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

This code describes a fracture of the shaft of the first metacarpal bone in the left hand that was initially nondisplaced but has healed improperly, resulting in malunion. This indicates a previous injury where the bone fragments have united in a deformed or misaligned position.

This code is appropriate for follow-up encounters where a patient is being treated for complications arising from a malunited fracture of the left first metacarpal shaft. This includes scenarios such as pain, functional limitations, or planning for corrective surgery due to the malunion. It should be used after the initial healing period when the malunion has been identified.

• Ensure documentation clearly specifies "malunion" and the subsequent encounter status.
• Verify the fracture location is the shaft of the first metacarpal and laterality is left.
• Do not use for initial fracture treatment or for nonunion, which is a different complication.