Unsp physl fx lower end of r fibula, subs for fx w malunion

This code signifies a fracture of the growth plate (physis) at the lower end of the right fibula, where the bone has healed incorrectly (malunion). This specific code is used when the patient is receiving follow-up care for this previously treated fracture that has resulted in an abnormal alignment or angulation.

Use this code for patients presenting for evaluation or treatment of complications arising from a malunited physeal fracture of the right distal fibula. This includes scenarios where surgical correction of the malunion is being planned or performed, or during ongoing conservative management of the malunion.

• Requires a seventh character "P" for subsequent encounter with malunion.
• Ensure documentation clearly specifies "right" fibula and "lower end" or "distal" to support this code.
• Distinguish from nonunion (S89.301N) or routine follow-up without malunion (S89.301D).