Unsp fx second MC bone, left hand, subs for fx w malunion

This code signifies a fracture of the second metacarpal bone in the left hand that was previously treated but has healed in an anatomically incorrect or misaligned position. This malunion can lead to functional impairment, pain, and cosmetic deformity. The specific type of fracture of the second metacarpal is not documented.

Use this code when a patient presents for follow-up care or treatment of complications related to a previously sustained, unspecified left second metacarpal fracture that has healed with malunion. This applies to situations where the malunion itself is the focus of the encounter, such as for evaluation of ongoing symptoms or planning for corrective surgery.

• Ensure documentation clearly states "malunion" and specifies the left second metacarpal.
• This code is for a subsequent encounter, meaning the initial treatment for the fracture has already occurred.
• If the malunion is causing a specific complication (e.g., chronic pain, nonunion), consider additional codes to capture those details.