Oth fx upper end r ulna, subs for opn fx type I/2 w malunion

This code indicates a fracture in the upper portion of the right ulna, excluding the olecranon or coronoid process, that was initially an open fracture of type I or II. The patient is now in a subsequent encounter, and the fracture has healed in an anatomically incorrect or misaligned position (malunion).

Use this code for a patient presenting for follow-up care, rehabilitation, or further surgical intervention related to a previously treated open type I or II fracture of the upper right ulna (not olecranon or coronoid) that has resulted in malunion. This applies when the malunion is the primary focus of the current encounter.

• Ensure the documentation clearly specifies "malunion" and not nonunion or delayed union.
• Verify the initial fracture was an open type I or II and located in the upper ulna, excluding the olecranon or coronoid.
• This code is for subsequent encounters, not the initial treatment of the fracture.