Patient presents with complaints of right knee pain, swelling, and stiffness, consistent with right knee effusion.  Onset of symptoms reported as [duration] and attributed to [cause of effusion if known, e.g., trauma during basketball game, insidious onset].  Patient denies fever, chills, or systemic symptoms.  Physical examination reveals noticeable right knee swelling compared to the contralateral knee.  Palpation elicits tenderness along the [specify location, e.g., medial joint line, patellofemoral joint] and positive for [relevant physical exam findings, e.g., patellar tap, bulge sign].  Range of motion is restricted due to pain and swelling, measured at [degrees of flexion and extension].  Differential diagnosis includes meniscal tear, ligament injury, osteoarthritis, and inflammatory arthritis.  Plan includes right knee X-ray to evaluate for bony abnormalities, joint space narrowing, and other underlying pathology.  Depending on imaging results, further evaluation with MRI or aspiration of the right knee joint may be indicated.  Patient education provided on RICE therapy (Rest, Ice, Compression, Elevation) and NSAIDs for pain management.  Follow-up scheduled in [duration] to reassess symptoms and discuss further management options depending on imaging and response to conservative treatment.  ICD-10 code: [appropriate ICD-10 code, e.g., M25.461].