Unsp fx shaft of left fibula, subs for clos fx w nonunion

This code signifies a fracture located in the shaft of the left fibula, where the specific type of fracture is not documented. The encounter is for follow-up care of this previously diagnosed closed fracture, and there is evidence that the bone is failing to heal properly (nonunion).

Use this code for a patient presenting for ongoing management of a left fibula shaft fracture that has not united, and the initial fracture type was not specified. This applies to subsequent visits after the initial treatment, where the nonunion is being addressed or monitored.

• Ensure documentation clearly states "left fibula shaft" and "nonunion" for a closed fracture.
• Verify that this is a subsequent encounter, not the initial treatment of the fracture.
• Do not use if the specific type of fibula shaft fracture (e.g., transverse, oblique) is documented; a more specific code would then apply.