Displ spiral fx shaft of ulna, unsp arm, 7thN

This code signifies a complex injury involving a spiral fracture of the ulna shaft that is no longer in its anatomical alignment. The fracture has broken through the skin (open fracture type IIIA, IIIB, or IIIC) and is failing to heal properly, indicating a nonunion. This specific code is used when the patient is receiving follow-up care for this ongoing healing complication.

Use this code for a patient presenting for subsequent treatment of a previously diagnosed open spiral ulna shaft fracture (types IIIA, IIIB, or IIIC) that has developed a nonunion. This would apply during clinic visits, hospital admissions, or surgical encounters focused on managing the nonunion after initial treatment.

• Ensure documentation clearly specifies "nonunion" and the open fracture type (IIIA, IIIB, or IIIC).
• Verify this is a subsequent encounter for the nonunion, not the initial treatment of the fracture.
• Laterality is unspecified for this code; if laterality is known, a more specific code should be selected.