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        <ManagementAndGeneral>653</ManagementAndGeneral>
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      <Advertising>
        <Total>6505</Total>
        <ProgramServices>1995</ProgramServices>
        <ManagementAndGeneral>4510</ManagementAndGeneral>
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      <OfficeExpenses>
        <Total>16855</Total>
        <ProgramServices>6029</ProgramServices>
        <ManagementAndGeneral>10826</ManagementAndGeneral>
      </OfficeExpenses>
      <InformationTechnology>
        <Total>62742</Total>
        <ProgramServices>34003</ProgramServices>
        <ManagementAndGeneral>28739</ManagementAndGeneral>
      </InformationTechnology>
      <Occupancy>
        <Total>46084</Total>
        <ProgramServices>10495</ProgramServices>
        <ManagementAndGeneral>35589</ManagementAndGeneral>
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      <Travel>
        <Total>17656</Total>
        <ProgramServices>15766</ProgramServices>
        <ManagementAndGeneral>1890</ManagementAndGeneral>
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      <ConferencesMeetings>
        <Total>342337</Total>
        <ProgramServices>341450</ProgramServices>
        <ManagementAndGeneral>887</ManagementAndGeneral>
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      <DepreciationDepletion>
        <Total>66725</Total>
        <ManagementAndGeneral>66725</ManagementAndGeneral>
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        <ProgramServices>9652</ProgramServices>
        <ManagementAndGeneral>29457</ManagementAndGeneral>
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      <OtherExpenses>
        <Description>PUBLISHING EXPENSES</Description>
        <Total>174996</Total>
        <ProgramServices>174996</ProgramServices>
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      <OtherExpenses>
        <Description>BOARD OF DIRECTORS EXP.</Description>
        <Total>28312</Total>
        <ProgramServices>10173</ProgramServices>
        <ManagementAndGeneral>18139</ManagementAndGeneral>
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      <OtherExpenses>
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        <ManagementAndGeneral>13671</ManagementAndGeneral>
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      <OtherExpenses>
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        <ProgramServices>1850</ProgramServices>
        <ManagementAndGeneral>5684</ManagementAndGeneral>
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      <AllOtherExpenses>
        <Total>12403</Total>
        <ProgramServices>6325</ProgramServices>
        <ManagementAndGeneral>6078</ManagementAndGeneral>
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        <Fundraising>0</Fundraising>
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        <EOY>21500</EOY>
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        <EOY>425486</EOY>
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        <EOY>12470324</EOY>
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        <CurrentTaxYear>79585</CurrentTaxYear>
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        <CurrentTaxYearMinus1Year>3309509</CurrentTaxYearMinus1Year>
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        <CurrentTaxYearMinus1Year>3360659</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>4553769</CurrentTaxYear>
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        <CurrentTaxYear>471341</CurrentTaxYear>
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        <CurrentTaxYearMinus2Years>1975</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>498</CurrentTaxYearMinus1Year>
        <Total>22887</Total>
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        <CurrentTaxYearMinus3Years>3247731</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>3379003</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>3540533</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>5025110</CurrentTaxYear>
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      <PublicSupportPercentage509>0.92500</PublicSupportPercentage509>
      <PriorYearSupportPercentage>0.91320</PriorYearSupportPercentage>
      <InvestmentIncomePercentage>0.07000</InvestmentIncomePercentage>
      <PriorYrInvestIncomePercentage>0.09000</PriorYrInvestIncomePercentage>
      <ThirtyThreePercntTestsCY509>X</ThirtyThreePercntTestsCY509>
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        <AggregateContributions>RESTRICTED</AggregateContributions>
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        <BeginningOfYearBalance>582112</BeginningOfYearBalance>
        <Contributions>50150</Contributions>
        <InvestmentEarningsOrLosses>66670</InvestmentEarningsOrLosses>
        <EndOfYearBalance>698932</EndOfYearBalance>
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        <BeginningOfYearBalance>581140</BeginningOfYearBalance>
        <Contributions>27400</Contributions>
        <InvestmentEarningsOrLosses>-26428</InvestmentEarningsOrLosses>
        <EndOfYearBalance>582112</EndOfYearBalance>
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        <BeginningOfYearBalance>492958</BeginningOfYearBalance>
        <Contributions>44550</Contributions>
        <InvestmentEarningsOrLosses>43632</InvestmentEarningsOrLosses>
        <EndOfYearBalance>581140</EndOfYearBalance>
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      <CurrentYearMinus3Years>
        <BeginningOfYearBalance>392991</BeginningOfYearBalance>
        <Contributions>28225</Contributions>
        <InvestmentEarningsOrLosses>71742</InvestmentEarningsOrLosses>
        <EndOfYearBalance>492958</EndOfYearBalance>
      </CurrentYearMinus3Years>
      <CurrentYearMinus4Years>
        <BeginningOfYearBalance>443749</BeginningOfYearBalance>
        <Contributions>91986</Contributions>
        <InvestmentEarningsOrLosses>-142744</InvestmentEarningsOrLosses>
        <EndOfYearBalance>352991</EndOfYearBalance>
      </CurrentYearMinus4Years>
      <BoardDesignatedEOYBalance>0.31000</BoardDesignatedEOYBalance>
      <PermanentEndowmentEOYBalance>0.61000</PermanentEndowmentEOYBalance>
      <TermEndowmentEOYBalance>0.08000</TermEndowmentEOYBalance>
      <EndowmentsHeldByUnrelatedOrgs>true</EndowmentsHeldByUnrelatedOrgs>
      <EndowmentsHeldByRelatedOrgs>false</EndowmentsHeldByRelatedOrgs>
      <Land>
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        <BookValue>165854</BookValue>
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      <Buildings>
        <OtherCostOrOtherBasis>1502203</OtherCostOrOtherBasis>
        <Depreciation>326425</Depreciation>
        <BookValue>1175778</BookValue>
      </Buildings>
      <Equipment>
        <OtherCostOrOtherBasis>251249</OtherCostOrOtherBasis>
        <Depreciation>199215</Depreciation>
        <BookValue>52034</BookValue>
      </Equipment>
      <TotalOfBookValueLandBuildings>1393666</TotalOfBookValueLandBuildings>
      <OtherAssets>
        <Description>BENEFICIAL INTEREST IN NET ASSETS</Description>
        <BookValue>698932</BookValue>
      </OtherAssets>
      <TotalBookValueOtherAssets>698932</TotalBookValueOtherAssets>
      <TotRevenueEtcAuditedFinclStmt>5367207</TotRevenueEtcAuditedFinclStmt>
      <NetUnrealizedGainsInvestments>436090</NetUnrealizedGainsInvestments>
      <OtherRevenues>35773</OtherRevenues>
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      <ExpensesNotRptdF990>35773</ExpensesNotRptdF990>
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      <InvestmentExpensesNotIncluded2>93993</InvestmentExpensesNotIncluded2>
      <ExpensesNotRptdOnFinStmt>93993</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>2685834</TotalExpensesPerForm990>
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        <Identifier>INTENDED USES FOR ENDOWMENT FUNDS</Identifier>
        <ReturnReference>SCHEDULE D, PAGE 2, PART V, LINE 4</ReturnReference>
        <Explanation>ENDOWMENT FUND INVESTMENT INCOME IS USED TO SUPPORT RESEARCH AND EDUCATION PROJECTS</Explanation>
      </Form990ScheduleDPartXIII>
      <Form990ScheduleDPartXIII>
        <Identifier>LIABILITY UNDER FIN 48 FOOTNOTE</Identifier>
        <ReturnReference>SCHEDULE D, PAGE 3, PART X</ReturnReference>
        <Explanation>TAX-EXEMPT STATUS: THE ASSOCIATION IS EXEMPT FROM INCOME TAX UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE. HOWEVER, INCOME FROM CERTAIN ACTIVITIES NOT DIRECTLY RELATED TO THE ASSOCIATION'S TAX EXEMPT PURPOSE IS SUBJECT TO TAXATION AS UNRELATED BUSINESS INCOME. THE ASSOCIATION FILES INFORMATION RETURNS IN THE U.S. FEDERAL AND ILLINOIS STATE JURISDICTION. THE ASSOCIATION IS NO LONGER SUBJECT TO U.S. FEDERAL AND STATE EXAMINATIONS BY TAX AUTHORITIES FOR YEARS BEFORE 2009.</Explanation>
      </Form990ScheduleDPartXIII>
      <Form990ScheduleDPartXIII>
        <Identifier>REVENUE AMOUNTS INCLUDED IN FINANCIALS - OTHER</Identifier>
        <ReturnReference>SCHEDULE D, PAGE 4, PART XI, LINE 2D</ReturnReference>
        <Explanation>RENTAL EXPENSES NETTED ON THE TAX RETURN 35,773</Explanation>
      </Form990ScheduleDPartXIII>
      <Form990ScheduleDPartXIII>
        <Identifier>EXPENSE AMOUNTS INCLUDED IN FINANCIALS - OTHER</Identifier>
        <ReturnReference>SCHEDULE D, PAGE 4, PART XII, LINE 2D</ReturnReference>
        <Explanation>RENTAL EXPENSES NETTED ON THE TAX RETURN 35,773</Explanation>
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    </IRS990ScheduleD>
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      <RecordsMaintained>true</RecordsMaintained>
      <RecipientTable>
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          <BusinessNameLine1>SPRINGER</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>233 SPRING STREET</AddressLine1>
          <City>NEW YORK</City>
          <State>NY</State>
          <ZIPCode>100131578</ZIPCode>
        </AddressUS>
        <EINOfRecipient>042509538</EINOfRecipient>
        <AmountOfCashGrant>35157</AmountOfCashGrant>
        <PurposeOfGrant>EDUCATION</PurposeOfGrant>
      </RecipientTable>
      <TotalNbrOfOtherOrganizations>1</TotalNbrOfOtherOrganizations>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>RESEARCH AWARDS</TypeOfGrant>
        <NumberOfRecipients>1</NumberOfRecipients>
        <AmountOfCashGrant>15000</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIV>
        <Identifier>PROCEDURES FOR MONITORING THE USE OF GRANT FUNDS INSIDE THE UNITED STATES</Identifier>
        <ReturnReference>SCHEDULE I, PAGE 1, PART I, LINE 2</ReturnReference>
        <Explanation>RECIPIENTS MUST MEET SPECIFIC CRITERIA TO BE ELIGIBLE FOR GRANTS FROM THE ASSOCIATION. MANUSCRIPTS DESCRIBING THE WORK ARE SUBMITTED AND GRADED BY A COMMITTEE. APPLICANTS MUST SUBMIT A FULL CURRICULUM VITAE AND A STATEMENT OF THE PRINCIPAL INVESTIGATOR'S ROLE IN THE STUDY. RECIPIENTS ARE SELECTED BASED ON THEIR WORK. THE AWARDS ARE GIVEN FOR WORK ALREADY COMPLETED. RECIPIENTS MUST NOTIFY THE ASSOCIATION OF OTHER FUNDING SOURCES. THEY MUST PRESENT THEIR WORK AT THE ASSOCIATION'S ANNUAL MEETING.</Explanation>
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      <SupplementalNonqualRetirePlan>false</SupplementalNonqualRetirePlan>
      <EquityBasedCompArrangement>false</EquityBasedCompArrangement>
      <CompBasedOnRevenueOfFilingOrg>false</CompBasedOnRevenueOfFilingOrg>
      <CompBasedOnRevenueRelatedOrgs>false</CompBasedOnRevenueRelatedOrgs>
      <CompBasedNetEarningsFilingOrg>false</CompBasedNetEarningsFilingOrg>
      <CompBasedNetEarningsRelateOrgs>false</CompBasedNetEarningsRelateOrgs>
      <AnyNonFixedPayments>false</AnyNonFixedPayments>
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        <NamePerson>RICHARD A BRAND MD</NamePerson>
        <Title>EDITOR-IN-CHIEF</Title>
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        <Identifier>ORGANIZATION'S MISSION</Identifier>
        <ReturnReference>FORM 990 - ORGANIZATION'S MISSION</ReturnReference>
        <Explanation>THE ASSOCIATION OF BONE AND JOINT SURGEONS (THE ASSOCIATION) IS A NONPROFIT CORPORATION, ORGANIZED TO EXCHANGE INFORMATION, STIMULATE DEVELOPMENT AND ADVANCEMENT OF ORTHOPAEDIC SURGERY, TRAIN LEADERS, SPONSOR AND CONTRIBUTE TO THE SCIENTIFIC ASPECTS OF, AND CLINICAL RESEARCH IN, ORTHOPAEDIC SURGERY, AND SPONSOR PUBLICATION OF THE SCIENTIFIC JOURNAL, CLINICAL ORTHOPAEDICS AND RELATED RESEARCH (CORR).</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CLASSES OF MEMBERS OR STOCKHOLDERS</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 6</ReturnReference>
        <Explanation>THE ASSOCIATION IS ORGANIZED WITH MEMBERS. THE MEMBERSHIP OF THE ASSOCIATION CONSISTS OF FOUR CLASSES OF MEMBERS: ACTIVE, SENIOR, EMERITUS, AND HONORARY.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>ELECTION OF MEMBERS AND THEIR RIGHTS</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 7A</ReturnReference>
        <Explanation>ELECTION MAY BE BY RETURN BALLOT. A THREE-QUARTERS (3/4) AFFIRMATIVE VOTE OF THE ACTIVE, SENIOR, AND EMERITUS MEMBERS, RESPONDING BY THE DEADLINE DATE SHALL BE NECESSARY FOR ELECTION TO MEMBERSHIP. A CANDIDATE THUS REJECTED MAY AGAIN BE PROPOSED FOR MEMBERSHIP AT THE END OF THREE (3) YEARS. TO FULFILL THE CRITERIA FOR MEMBERSHIP, A NEWLY ELECTED MEMBER MUST PRESENT A PAPER WITHIN TWO (2) MEETINGS FOLLOWING ELECTION TO MEMBERSHIP. THE MEMBERSHIP COMMITTEE SHALL DISTRIBUTE A SCHEDULE OF DEADLINES ON AN ANNUAL BASIS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>DECISIONS SUBJECT TO APPROVAL OF MEMBERS</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 7B</ReturnReference>
        <Explanation>ELECTION OF OFFICERS, APPROVAL OF BYLAW CHANGES , ADMISSION OF NEW MEMBERS, LOCATION OF ANNUAL CONFERENCE</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>ORGANIZATION'S PROCESS USED TO REVIEW FORM 990</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 11B</ReturnReference>
        <Explanation>AN INDEPENDENT CERTIFIED PUBLIC ACCOUNTING FIRM (CPA) PREPARES THE ASSOCIATION'S FORM 990 AND SUBMITS THE FORM TO THE ASSOCIATION'S MANAGEMENT AND TREASURER FOR REVIEW. AN ELECTRONIC COPY OF THE FORM IS ALSO PROVIDED TO ALL VOTING MEMBERS OF THE BOARD FOR REVIEW PRIOR TO FILING. THE FORM 990 IS ALSO ATTACHED TO THE ILLINOIS FORM AG-990-IL, WHICH REQUIRES THE SIGNATURE OF TWO OFFICERS. THIS PROVIDES THE OPPORTUNITY FOR A FINAL REVIEW OF THE FORM BY A SECOND OFFICER.</Explanation>
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      <GeneralExplanation>
        <Identifier>ENFORCEMENT OF CONFLICTS POLICY</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 12C</ReturnReference>
        <Explanation>THE ASSOCIATION'S MANAGEMENT SUBMITS A QUESTIONNAIRE ANNUALLY TO EACH DIRECTOR WITH THE QUESTIONS DESIGNED TO DETECT ANY VIOLATION OF THE CONFLICT OF INTEREST POLICY. MANAGEMENT THEN PREPARES A REPORT OF ITS FINDINGS AND PRESENTS IT TO THE BOARD OF DIRECTORS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>COMPENSATION PROCESS FOR TOP OFFICIAL</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 15A</ReturnReference>
        <Explanation>COMPENSATION FOR THE EXECUTIVE DIRECTOR AND KEY EMPLOYEES IS DETERMINED BY THE EXECUTIVE COMMITTEE BASED ON COMPENSATION FOR COMPARABLE POSITIONS IN MEMBERSHIP ASSOCIATIONS. COMPENSATION IS REVIEWED ANNUALLY BY THE EXECUTIVE COMMITTEE.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>COMPENSATION PROCESS FOR OFFICERS</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 15B</ReturnReference>
        <Explanation>COMPENSATION FOR THE EXECUTIVE DIRECTOR AND KEY EMPLOYEES IS DETERMINED BY THE EXECUTIVE COMMITTEE BASED ON COMPENSATION FOR COMPARABLE POSITIONS IN MEMBERSHIP ASSOCIATIONS. COMPENSATION IS REVIEWED ANNUALLY BY THE EXECUTIVE COMMITTEE.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>GOVERNING DOCUMENTS DISCLOSURE EXPLANATION</Identifier>
        <ReturnReference>FORM 990, PAGE 6, PART VI, LINE 19</ReturnReference>
        <Explanation>DOCUMENTS ARE AVAILABLE UPON REQUEST.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>RECONCILIATION OF CHANGES - OTHER</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 9</ReturnReference>
        <Explanation>RENTAL EXPENSES NETTED ON THE TAX RETURN 35,773 RENTAL EXPENSES NETTED ON THE TAX RETURN -35,773</Explanation>
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