Unsp fx upr end r ulna, subs for opn fx type I/2 w nonunion

This code signifies a follow-up visit for an unspecified fracture located at the upper portion of the right ulna. The initial injury was an open fracture, specifically classified as Type I or Type II, and the bone has failed to heal properly, resulting in a nonunion.

Apply this code for subsequent encounters where a patient is receiving ongoing treatment for a previously diagnosed open fracture (Type I or II) of the proximal right ulna that has progressed to a nonunion. This includes visits for monitoring, surgical planning for nonunion repair, or conservative management of the nonunion.

• Requires a seventh character "M" for subsequent encounter for open fracture type I or II with nonunion.
• Ensure documentation clearly specifies the right ulna and the nonunion status of the open fracture.
• Do not use for initial encounters or for fractures that are healing normally.