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

This code signifies a fracture of the shaft of an unspecified metacarpal bone that was initially nondisplaced but has now healed improperly, resulting in malunion. The patient is in a subsequent phase of care for this specific fracture complication.

Use this code when a patient presents for follow-up care, rehabilitation, or management of complications related to a previously treated nondisplaced metacarpal shaft fracture that has healed in an anatomically incorrect position. This indicates that the initial fracture treatment was completed, but the bone has united with an unacceptable angular or rotational deformity.

• Ensure documentation clearly states "malunion" and specifies the metacarpal shaft as the fracture site.
• Verify that the encounter is for follow-up care related to the malunion, not the initial fracture treatment.
• This code requires a 7th character "P" for subsequent encounter for fracture with malunion.