Nondisp bimalleol fx r low leg, 7thN

This code describes a situation where a patient has a non-displaced fracture involving both the medial and lateral malleoli of the right lower leg. Crucially, this is a subsequent encounter for an open fracture that was initially classified as type IIIA, IIIB, or IIIC, and the fracture has failed to heal properly, resulting in a nonunion.

Use this code when documenting follow-up care for a patient with a right bimalleolar fracture that was previously an open fracture of Gustilo-Anderson type IIIA, IIIB, or IIIC, and imaging or clinical assessment confirms a nonunion. This applies to ongoing treatment, such as cast changes, physical therapy, or preparation for revision surgery, when the nonunion is the primary focus.

• Ensure documentation clearly specifies "nondisplaced" for both malleoli and "nonunion" for the fracture.
• Verify the original open fracture was classified as Gustilo-Anderson type IIIA, IIIB, or IIIC.
• Confirm this is a subsequent encounter, not the initial treatment for the fracture.