Nondisp fx of nk of 1st MC bone, unsp hand, 7thP

This code describes a situation where a patient has a previously diagnosed, non-displaced fracture of the neck of the first metacarpal bone (thumb) that is now healing improperly, resulting in malunion. The specific hand affected is not documented.

Apply this code when a patient presents for follow-up care of a first metacarpal neck fracture that was initially non-displaced, but imaging or clinical assessment confirms malunion during the healing process. This indicates a complication of healing requiring ongoing management.

• Ensure documentation clearly states "malunion" and specifies the first metacarpal neck.
• Verify the encounter is for follow-up care of the fracture, not initial treatment.
• Confirm the fracture was initially non-displaced; displaced fractures would use a different code.