Monteggia's fx r ulna, subs for opn fx type I/2 w nonunion

This code signifies a Monteggia's fracture involving the right ulna, which is a specific type of forearm fracture characterized by a fracture of the ulna and dislocation of the radial head. The "open fracture type I or II" indicates that the skin was broken at the time of injury, with minimal to moderate soft tissue damage. The "nonunion" specifies that the bone has failed to heal completely after a period of time.

Use this code for follow-up encounters when a patient is receiving ongoing treatment for a Monteggia's fracture of the right ulna that was initially an open fracture (Type I or II) and has subsequently developed nonunion. This includes situations where the patient is undergoing further surgical intervention, cast changes, or other management specifically addressing the nonunion.

• Ensure documentation clearly specifies "right ulna" and "Monteggia's fracture" to differentiate from other forearm fractures.
• Verify the original injury was an "open fracture type I or II" and that the current encounter is for management of "nonunion."
• Do not use this code for initial treatment or for routine follow-up of a healing fracture; it is specific to nonunion.