Pathological fracture, left ankle, subs for fx w malunion

This code signifies a fracture of the left ankle that occurred due to a pre-existing disease (e.g., osteoporosis, tumor), and the fracture has healed in an unsatisfactory position, requiring ongoing treatment. It indicates a follow-up encounter for the management of this malunited pathological fracture.

Use this code for patients presenting for evaluation or treatment of a left ankle pathological fracture that has previously been treated but has healed with malunion. Documentation should clearly state "pathological fracture," specify the left ankle, confirm malunion, and indicate that the patient is in a subsequent phase of care for this specific fracture.

• Ensure documentation explicitly states "pathological fracture" and the specific ankle (left).
• Distinguish from nonunion (M84.472N) or routine follow-up for a healed fracture without malunion.
• Always sequence this code after the underlying disease causing the pathological fracture, if applicable and still active.