Oth fx upper end l ulna, subs for opn fx type I/2 w nonunion

This code signifies a non-healing fracture in the upper portion of the left ulna, specifically an open fracture classified as Type I or II. This indicates the bone has broken through the skin, and the healing process has failed to unite the bone fragments after initial treatment.

Apply this code when documenting a patient presenting for follow-up care of a previously treated open fracture of the proximal left ulna, where radiographic or clinical evidence confirms nonunion. This is appropriate for subsequent visits after the initial treatment of the fracture.

• Ensure documentation clearly specifies "nonunion" and the "subsequent encounter" status.
• Verify the fracture is of the "upper end" (proximal) of the ulna and on the "left" side.
• Confirm the original fracture was an "open fracture type I or II" as this impacts the specific code choice.