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

This code describes a situation where a patient is receiving follow-up care for a spiral fracture in the shaft of the ulna that has not healed properly (nonunion). The fracture was initially an open fracture of a severe type (IIIA, IIIB, or IIIC), meaning there was significant soft tissue damage and bone exposure. The specific arm affected is not documented.

This code is used when a patient presents for ongoing treatment of a previously diagnosed open spiral ulna shaft fracture that has failed to unite. This includes scenarios such as repeat imaging to assess nonunion, surgical planning for revision surgery, or conservative management of the nonunion. It is appropriate for any subsequent encounter where the nonunion of this specific fracture type is the focus of care.

• Ensure documentation clearly specifies "nonunion" and the initial open fracture type (IIIA, IIIB, or IIIC).
• Verify that the fracture is indeed of the ulna shaft and has a spiral morphology.
• This code is for subsequent encounters; use an initial encounter code for the acute injury.