Unsp fx unsp metacarpal bone, subs for fx w nonunion

This code signifies a fracture of an unknown metacarpal bone that has failed to heal properly, and the patient is presenting for follow-up care or treatment related to this nonunion. The specific metacarpal involved is not documented, nor is the type of fracture. This indicates a chronic healing complication of a previously sustained injury.

Use this code when a patient presents with a documented nonunion of an unspecified metacarpal fracture, and the encounter is for ongoing management, evaluation, or treatment of this complication. This applies to situations where the initial fracture details (e.g., specific bone, type of fracture) are not available or clearly documented in the current record.

• Ensure documentation clearly states "nonunion" and that the encounter is for subsequent care of the fracture.
• Avoid using this code if the specific metacarpal bone is identified; instead, use a more specific code from the S62.3 category.
• Always sequence this code after the primary reason for the encounter if the nonunion is a secondary diagnosis.