Displ bimalleol fx unsp low leg, subs for clos fx w nonunion

This code describes a situation where both the medial and lateral malleoli of an unspecified lower leg bone (tibia or fibula) are fractured, and the broken bone fragments are not properly aligned. This specific code is used when the patient is receiving follow-up care for this fracture, and the bone has failed to heal after a typical period, but the skin over the fracture site remains intact.

Use this code for subsequent encounters (e.g., office visits, follow-up imaging) for a patient with a previously diagnosed displaced bimalleolar fracture where the fracture has not united. This applies when the physician is managing the nonunion of the closed fracture, such as monitoring healing progress, discussing surgical options for nonunion, or managing complications related to the nonunion.

• Ensure documentation clearly states "nonunion" and "closed fracture" for a subsequent encounter.
• Verify that the fracture is indeed bimalleolar and displaced, even if the specific bone (tibia/fibula) isn't specified.
• Do not use this code for initial treatment or for open fractures.