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

This code signifies a fracture involving all three malleoli (medial, lateral, and posterior) of the left ankle, where the bone fragments remain in their normal anatomical alignment. The fracture has not healed as expected, indicating a nonunion, and the patient is presenting for follow-up care or treatment related to this ongoing issue.

This code is appropriate for patients returning for evaluation or management of a previously diagnosed trimalleolar fracture of the left lower leg that has failed to unite. This includes scenarios such as follow-up appointments, imaging studies to assess nonunion progression, or preparation for surgical intervention to address the nonunion.

• Ensure documentation clearly states "nondisplaced" and "trimalleolar" for the left lower leg.
• Verify that the encounter is for a "subsequent" visit and specifically addresses the "nonunion" of a "closed" fracture.
• Do not use for initial treatment or for malunion, which is a different complication.