Monteggia's fx left ulna, init for opn fx type 3A/B/C

This code signifies a Monteggia's fracture affecting the left ulna, specifically an open fracture classified as Type IIIA, IIIB, or IIIC. A Monteggia's fracture is a complex injury involving a fracture of the proximal or middle third of the ulna with an associated dislocation of the radial head. The "open" nature indicates the bone has broken through the skin, and the Type IIIA, IIIB, or IIIC classification denotes significant soft tissue damage and contamination.

This code is appropriate for the initial treatment of a patient presenting with a newly diagnosed Monteggia's fracture of the left ulna where the fracture is open and meets the criteria for Gustilo-Anderson Type IIIA, IIIB, or IIIC. This includes emergency department visits, initial surgical procedures, or the first inpatient admission for this specific injury.

• Ensure documentation clearly specifies "left" ulna and confirms the Monteggia's pattern (ulnar fracture with radial head dislocation).
• Verify the Gustilo-Anderson classification (Type IIIA, IIIB, or IIIC) for open fractures is explicitly stated by the provider.
• This "C" encounter code is only for the initial treatment phase; subsequent encounters will require different seventh characters.