With　population　aging　becoming　increasingly　prominent,　it　has　been　recognized　as　a　critical　issue　for　urban　planners　whether　older　adults　can　access　fair,　high-quality　medical　services.　Yet,　few　studies　have　investigated　urban　medical　accessibility　at　a　departmental　level　for　older　adults.　Taking　Beijing　as　a　case　study,　this　study　puts　forth　a　novel　framework　augmented　by　multisource　data　to　analyze　subdistrict-scale　accessibility　to　urban　medical　departments,　with　a　particular　emphasis　on　older　adults＇　common　diseases.　Online　registration　data　were　collected　to　indicate　the　supply　capacity　of　medical　services,　with　the　influence　of　department　reputation　taken　into　account　when　determining　the　facilities＇　service　range.　A　hierarchical　two-step　floating　catchment　area　method　was　employed　to　examine　accessibility　for　older　adults　to　the　cardiovascular,　orthopedic,　endocrinology,　respiratory,　and　neurology　departments.　Subsequently,　Gini　indices　were　calculated　to　evaluate　medical　accessibility　equity　across　urban　spaces.　Additionally,　multiple　linear　regression　was　used　to　explore　the　correlations　between　medical　accessibility　and　potential　influencing　factors.　Results　showed　that　medical　accessibility　is　typically　higher　in　downtown　areas　and　decreases　from　the　urban　center　to　the　peripheral　areas　in　Beijing.　Cardiovascular,　respiratory,　and　orthopedic　patients　face　relatively　greater　difficulty　in　accessing　appropriate　medical　resources.　Furthermore,　significant　inequity　in　medical　accessibility　was　observed　among　the　subdistricts　at　different　locations,　with　accessibility　inequity　in　the　ecological　conservation　area　being　particularly　concerning.　Additionally,　seven　factors　were　found　to　significantly　affect　accessibility,　including　distance　to　the　urban　center,　density　of　arterial　and　collector　roads,　proportion　of　residential　land　use,　proportion　of　public　service　land　use,　proportion　of　transportation　land　use,　and　proportion　of　vehicle　ownership.　The　proposed　framework　could　identify　subdistricts　with　low　accessibility　for　older　adult　patients　to　access　different　medical　departments.　Therefore,　it　could　potentially　support　the　policy-making　process　by　offering　guidelines　to　adjust　the　construction　plan　of　the　medical　system　in　metropolises　and　optimize　the　direction　for　resource　input.