Path fx in neopltc disease, pelvis, subs for fx w nonunion

This code signifies a pathological fracture of the pelvis that has occurred due to an underlying neoplastic process, and the patient is currently receiving care for a nonunion of this fracture. It indicates a complication of the fracture healing process in the context of cancer.

Apply this code when documentation clearly states a pelvic fracture caused by metastatic disease or primary bone cancer, and the fracture has failed to heal properly, resulting in a nonunion. This code is appropriate for follow-up encounters where the nonunion is being actively managed.

• Ensure documentation specifies the pelvis as the fracture site and explicitly states "nonunion" in the context of a pathological fracture.
• Always sequence the underlying neoplastic disease code first, followed by this code, as the neoplasm is the etiology of the pathological fracture.
• Differentiate from malunion (M84.450K) or routine healing (M84.550P) by confirming the specific nonunion status.