Path fx in oth disease, hip, unsp, subs for fx w malunion

This code signifies a pathological fracture of the hip that has healed improperly (malunion) due to an underlying systemic disease, rather than trauma. It indicates that the patient is receiving ongoing care for this specific complication of the fracture.

Use this code for patients presenting for follow-up care, rehabilitation, or further treatment of a hip fracture that has healed with malunion, where the fracture was caused by a pre-existing disease (e.g., osteoporosis, metastatic cancer). Documentation should clearly state the pathological nature of the fracture, its location in the hip, the presence of malunion, and that it's a subsequent encounter.

• Always sequence the underlying disease causing the pathological fracture first.
• Ensure documentation specifies "malunion" and not "nonunion" (M84.4-) or "delayed healing" (M84.2-).
• Verify the encounter type is "subsequent" (P) for ongoing care, not initial (A) or sequela (S).