Displ Maisonneuve's fx unsp leg, 7thN

This code describes a specific type of ankle fracture, a Maisonneuve's fracture, which involves a spiral fracture of the proximal fibula with an associated injury to the deltoid ligament and/or medial malleolus, and disruption of the tibiofibular syndesmosis. In this instance, the fracture is displaced, meaning the bone fragments are out of alignment, and it is an open fracture (Type IIIA, IIIB, or IIIC) that has failed to heal properly (nonunion).

Use this code for a patient presenting for follow-up care of a previously diagnosed and treated Maisonneuve's fracture that was initially an open fracture (Type IIIA, IIIB, or IIIC) and has subsequently developed nonunion. This code is appropriate when the fracture is displaced and the patient is receiving ongoing treatment for the nonunion, such as surgical intervention or cast changes.

• Ensure documentation clearly specifies "displaced" and "nonunion" for a Maisonneuve's fracture.
• Verify the original open fracture type (IIIA, IIIB, or IIIC) is documented to support this specific code.
• This is a "subsequent encounter" code; do not use for the initial treatment of the fracture.