Unsp fx shaft of l ulna, subs for opn fx type I/2 w malunion

This code signifies an unspecified fracture of the shaft of the left ulna that was initially an open fracture (Type I or II) and is now presenting with malunion. It indicates a follow-up encounter for a previously treated open ulnar shaft fracture where the bone has healed in an anatomically incorrect position.

Use this code for patients presenting for follow-up care of a left ulnar shaft fracture that was initially open and has subsequently healed with malunion. This would apply when the physician is assessing the malunion, planning corrective surgery, or managing the patient's symptoms related to the malunion.

• Ensure documentation clearly specifies "malunion" and that the initial fracture was an "open fracture type I or II."
• Verify the laterality (left ulna) and the specific bone segment (shaft).
• Do not use for nonunion; a separate code exists for that complication.