Patellar tendinitis, right knee

This code signifies inflammation of the patellar tendon in the right knee, often referred to as "jumper's knee." It typically results from repetitive stress or overuse, causing pain and tenderness just below the kneecap.

Apply this code when documentation explicitly states patellar tendinitis affecting the right knee. Supporting documentation should include a physical exam noting tenderness at the inferior pole of the patella and a clinical diagnosis of patellar tendinitis.

• Ensure laterality is clearly documented (right vs. left vs. bilateral).
• Distinguish from patellofemoral pain syndrome (M22.2X-) or other knee pain (M25.56-).
• Consider an external cause code if the tendinitis is due to a specific injury or activity.