Patient presents with complaints consistent with knee osteoarthritis.  Symptoms include chronic knee pain, stiffness, crepitus, and limited range of motion.  Onset of symptoms was gradual and has progressed over the past [number] monthsyears.  Pain is exacerbated by weight-bearing activities and relieved by rest.  Patient reports morning stiffness lasting approximately [duration].  Physical examination reveals tenderness to palpation along the joint line, bony swelling, and palpable crepitus with passive range of motion.  There is no evidence of effusion or instability.  McMurray's test is negative.  Radiographic imaging of the affected knee demonstrates joint space narrowing, osteophyte formation, and subchondral sclerosis, consistent with the diagnosis of knee osteoarthritis.  Differential diagnoses considered included rheumatoid arthritis, meniscus tear, and ligamentous injury.  Based on the clinical presentation and imaging findings, the diagnosis of primary osteoarthritis of the knee, Kellgren-Lawrence grade [grade], is confirmed.  Treatment plan includes conservative management with nonsteroidal anti-inflammatory drugs (NSAIDs), physical therapy focusing on range of motion and strengthening exercises, and weight management.  Patient education provided on joint protection strategies and activity modification.  Follow-up scheduled in [duration] to assess response to treatment and discuss further management options including intra-articular injections or referral to orthopedics for surgical intervention if indicated.  ICD-10 code M17.1 assigned.