Pathological fracture, left toe(s), subs for fx w malunion

This code signifies a fracture of the left toe(s) that occurred due to an underlying disease process, rather than trauma. The patient is currently receiving care for this fracture, which has healed improperly, resulting in a malunion.

Apply this code when documentation indicates a left toe fracture caused by a pathological condition (e.g., osteoporosis, tumor), and the patient is being treated for a malunion of this fracture. This code is appropriate for follow-up visits after initial treatment, where the focus is on managing the poorly healed fracture.

• Ensure documentation clearly specifies "pathological fracture" and "malunion" of the left toe(s).
• Always sequence this code after the underlying pathological condition causing the fracture.
• Distinguish from nonunion (M84.478N) or routine healing (M84.478D, M84.478G, M84.478K, M84.478P).