Path fx in oth disease, l fibula, subs for fx w malunion

This code signifies a fracture of the left fibula that occurred due to an underlying disease process, not trauma, and is currently being treated for a malunion. A malunion indicates that the fracture has healed, but in an unsatisfactory position or alignment, potentially causing functional impairment.

Apply this code when a patient presents for follow-up care, such as casting, bracing, physical therapy, or surgical intervention, for a left fibular pathological fracture that has healed incorrectly. Documentation should clearly state "pathological fracture," specify the left fibula, and indicate "malunion" during a subsequent encounter.

• Always sequence the underlying disease causing the pathological fracture first, if known and still active.
• Distinguish between nonunion (failure to heal) and malunion (healed incorrectly); this code is specific to malunion.
• Ensure documentation specifies "subsequent encounter" for appropriate seventh character selection.