Oth physeal fx upper end of l fibula, subs for fx w nonunion

This code describes a fracture in the growth plate (physis) at the top of the left fibula, which is not healing properly. This specific code is used when the patient is receiving follow-up care for this non-healing fracture.

This code is appropriate for subsequent encounters when a patient is being treated for a previously diagnosed physeal fracture of the upper left fibula that has failed to unite. This includes situations where the patient is undergoing further evaluation, conservative management, or surgical intervention for the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the left fibula's upper end.
• Verify this is a subsequent encounter, not the initial treatment for the fracture.
• Always sequence this code after any definitive treatment codes for the nonunion.