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

This code signifies a fracture of the shaft of any metacarpal bone that was initially nondisplaced but has since failed to heal properly (nonunion). It indicates that the patient is in a subsequent phase of care for this specific complication.

Apply this code when a patient presents for follow-up care of a previously diagnosed nondisplaced metacarpal shaft fracture that has been determined to have nonunion. This would typically be used after initial treatment attempts have failed and further intervention or monitoring for the nonunion is ongoing.

• Ensure documentation clearly states "nonunion" and specifies the metacarpal shaft.
• Verify that the encounter is for subsequent care of the fracture, not the initial treatment.
• Confirm the fracture was originally nondisplaced; displaced fractures have different codes.