Stress fracture, unsp femur, subs for fx w malunion

This code signifies a stress fracture of an unspecified femur that has previously been treated but has healed improperly, resulting in a malunion. The patient is currently receiving routine care during the healing or recovery phase of this complicated fracture.

Apply this code when documentation indicates a stress fracture of the femur (without specifying left or right) that has healed in a misaligned or deformed position, and the patient is presenting for follow-up care, cast changes, or medication management related to this malunion. Supporting documentation should clearly state "malunion" and "subsequent encounter."

• Ensure the documentation specifies "stress fracture" and "malunion" for accurate code assignment.
• Distinguish from nonunion (M84.353N) where the fracture has failed to heal completely.
• Confirm the encounter type is "subsequent" and not initial or sequela.