Stress fracture, left foot, subs for fx w malunion

This code signifies a stress fracture located in the left foot that has previously been treated but has healed improperly, resulting in a malunion. The patient is currently receiving active treatment for this malunited stress fracture.

Apply this code when documentation indicates a patient is presenting for ongoing care of a stress fracture in the left foot that has healed in a misaligned or deformed position. This code is appropriate for follow-up visits, physical therapy, or surgical intervention aimed at correcting the malunion.

• Requires documentation of a prior stress fracture in the left foot and current treatment for its malunion.
• Distinguish from nonunion (M84.375N) where the fracture has not healed at all.
• Always sequence after the primary reason for the encounter if the malunion is a secondary issue.