Path fx in neopltc disease, r femur, subs for fx w nonunion

This code signifies a fracture of the right femur that occurred due to an underlying neoplastic process, such as a tumor or metastatic disease, and has failed to heal properly. The patient is receiving ongoing care for this unhealed fracture.

Apply this code when a patient presents for follow-up treatment of a right femoral pathological fracture caused by cancer, and the fracture has not united. Documentation should clearly state "nonunion" and specify the right femur as the affected bone, with the fracture being secondary to a neoplastic condition. This code is used for subsequent encounters after the initial treatment of the fracture.

• Always sequence the underlying neoplasm code first, followed by this code.
• Ensure documentation explicitly states "nonunion" and specifies the right femur.
• Distinguish from M84.551P (malunion) or M84.551S (sequela) for different healing outcomes.