Nondisp bimalleol fx unsp low leg, 7thN

This code describes a situation where a patient has a non-displaced fracture involving both the medial and lateral malleoli of an unspecified lower leg, and the fracture has failed to heal properly (nonunion). This specific encounter is for an open fracture classified as type IIIA, IIIB, or IIIC, indicating significant soft tissue damage and potential contamination.

Use this code for follow-up encounters where a patient is being treated for a previously diagnosed bimalleolar fracture of the lower leg that has not united. This applies when the fracture was initially open and severe (Gustilo-Anderson type IIIA, IIIB, or IIIC) and the nonunion is being addressed.

• Ensure documentation clearly specifies "nonunion" and the Gustilo-Anderson classification (IIIA, IIIB, or IIIC) for the open fracture.
• Verify the fracture is explicitly stated as "nondisplaced" and involves both malleoli.
• This code is for subsequent encounters; an initial encounter would use a different code from the S82.84- series.