Disp fx of lateral malleolus of l fibula, 7thN

This code signifies a left fibula fracture, specifically involving the lateral malleolus, that has shifted out of its normal alignment. It indicates that the fracture was an open type IIIA, IIIB, or IIIC, meaning there was a significant break in the skin and soft tissue, and it is now in a stage where the bone fragments have failed to heal together after an initial treatment.

This code is appropriate for documenting follow-up care for a patient with a previously treated, but now unhealed, displaced open fracture of the left lateral malleolus. This includes situations where the patient is undergoing further interventions, such as revision surgery, bone grafting, or prolonged immobilization, due to the nonunion. It should be used when the nonunion is confirmed and the open nature of the original fracture was severe (Type IIIA, IIIB, or IIIC).

• Ensure documentation clearly specifies "nonunion" and the "subsequent encounter" for this specific fracture.
• Verify the original fracture was classified as an open type IIIA, IIIB, or IIIC.
• Differentiate from malunion, which implies healing in an incorrect position, rather than a complete failure to heal.