Nondisp trimalleol fx unsp low leg, 7thN

This code describes a previously diagnosed trimalleolar fracture of an unspecified lower leg that was initially an open fracture (Type IIIA, IIIB, or IIIC) and is now complicated by nonunion. Nonunion indicates that the bone fragments are failing to heal together after a significant period.

Use this code for follow-up encounters where a patient with a history of an open trimalleolar fracture of the lower leg is being treated for nonunion. This applies when the fracture was initially classified as an open Type IIIA, IIIB, or IIIC, and the current encounter addresses the ongoing healing complication.

• Ensure documentation clearly specifies "nonunion" as the current complication of the fracture.
• Verify the original fracture was an open trimalleolar fracture, Type IIIA, IIIB, or IIIC.
• This code is for subsequent encounters, not the initial treatment of the fracture.