Nondisp trimalleol fx l low leg, subs for clos fx w malunion

This code describes a specific type of ankle fracture involving all three malleoli (medial, lateral, and posterior) in the left lower leg. It indicates that the fracture fragments are still in their anatomical position (nondisplaced) and the patient is in a subsequent phase of care where the fracture is healing incorrectly (malunion) but the skin is intact (closed).

This code is appropriate for follow-up encounters where a patient with a previously diagnosed trimalleolar fracture of the left lower leg is being treated for a malunion that does not require open surgical intervention. It signifies that the fracture is not healing properly, leading to deformity or functional impairment, and the encounter is for ongoing management of this complication.

• Ensure documentation clearly specifies "nondisplaced" and "trimalleolar" for the left lower leg.
• Confirm the encounter is "subsequent" and the fracture is "closed" with evidence of "malunion."
• Do not use this code for initial treatment, open fractures, or nonunion; separate codes exist for those scenarios.