Ankylosis, other specified joint

This code represents the pathological stiffening and immobility of a joint due to fusion of the bones, specifically in joints other than those of the spine, hip, knee, shoulder, elbow, wrist, ankle, or foot. This condition can result from various underlying diseases or injuries, leading to significant functional impairment.

Assign this code when documentation clearly indicates ankylosis affecting a joint not otherwise specified by a more granular code. This includes joints such as the temporomandibular joint, sternoclavicular joint, or acromioclavicular joint. Supporting documentation should specify the affected joint and confirm the diagnosis of ankylosis.

• Ensure the documentation specifies a joint other than those with dedicated ankylosis codes (e.g., M43.2- for spinal, M24.61- for shoulder).
• Always code to the highest level of specificity; if a more precise code for ankylosis of a specific joint exists, use that instead.
• Consider an additional code to identify the underlying cause of the ankylosis, if known and documented (e.g., inflammatory arthropathy, trauma).