Oth fx lower end of right ulna, subs for clos fx w nonunion

This code signifies a fracture of the lower portion of the right ulna that is not specifically classified as another type of lower end ulnar fracture. It indicates that the fracture has failed to heal properly (nonunion) and the patient is presenting for follow-up care, with the skin over the fracture remaining intact.

Use this code for a patient who has previously been diagnosed with an unspecified fracture of the distal right ulna and is now being seen for ongoing management of a documented nonunion. This applies when the fracture site is not exposed to the external environment.

• Ensure documentation clearly specifies "nonunion" and that the fracture is "closed."
• Verify the laterality (right ulna) and the specific location (lower end) are documented.
• Distinguish from malunion, which has a separate code.