Pathological fracture, right ulna, subs for fx w malunion

This code signifies a fracture of the right ulna that occurred due to an underlying disease process, rather than trauma, and is currently being treated for a malunion. A malunion indicates that the fracture has healed, but in an unsatisfactory position or alignment. This code is used during follow-up care for this specific complication.

Use this code when a patient presents for ongoing management or treatment of a right ulnar fracture that was caused by a pathological condition and has healed incorrectly. Documentation should clearly state "pathological fracture," specify the right ulna, and confirm the presence of a malunion during a subsequent encounter.

• Always sequence this code after the underlying pathological condition that caused the fracture.
• Ensure documentation specifies "malunion" and not "nonunion" or "delayed healing," as these have different codes.
• Verify the laterality (right ulna) is explicitly documented to avoid coding errors.