Disp fx of lateral malleolus of unsp fibula, 7thM

This code signifies a displaced fracture of the lateral malleolus, which is the prominent bony projection on the outside of the ankle, specifically when the fracture has not healed properly (nonunion). It indicates that the initial injury was an open fracture of Type I or II, meaning there was a wound communicating with the fracture site, and the patient is now in a subsequent phase of care for this nonunion.

Use this code for patients presenting for follow-up care, such as cast changes, wound care, or surgical planning, for a previously diagnosed displaced open lateral malleolus fracture (Type I or II) that has failed to unite. This applies when the nonunion is the primary focus of the current encounter.

• Ensure documentation clearly specifies "displaced" and "lateral malleolus" for the fibula fracture.
• Verify the original injury was an "open fracture type I or II" and that "nonunion" is explicitly documented.
• Confirm this is a "subsequent encounter" and not the initial treatment or an encounter for routine healing.