Fracture of lateral malleolus, open

This code signifies a break in the fibula's distal end, specifically the bony prominence on the outside of the ankle, where the skin and soft tissues overlying the fracture site are compromised, exposing the bone to the external environment. This type of fracture carries a higher risk of infection and often requires more complex management than a closed fracture.

Apply this code when documentation clearly indicates an open fracture of the lateral malleolus, often resulting from high-energy trauma. Supporting documentation should specify the location of the fracture (lateral malleolus) and explicitly state that it is an "open" fracture, detailing the presence of a wound communicating with the fracture.

• Differentiate carefully between "open" and "closed" fractures; this code is strictly for open injuries.
• Ensure documentation specifies the exact malleolus involved (lateral, medial, posterior) to avoid miscoding.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, followed by codes for any associated injuries or complications.