Unsp physl fx lower end of l fibula, subs for fx w nonunion

This code signifies a fracture of the growth plate (physis) at the lower end of the left fibula, where the specific type of physeal fracture is not documented. Importantly, this code is used when the patient is receiving follow-up care for this fracture, and the fracture has failed to heal properly, resulting in a nonunion.

Apply this code when a patient presents for ongoing treatment of an unhealed, unspecified physeal fracture of the distal left fibula. This includes situations where surgical intervention for nonunion is being planned or performed, or when conservative management for the nonunion is continuing. It's appropriate for any encounter after the initial treatment where nonunion is the primary concern for this specific fracture.

• Ensure documentation clearly states "nonunion" for the specified fracture site and laterality.
• Verify that the encounter is for subsequent care, not the initial treatment of the fracture.
• Confirm that the fracture type at the physis is not specified (e.g., Salter-Harris type is unknown).