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

This code signifies a healed, but improperly aligned (malunited), fracture of the second metacarpal bone in the patient's left hand. This indicates that the bone has united after the initial injury, but the alignment of the bone fragments is not anatomically correct, potentially leading to functional impairment or cosmetic deformity.

Apply this code when documenting follow-up care for a patient with a previously treated fracture of the left second metacarpal, where imaging or clinical assessment confirms that the bone has healed in a malunited position. This is appropriate for encounters focused on managing the complications of malunion, such as pain, reduced range of motion, or planning for corrective surgery.

• Ensure documentation clearly specifies "left hand" and "second metacarpal."
• Verify that the encounter is for a "subsequent encounter" and that "malunion" is explicitly stated or clearly implied by the clinical findings.
• Do not use this code for initial fracture treatment or for nonunion (failure of the bone to heal).