Oth fx low end l ulna, 7thR

This code signifies a malunion of an open fracture involving the lower end of the left ulna, specifically for a subsequent encounter. The original injury was a severe open fracture (Type IIIA, IIIB, or IIIC), indicating significant soft tissue damage and bone exposure. Malunion implies that the bone has healed in an anatomically incorrect or misaligned position.

This code is appropriate for documenting follow-up care for a patient whose severe open fracture of the distal left ulna has healed improperly. It should be used when the patient presents for evaluation or treatment related to this malunion, such as for pain, functional limitations, or consideration of corrective surgery.

• Ensure documentation clearly specifies "malunion" and the "left ulna" at the lower end.
• Verify the original open fracture was classified as Type IIIA, IIIB, or IIIC.
• This code is for a subsequent encounter, not the initial treatment of the fracture.