Nondisp fx of shaft of 1st MC bone, r hand, 7thP

This code signifies a right-hand first metacarpal shaft fracture that was initially nondisplaced but has since healed incorrectly, resulting in malunion. The patient is currently undergoing active treatment for this complication, rather than initial fracture care or routine follow-up after successful healing.

Apply this code when documentation confirms a malunion of a previously nondisplaced fracture of the shaft of the right first metacarpal. This is appropriate for subsequent encounters where the malunion is the focus of treatment, such as surgical correction or ongoing management of symptoms related to the malunion.

• Ensure documentation explicitly states "malunion" and specifies the right first metacarpal shaft.
• Verify the encounter is for ongoing treatment of the malunion, not initial fracture care or routine follow-up of a healed fracture.
• Always sequence this code with an external cause code if the cause of the original fracture is known and relevant to the current encounter.