Chondromalacia, left ankle and joints of left foot

This diagnosis code signifies the degeneration of articular cartilage on the posterior surface of the patella or other joint surfaces within the left ankle and foot, characterized by softening and fissuring. It represents a condition causing pain and dysfunction due to cartilage breakdown in these specific anatomical locations.

Apply this code when documentation explicitly states chondromalacia affecting the left ankle and/or any joint within the left foot. This is appropriate for conditions like patellofemoral syndrome affecting the ankle, or similar degenerative changes in the talocrural, subtalar, or midfoot joints. Supporting documentation should include physician notes detailing the diagnosis and laterality.

• Ensure the documentation specifies "chondromalacia" and clearly indicates the left ankle and/or left foot joints.
• Do not confuse this with osteoarthritis (M19.-) unless the documentation explicitly states both conditions are present. Chondromalacia refers specifically to cartilage softening, not necessarily full-blown arthritis.
• Verify laterality. If the condition affects the right ankle/foot, a different code (M94.271) would be appropriate. If bilateral, use M94.273.