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

This code signifies a right lower leg fracture involving both the medial and lateral malleoli, where the bone fragments are not in their anatomical alignment. The "subsequent encounter" indicates the patient is receiving follow-up care for this injury, and "nonunion" means the fracture is failing to heal despite treatment.

Apply this code for patients presenting for ongoing management of a previously diagnosed displaced bimalleolar fracture of the right lower leg that has not united. This includes follow-up visits for casting, bracing, or surgical planning related to the nonunion. It is appropriate when the initial treatment has failed to achieve bone healing.

• Ensure documentation clearly states "displaced," "bimalleolar," "right lower leg," and "nonunion."
• Verify the encounter is for follow-up care, not the initial treatment of the acute fracture.
• Pair with an external cause code (V00-Y99) if the cause of the fracture is known and documented.