Oth physl fx lower end of unsp femur, subs for fx w malunion

This code signifies a fracture of the growth plate (physis) at the lower end of the femur in an unspecified leg, which is currently being treated for a malunion. A malunion indicates that the fracture has healed, but in an unsatisfactory or deformed position. This diagnosis is used during follow-up care after the initial injury.

This code is appropriate for subsequent encounters where a patient is receiving treatment or evaluation for a previously sustained physeal fracture of the distal femur that has healed improperly. This includes scenarios such as surgical correction of the malunion, physical therapy to address functional deficits from the malunion, or ongoing monitoring of the malunion's impact.

• Ensure documentation clearly states "malunion" and specifies the lower end of the femur.
• Verify this is a subsequent encounter, not the initial treatment for the fracture.
• Do not use this code if the fracture is still active or if the malunion is not explicitly documented.