Displ trimalleol fx unsp low leg, 7thM

This code describes a complex ankle fracture involving all three malleoli (medial, lateral, and posterior) that is displaced, meaning the bone fragments are not properly aligned. It specifically indicates a subsequent encounter for an open fracture (where the skin is broken) of either Type I or Type II, and the fracture has failed to heal properly (nonunion).

Apply this code when documenting follow-up care for a patient with a previously treated trimalleolar fracture that was open (Type I or II) and is now complicated by nonunion. This would include scenarios such as surgical intervention for the nonunion, casting changes, or ongoing management of the unhealed fracture.

• Ensure documentation clearly specifies a trimalleolar fracture, displacement, and an open fracture type I or II.
• Verify this is a subsequent encounter, not the initial treatment for the fracture.
• Confirm the presence of nonunion, indicating a failure of the fracture to heal.