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

This code signifies a follow-up encounter for a fibular shaft fracture where the specific location on the shaft is not documented, and the laterality (left or right leg) is also unspecified. Crucially, the fracture was initially closed, but healing has failed, resulting in a nonunion.

Use this code when a patient presents for ongoing management of a previously treated closed fibular shaft fracture that has not healed properly, and the documentation does not specify the exact fibula or shaft location. This typically applies to situations where surgical intervention for nonunion is being planned or conservative management for nonunion is continuing.

• Ensure documentation clearly states "nonunion" and that the fracture was initially closed.
• Verify that no more specific anatomical site on the fibular shaft or laterality is documented; otherwise, a more specific code should be used.
• This code is for subsequent encounters; an initial encounter for the fracture would use a different code.