Patient presents with complaints of right knee pain consistent with osteoarthritis.  Symptoms include intermittent aching, stiffness, and crepitus exacerbated by weight-bearing activities and prolonged standing.  Onset of symptoms was gradual over the past six months.  Pain is localized to the right knee joint and is described as a dull ache, with occasional sharp pains during movement.  Stiffness is most pronounced in the morning and after periods of inactivity, improving with movement and activity.  Patient denies any history of trauma, fever, or systemic symptoms.  Physical examination reveals tenderness to palpation along the medial joint line, reduced range of motion with mild crepitus on flexion and extension, and no evidence of effusion or instability.  Right knee osteoarthritis diagnosis is supported by clinical findings and patient history.  Radiographic imaging is recommended to confirm the diagnosis and assess the severity of joint degeneration.  Initial treatment plan includes conservative management with over-the-counter analgesics such as ibuprofen for pain relief, regular low-impact exercise focusing on strengthening quadriceps and improving range of motion, and weight management counseling.  Patient education provided on osteoarthritis management, including activity modification and the importance of adherence to the prescribed treatment plan.  Follow-up appointment scheduled in four weeks to reassess symptoms and discuss further management options if necessary.  Differential diagnoses considered include meniscus tear, patellofemoral pain syndrome, and inflammatory arthritis.  ICD-10 code M17.11, Right knee osteoarthritis, primary, is assigned.