Unsp fx low end l ulna, subs for opn fx type I/2 w malunion

This code signifies a follow-up encounter for a previously sustained, unspecified fracture of the lower end of the left ulna. Specifically, it indicates that the initial injury was an open fracture classified as Type I or II, and the bone is now healing incorrectly, resulting in malunion.

Use this code when a patient presents for ongoing care or evaluation of a malunited open fracture (Type I or II) of the distal left ulna. This applies to situations where the fracture has not healed in a functionally or anatomically acceptable position, requiring further medical intervention or monitoring.

• Ensure documentation clearly specifies "left ulna" and "lower end" to support this code.
• Verify the initial fracture was indeed an open fracture type I or II, and that malunion is explicitly documented.
• Do not use for initial encounters or for nonunion; specific codes exist for those scenarios.