Oth fx shaft of unsp ulna, 7thR

This code signifies a previously sustained open fracture of the shaft of the ulna, specifically a severe type IIIA, IIIB, or IIIC injury, that is now healing with an abnormal alignment or angulation. The patient is presenting for follow-up care related to this malunion.

Apply this code when a patient with a documented history of a severe open ulnar shaft fracture (Type IIIA, IIIB, or IIIC) is seen for ongoing management of a malunion. This would include scenarios where surgical correction of the malunion is being planned or evaluated, or during conservative management of the malunion.

• Ensure documentation clearly specifies "malunion" and the original fracture was an open Type IIIA, IIIB, or IIIC.
• Verify this is a subsequent encounter for the fracture, not the initial treatment.
• Do not use if the fracture is still in the acute healing phase without evidence of malunion.