Ankylosis, left hand

This code describes the pathological fusion or stiffening of a joint in the left hand, resulting in a significant loss of range of motion. This ankylosis can be due to various underlying conditions such as arthritis, trauma, or infection, leading to immobility of the affected joint(s).

Apply this code when documentation explicitly states ankylosis affecting the left hand. This includes conditions like fibrous or bony fusion of carpal, metacarpal, or phalangeal joints on the left side. Supporting documentation should detail the specific joint(s) involved and the laterality.

• Specify the underlying cause of the ankylosis with an additional code if known (e.g., rheumatoid arthritis).
• Differentiate from joint stiffness without actual fusion; "stiffness" alone may not warrant this code.
• Ensure laterality is clearly documented as left hand, not bilateral or unspecified.