Ankylosis, unspecified joint

This code signifies the pathological fusion or stiffening of an unspecified joint, resulting in a loss of normal range of motion. It indicates a condition where the joint surfaces have become abnormally united, either by bone, cartilage, or fibrous tissue.

Use this code when documentation clearly states "ankylosis" but does not specify the affected joint. This typically occurs when the exact anatomical location is unknown or not recorded by the provider. It is appropriate when the physician's notes confirm joint immobility due to fusion without further specificity.

• Avoid using this code if the specific joint affected by ankylosis is documented; instead, code to the more precise anatomical site.
• Query the provider if "ankylosis" is documented without a specified joint to obtain a more accurate and specific diagnosis.
• This code should be a last resort when no further specificity can be obtained regarding the affected joint.