Nondisp fx of lateral malleolus of unsp fibula, 7thN

This code signifies a previously diagnosed fracture of the outer ankle bone (lateral malleolus) that was initially an open fracture (skin broken) of a severe type (IIIA, IIIB, or IIIC). The fracture is currently not healing as expected (nonunion) and is not displaced.

Apply this code when documenting follow-up care for a patient with a known, non-healing open lateral malleolus fracture (type IIIA, IIIB, or IIIC) that remains nondisplaced. This is used for subsequent encounters after the initial treatment of the fracture.

• Ensure documentation clearly specifies "nonunion" and the original open fracture type (IIIA, IIIB, or IIIC).
• Confirm the fracture is nondisplaced and located in the lateral malleolus.
• This code is for subsequent encounters; use the appropriate initial encounter code for the acute injury.