Chronic postrheumatic arthropathy, unsp ankle and foot

This code describes a chronic, non-inflammatory joint disease affecting the ankle and/or foot, which develops as a sequela of rheumatic fever. It is characterized by joint deformities, particularly ulnar deviation of the fingers, but in this specific code, it refers to the ankle and foot without further specification of laterality. The condition is also known as Jaccoud's arthropathy.

Apply this code when documentation confirms a diagnosis of chronic postrheumatic arthropathy affecting an unspecified ankle or foot. This diagnosis typically follows a history of rheumatic fever and presents with chronic joint pain, stiffness, and characteristic deformities. Supporting documentation should clearly link the arthropathy to a prior rheumatic fever episode.

• Ensure the documentation specifies "chronic" and "postrheumatic" to differentiate from acute or other forms of arthropathy.
• Avoid using this code if a more specific site (e.g., right ankle, left foot) or laterality is documented; instead, use the appropriate M12.07- subcategory.
• Always sequence a code for the underlying rheumatic fever (e.g., I00-I02) if it is still active or relevant to the current encounter.