Nondisp fx of shaft of MC bone, subs for fx w malunion

This code describes a situation where a patient has a fracture in the shaft of a metacarpal bone, excluding the thumb, that was not displaced at the time of injury. The fracture has healed incorrectly, resulting in a malunion, and the patient is presenting for follow-up care or treatment related to this complication.

Apply this code when a patient is seen for ongoing management of a previously diagnosed nondisplaced metacarpal shaft fracture (other than the thumb) that has healed with malunion. This would include visits for physical therapy, assessment of range of motion, or discussion of surgical correction for the malunion.

• Ensure documentation clearly states "malunion" and specifies "nondisplaced" for the initial fracture.
• Verify the fracture location is the shaft of a metacarpal other than the thumb.
• This code is for a subsequent encounter, indicating the initial treatment phase is complete.