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

This code describes a fracture in the upper portion of the right ulna, excluding the olecranon or coronoid process, that has failed to heal properly after initial treatment. The fracture is currently closed, meaning the skin remains intact over the injury site, but the bone fragments have not united. This indicates a complication in the healing process requiring further intervention.

Use this code for follow-up encounters where a patient is receiving ongoing treatment for a previously diagnosed closed fracture of the proximal right ulna that has developed a nonunion. This applies when the nonunion is confirmed, and the patient is undergoing management such as revision surgery, bone grafting, or prolonged immobilization to promote healing.

• Ensure documentation clearly specifies "nonunion" and that the fracture is closed.
• Verify the laterality is "right" and the fracture location is the "upper end of ulna" but not the olecranon or coronoid process.
• Confirm this is a subsequent encounter for the fracture, not the initial treatment.