Disp fx of neck of unsp MC bone, subs for fx w malunion

This code signifies a displaced fracture located in the neck of an unspecified metacarpal bone that has previously been treated but is now presenting with malunion. Malunion indicates that the fracture has healed, but in an incorrect or undesirable anatomical position. This is a subsequent encounter, meaning the patient is receiving follow-up care for this specific complication.

Use this code for patients presenting for ongoing management or evaluation of a metacarpal neck fracture that has healed with malunion. This would apply when the physician is assessing the functional impact of the malunion, planning corrective surgery, or monitoring the patient's progress post-correction. It is appropriate for follow-up visits after initial treatment of the fracture.

• Ensure documentation clearly specifies "malunion" and the "neck" of the metacarpal.
• Verify this is a "subsequent encounter" for the malunion, not an initial treatment.
• Confirm the laterality (left/right) is not specified in the documentation, as this code is for an "unspecified" metacarpal.