Unsp physl fx low end ulna, left arm, subs for fx w malunion

This code signifies an unspecified growth plate fracture at the lower end of the ulna in the left arm that has healed improperly. Malunion indicates that the fracture has united but in a deformed or misaligned position, potentially leading to functional impairment or cosmetic deformity.

This code is appropriate for follow-up encounters where a patient is being treated for complications arising from a previously sustained left ulnar physeal fracture that has healed with malunion. It would be used when assessing the extent of the malunion, planning corrective surgery, or managing ongoing symptoms related to the deformity.

• Ensure documentation clearly specifies "malunion" and not "nonunion" or "delayed union."
• Verify the fracture location is the lower end of the ulna and laterality is left arm.
• Confirm this is a subsequent encounter for the fracture, not the initial treatment.