Recurrent dislocation of patella, right knee

This code signifies an unstable right patella that repeatedly displaces from its normal anatomical position within the trochlear groove. This condition often results in pain, swelling, and functional impairment of the knee joint. It is distinct from an initial or acute dislocation.

Apply this code when documentation clearly indicates a history of prior patellar dislocations in the right knee, and the patient is presenting with symptoms related to a subsequent episode of dislocation or chronic instability. Supporting documentation should include a physician's diagnosis of recurrent patellar dislocation and specify the affected side as the right knee.

• Ensure the documentation explicitly states "recurrent" or "chronic instability" of the patella, not just a single event.
• Verify the laterality; this code is specific to the right knee. Use the appropriate code for the left or bilateral involvement.
• Do not confuse with acute or initial patellar dislocations (e.g., S83.001A for initial encounter).