Path fracture in oth disease, r ulna, subs for fx w nonunion

This code signifies a fracture of the right ulna that occurred due to an underlying disease process, rather than trauma. The fracture has failed to heal properly, resulting in a nonunion, and the patient is presenting for follow-up care or treatment related to this unhealed fracture.

Apply this code for patients with a documented right ulnar fracture secondary to a systemic condition (e.g., osteoporosis, bone tumor, metabolic bone disease) who are returning for ongoing management of the nonunion. Documentation should clearly state the pathological nature of the fracture, the specific bone involved, and the nonunion status during a subsequent encounter.

• Always sequence the underlying disease causing the pathological fracture first.
• Distinguish carefully between pathological fractures and traumatic fractures; the etiology is key.
• Ensure documentation specifies "nonunion" and not just "delayed healing" for accurate code assignment.