Path fx in oth disease, r tibia, subs for fx w nonunion

This code signifies a fracture of the right tibia that occurred due to an underlying disease process, rather than trauma, and is currently experiencing a failure of bone healing (nonunion). The patient is in a subsequent phase of care for this specific fracture.

Use this code for follow-up encounters where a patient with a pathological fracture of the right tibia, caused by a condition like osteoporosis, bone tumor, or metabolic bone disease, is being treated for a documented nonunion. Documentation should clearly state the pathological nature of the fracture, its location, and the ongoing nonunion status.

• Ensure documentation specifies the underlying disease causing the pathological fracture.
• Distinguish from malunion (M84.461K) or routine healing (M84.561K) for subsequent encounters.
• Always sequence the underlying disease code first, followed by this pathological fracture code.