Chronic postrheumatic arthropathy [Jaccoud], left knee

This code describes a chronic inflammatory joint condition affecting the left knee, specifically a non-erosive arthropathy that develops as a sequela to recurrent attacks of rheumatic fever. It is characterized by joint deformity, particularly ulnar deviation of the fingers, but in this case, it's localized to the left knee. The condition is distinct from rheumatoid arthritis and typically does not involve significant joint destruction.

Use this code for patients diagnosed with chronic postrheumatic arthropathy (Jaccoud's arthropathy) specifically affecting the left knee. Documentation should clearly indicate a history of rheumatic fever and the presence of chronic, non-erosive arthropathy in the left knee, often presenting with deformities. This code is appropriate when the condition is long-standing and not an acute episode.

• Ensure documentation specifies "chronic" and clearly links the arthropathy to a history of rheumatic fever.
• Verify the affected joint is the left knee; laterality is crucial for accurate coding.
• Do not confuse with codes for acute rheumatic fever with cardiac involvement or other forms of inflammatory arthropathy like rheumatoid arthritis.