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

This code signifies a non-specific fracture of the shaft of the left ulna that was initially an open fracture (Type I or II) and is now presenting with malunion. Malunion indicates that the bone has healed, but in an incorrect anatomical position or alignment.

Apply this code when documenting follow-up care for a patient with a previously open left ulnar shaft fracture (Gustilo-Anderson Type I or II) that has healed with a noticeable deformity or angulation. This would be used during subsequent encounters after the initial treatment phase, focusing on the complications of healing.

• Ensure documentation clearly specifies "left ulna" and "shaft" to differentiate from other ulnar fracture locations.
• Verify the original fracture was an open fracture, Type I or II, as this impacts the 7th character.
• Confirm the presence of malunion, as this distinguishes it from nonunion or routine healing.