42-year-old female presents with 14 months of progressive right knee pain, worse with stair climbing and prolonged standing. Reports morning stiffness lasting 20 minutes and intermittent swelling. Has tried OTC NSAIDs and 6 weeks of home exercise without lasting relief. Denies locking, trauma, fever, or night pain.
Vitals: BP 122/78, HR 74, BMI 27.4. Right knee: mild effusion, medial joint line tenderness, crepitus with ROM, flexion 0–120°. Ligaments stable; McMurray negative. Antalgic gait. Radiographs (3 views): medial joint space narrowing with subchondral sclerosis and marginal osteophytes, Kellgren-Lawrence grade 3.
1. Unilateral primary osteoarthritis, right knee (M17.11) — radiographically confirmed KL grade 3, symptomatic > 12 months, failed conservative therapy.
2. Chronic right knee pain (M25.561 / G89.29).
Intra-articular corticosteroid injection of right knee performed today under sterile technique (20610-RT). Continue NSAIDs as tolerated, initiate formal physical therapy 2×/week for 6 weeks, weight-management counseling provided. Follow up in 6 weeks; discuss viscosupplementation or arthroplasty referral if symptoms persist.