Ankylosis, left foot

This code signifies the pathological stiffening and immobility of a joint in the left foot, resulting from fusion of the bones. This condition restricts the normal range of motion, often causing pain and functional impairment.

Apply this code when documentation clearly indicates a diagnosis of ankylosis affecting any joint within the left foot. This typically arises from conditions like severe arthritis, trauma, or congenital anomalies. Supporting documentation should specify the laterality and the nature of the joint fusion.

• Ensure documentation specifies "left foot" to support laterality.
• Distinguish from arthrodesis (surgical fusion), which is coded differently.
• Look for underlying causes (e.g., osteoarthritis, rheumatoid arthritis) to code concurrently if applicable.