 11A.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION A, LINE 6</Identifier>
        <Explanation>MEMBERS OF THE ORGANIZATION THE SOCIETY HAS ONE CLASS OF VOTING MEMBERS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION A, LINE 7A</Identifier>
        <Explanation>ELECTION OF MEMBERS OF GOVERNING BODY EACH VOTING MEMBER IN GOOD STANDING SHALL HAVE ONE VOTE AT ANY MEETING OF THE MEMBERS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION B, LINE 11</Identifier>
        <Explanation>GOVERNING BODY REVIEW OF FORM 990 PRIOR TO ITS FILING WITH THE IRS, A COPY OF THE FINAL FORM 990 IS DISTRIBUTED TO EACH VOTING MEMBER OF THE GOVERNING BODY.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 12C</ReturnReference>
        <Explanation>MONITORING AND ENFORCEMENT OF CONFLICT OF INTEREST POLICY THE SOCIETY REQUIRES EACH VOTING MEMBER OF THE GOVERNING BOARD, STAFF AND FACULTY AT MEETINGS TO COMPLETE A CONFLICT OF INTEREST AND DISCLOSURE FORM. THESE FORMS ARE REVIEWED BY THE ETHICS COMMITTEE ON AN ANNUAL BASIS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>PUBLIC AVAILABILITY OF GOVERNING DOCUMENTS THE SOCIETY MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, FORM 990 AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CHANGES IN NET ASSETS OR FUND BALANCES:</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 5:</ReturnReference>
        <Explanation>NET UNREALIZED LOSSES ON INVESTMENTS: -4,258.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
  </ReturnData>
</Return>