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

This code signifies a left second metacarpal bone fracture that has not healed properly, specifically experiencing nonunion, and the patient is currently receiving care for this complication. It indicates a persistent break in the bone despite the typical healing period, requiring ongoing medical management.

Apply this code for patients presenting with a previously diagnosed left second metacarpal fracture that has failed to unite, and they are undergoing treatment for this nonunion. This is appropriate for follow-up visits, surgical interventions, or other management related to the unhealed fracture.

• Ensure documentation clearly states "nonunion" and specifies the second metacarpal of the left hand.
• Verify this is a "subsequent encounter" for the fracture, not the initial treatment.
• Confirm the laterality (left) and the specific bone (second metacarpal) are accurately documented.