Oth fx low end r ulna, 7thN

This code signifies a fracture of the lower end of the right ulna, other than a Salter-Harris or physeal fracture, that is currently failing to heal after an initial open fracture classified as Type IIIA, IIIB, or IIIC. Nonunion indicates that the bone ends have not united and are not expected to heal without further intervention, despite previous treatment for a severe open fracture.

Apply this code when documenting a patient presenting with a previously diagnosed open fracture of the distal right ulna (specifically Gustilo-Anderson Type IIIA, IIIB, or IIIC) that has progressed to nonunion. This is used during subsequent encounters for ongoing management of the nonunion, such as surgical planning for bone grafting or internal fixation.

• Ensure documentation clearly specifies "nonunion" and the original open fracture type (IIIA, IIIB, or IIIC) for the right ulna.
• This code is for subsequent encounters; an initial encounter for the fracture would use a different code.
• Verify the fracture location is specifically the "lower end" of the ulna and not another part of the bone.