Displ trimalleol fx unsp low leg, 7thN

This code describes a complex ankle fracture involving all three malleoli (medial, lateral, and posterior) that is no longer in proper alignment. It specifically indicates an open fracture where the bone has broken through the skin, classified as a severe type (IIIA, IIIB, or IIIC), and has failed to heal properly after initial treatment.

Use this code for a patient presenting for follow-up care of a previously treated trimalleolar fracture that was open and is now complicated by nonunion. This applies when the fracture fragments remain displaced and the wound is severe, requiring ongoing management for both the nonunion and the open wound.

• Requires documentation of an open fracture type IIIA, IIIB, or IIIC and nonunion.
• Confirm the encounter is for subsequent care, not initial treatment.
• Ensure the fracture is explicitly described as trimalleolar and displaced.