Nondisp trimalleol fx unsp low leg, 7thM

This code describes a trimalleolar ankle fracture where the bone fragments are still in their normal anatomical alignment (nondisplaced). It specifically indicates an open fracture (skin broken) of Gustilo-Anderson type I or II, and that the fracture has failed to heal properly in a subsequent encounter.

Use this code for follow-up visits or hospitalizations when a patient with a previously diagnosed nondisplaced trimalleolar open fracture (Type I or II) is being treated for nonunion. This includes scenarios where surgical intervention for nonunion is being planned or performed, or during ongoing conservative management for the unhealed fracture.

• Ensure documentation clearly specifies "nondisplaced" and "trimalleolar" for accurate coding.
• Confirm the encounter is for a "subsequent encounter" and that "nonunion" is explicitly documented.
• Verify the open fracture type is documented as I or II; other types would require a different code.