Trimalleolar fracture, open

This code signifies an open fracture involving all three malleoli of the ankle: the medial, lateral, and posterior malleoli. An "open" fracture indicates a break in the skin, exposing the bone to the external environment. This type of injury often results from high-energy trauma.

Apply this code when documentation clearly states an open trimalleolar ankle fracture. This typically occurs following severe ankle inversion or eversion injuries. Supporting documentation should detail the involvement of all three malleoli and confirm the presence of an open wound communicating with the fracture site.

• Ensure the documentation explicitly states "open" to differentiate from closed trimalleolar fractures.
• Verify that all three malleoli (medial, lateral, posterior) are specifically mentioned as fractured.
• Consider additional codes for associated injuries, such as nerve damage or vascular compromise, if documented.