Oth fx shaft of left ulna, init for opn fx type 3A/B/C

This code signifies a fracture of the shaft of the left ulna that is not further specified as a Monteggia or Galeazzi fracture, and is characterized by a severe open wound. The "C" suffix indicates that this is the initial encounter for treatment of this specific injury, which involves significant soft tissue damage and contamination (Gustilo-Anderson Type IIIA, IIIB, or IIIC).

This code is appropriate for the initial inpatient or outpatient encounter when a patient presents with a severe open fracture of the left ulnar shaft requiring definitive treatment. It is used when the wound is extensive, with significant soft tissue loss, periosteal stripping, or arterial injury, indicating a high-energy trauma mechanism.

• Ensure documentation clearly specifies "left ulna" and "shaft" to differentiate from other ulnar fracture locations.
• Confirm the open fracture type (IIIA, IIIB, or IIIC) is explicitly documented by the provider to support the specificity of this code.
• Remember the "C" suffix indicates an initial encounter; subsequent care will require different seventh characters.