﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2025v4.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-04-28T14:52:47-04:00</ReturnTs>
    <TaxPeriodEndDt>2025-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>232213999</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>HAMILTON &amp; MUSSER PC CPAS</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>176 CUMBERLAND PARKWAY</AddressLine1Txt>
        <CityNm>MECHANICSBURG</CityNm>
        <StateAbbreviationCd>PA</StateAbbreviationCd>
        <ZIPCd>17055</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2025-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>236256351</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>DAUPHIN COUNTY MEDICAL SOCIETY</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>DAUP</BusinessNameControlTxt>
      <PhoneNum>7175805225</PhoneNum>
      <USAddress>
        <AddressLine1Txt>400 WINDING CREEK BLVD</AddressLine1Txt>
        <CityNm>MECHANICSBURG</CityNm>
        <StateAbbreviationCd>PA</StateAbbreviationCd>
        <ZIPCd>17050</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>ANDREW LUTZKANIN III MD</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>7175587870</PhoneNum>
      <SignatureDt>2026-04-20</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>MATTHEW G HAAR CPA MST</PreparerPersonNm>
      <PTIN>P02047932</PTIN>
      <PhoneNum>7176973888</PhoneNum>
      <PreparationDt>2026-04-20</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2025</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="RetDoc1" referenceDocumentId="RetDoc3">
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>WWW.DAUPHINCMS.ORG</WebsiteAddressTxt>
      <Organization501cInd organization501cTypeTxt="6">X</Organization501cInd>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>90675</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ProgramServiceRevenueAmt>50</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>56218</MembershipDuesAmt>
      <InvestmentIncomeAmt>4407</InvestmentIncomeAmt>
      <SaleOfAssetsGrossAmt>30000</SaleOfAssetsGrossAmt>
      <CostOrOtherBasisExpenseSaleAmt>25390</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>4610</GainOrLossFromSaleOfAssetsAmt>
      <TotalRevenueAmt>65285</TotalRevenueAmt>
      <SalariesOtherCompEmplBnftAmt>52000</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>7008</FeesAndOtherPymtToIndCntrctAmt>
      <PrintingPublicationsPostageAmt>100</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>13436</OtherExpensesTotalAmt>
      <TotalExpensesAmt>72544</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-7259</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>127278</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>9151</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>129170</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>30146</BOYAmt>
        <EOYAmt>38875</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>143945</BOYAmt>
        <EOYAmt>131602</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>174091</BOYAmt>
        <EOYAmt>170477</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>46813</BOYAmt>
        <EOYAmt>41307</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>127278</BOYAmt>
        <EOYAmt>129170</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>THE DAUPHIN COUNTY MEDICAL SOCIETY (SOCIETY) WAS FORMED IN 1866. THE SOCIETY, ALONG WITH OTHER COUNTY MEDICAL SOCIETIES, SUPPORTS THE PENNSYLVANIA MEDICAL SOCIETY AND THE AMERICAN MEDICAL ASSOCIATION. THE SOCIETY'S MISSION INCLUDES: UPHOLDING THE ETHICS AND DIGNITY OF THE MEDICAL PROFESSION, ELEVATING AND MAINTAINING THE HIGHEST STANDARDS OF HEALTHCARE, PROMOTION AND DISSEMINATING MEDICAL INFORMATION TO MEMBERS AS WELL AS THE PUBLIC, AND PROMOTING COLLEGIAL RELATIONS AMONG ITS MEMBERS.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>EDUCATING MEMBERS DAUPHIN COUNTY MEDICAL SOCIETY (DCMS) PRODUCES A QUARTERLY MAGAZINE, CENTRAL PA MEDICINE, TO KEEP MEMBERS AND THE GENERAL PUBLIC INFORMED ON CURRENT MEDICAL TOPICS ON THE NATIONAL, STATE AND LOCAL LEVELS. CENTRAL PA MEDICINE PROVIDES A FORUM TO WELCOME NEW MEMBERS, DISCUSS MEDICAL TOPICS AND ISSUES AND NEW PROCEDURES OF INTEREST, AND INFORM THE READERSHIP OF THE PROJECTS AND PROGRAMS UNDERTAKEN BY DCMS AND DCMS ALLIANCE. DCMS ALSO USES E-NEWSLETTERS AND EMAIL BLASTS TO ADVISE ITS MEMBERS OF NEWS, UPCOMING EVENTS AND CALLS TO ACTION. DCMS MAINTAINS A WEBSITE WHICH PROVIDES RESOURCES FOR MEMBERS AND THE GENERAL PUBLIC.</DescriptionProgramSrvcAccomTxt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>EDUCATING THE PUBLIC</DescriptionProgramSrvcAccomTxt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>SCHOLARSHIPS THE SCOTT A. GUNDER MD DAUPHIN COUNTY MEDICAL SOCIETY PRESIDENTIAL SCHOLARSHIP WAS ESTABLISHED IN HONOR OF SCOTT GUNDER, MD WHO PASSED AWAY DURING HIS TERM AS DCMS PRESIDENT. MEMBERS OF THE GUNDER SCHOLARSHIP COMMITTEE REVIEW APPLICATIONS FROM DESERVING MEDICAL STUDENTS AT PENN STATE COLLEGE OF MEDICINE.</DescriptionProgramSrvcAccomTxt>
      </ProgramSrvcAccomplishmentGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ANDREW LUTZKANIN III MD</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOSEPH F ANSWINE MD</PersonNm>
        <TitleTxt>VICE PRESIDE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>EVERETT C HILLS MD</PersonNm>
        <TitleTxt>SEC'Y/TREASU</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JAAN E SIDOROV MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>MUKUL PARIKH MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>MICHAEL D BOSAK MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ANDREW J RICHARDS MD FACS FASCRS</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ANDREW R WALKER MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>SAKETRAM KOMANDURI MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN C MANTIONE MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>VIRGINIA E HALL MD FACOG FACP</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN FORNEY MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>WILLIAM WENNER MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ROBERT ETTLINGER MD</PersonNm>
        <TitleTxt>MEMBER-AT-LA</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>GERARD P EGAN</PersonNm>
        <TitleTxt>EXECUTIVE DI</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>15.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>49000</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd referenceDocumentId="RetDoc2">true</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>ANNETTE WEAVER</PersonNm>
        <USAddress>
          <AddressLine1Txt>400 WINDING CREEK BLVD</AddressLine1Txt>
          <CityNm>MECHANICSBURG</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>17050</ZIPCd>
        </USAddress>
        <PhoneNum>7175587750</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd referenceDocumentId="RetDoc2">false</PoliticalCampaignActyInd>
    </IRS990EZ>
    <IRS990ScheduleC documentId="RetDoc2">
      <SubstantiallyAllDuesNondedInd>false</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>true</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>false</AgreeCarryoverPriorYearInd>
    </IRS990ScheduleC>
    <IRS990ScheduleO documentId="RetDoc3">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENSES TELEPHONE 395 WEBSITE/COMPUTER SUPPORT 11,916 TRAVEL 329 INSURANCE 559 SERVICE CHARGES 110 DUES AND SUBSCRIPTIONS 127 TOTAL 13,436</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 20</FormAndLineReferenceDesc>
        <ExplanationTxt>UNREALIZED GAIN ON INVESTMENTS 9,151</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART II, LINE 24</FormAndLineReferenceDesc>
        <ExplanationTxt>INVESTMENTS 143,945 131,602 TOTAL 143,945 131,602</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART II, LINE 26</FormAndLineReferenceDesc>
        <ExplanationTxt>ACCOUNTS PAYABLE AND ACCRUED EXPENSES 1,295 6,324 DEFERRED REVENUE 45,518 34,983</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART III</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DAUPHIN COUNTY MEDICAL SOCIETY (SOCIETY) WAS FORMED IN 1866. THE SOCIETY, ALONG WITH OTHER COUNTY MEDICAL SOCIETIES, SUPPORTS THE PENNSYLVANIA MEDICAL SOCIETY AND THE AMERICAN MEDICAL ASSOCIATION. THE SOCIETY'S MISSION INCLUDES: UPHOLDING THE ETHICS AND DIGNITY OF THE MEDICAL PROFESSION, ELEVATING AND MAINTAINING THE HIGHEST STANDARDS OF HEALTHCARE, PROMOTION AND DISSEMINATING MEDICAL INFORMATION TO MEMBERS AS WELL AS THE PUBLIC, AND PROMOTING COLLEGIAL RELATIONS AMONG ITS MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART III, LINE 28</FormAndLineReferenceDesc>
        <ExplanationTxt>EDUCATING MEMBERS DAUPHIN COUNTY MEDICAL SOCIETY (DCMS) PRODUCES A QUARTERLY MAGAZINE, CENTRAL PA MEDICINE, TO KEEP MEMBERS AND THE GENERAL PUBLIC INFORMED ON CURRENT MEDICAL TOPICS ON THE NATIONAL, STATE AND LOCAL LEVELS. CENTRAL PA MEDICINE PROVIDES A FORUM TO WELCOME NEW MEMBERS, DISCUSS MEDICAL TOPICS AND ISSUES AND NEW PROCEDURES OF INTEREST, AND INFORM THE READERSHIP OF THE PROJECTS AND PROGRAMS UNDERTAKEN BY DCMS AND DCMS ALLIANCE. DCMS ALSO USES E-NEWSLETTERS AND EMAIL BLASTS TO ADVISE ITS MEMBERS OF NEWS, UPCOMING EVENTS AND CALLS TO ACTION. DCMS MAINTAINS A WEBSITE WHICH PROVIDES RESOURCES FOR MEMBERS AND THE GENERAL PUBLIC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART III, LINE 30</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHOLARSHIPS THE SCOTT A. GUNDER MD DAUPHIN COUNTY MEDICAL SOCIETY PRESIDENTIAL SCHOLARSHIP WAS ESTABLISHED IN HONOR OF SCOTT GUNDER, MD WHO PASSED AWAY DURING HIS TERM AS DCMS PRESIDENT. MEMBERS OF THE GUNDER SCHOLARSHIP COMMITTEE REVIEW APPLICATIONS FROM DESERVING MEDICAL STUDENTS AT PENN STATE COLLEGE OF MEDICINE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART V</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION DID NOT, DURING THE YEAR, RECEIVE ANY FUNDS, DIRECTLY, OR INDIRECTLY, TO PAY PREMIUMS ON A PERSONAL BENEFIT CONTRACT. THE ORGANIZATION, DID NOT, DURING THE YEAR, PAY ANY PREMIUMS, DIRECTLY, OR INDIRECTLY, ON A PERSONAL BENEFIT CONTRACT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART VI</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY HAS A MANAGEMENT SERVICE AGREEMENT WITH GPE MANAGEMENT SERVICES, IN WHICH GPE MANAGEMENT SERVICES PROVIDES ADMINISTRATIVE SERVICES TO THE SOCIETY, WHICH INCLUDES MEMBERSHIP/ADMINISTRATION COORDINATION, BOARD AND COMMITTEE SUPPORT, MARKETING AND COMMUNICATIONS, MEETING COORDINATION, TECHNOLOGY MANAGEMENT, AND FINANCIAL MANAGEMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>