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

This code signifies a complex, displaced fracture involving a segment of the ulna's shaft, where the arm is not specified. It specifically indicates a subsequent encounter for an open fracture (Type IIIA, IIIB, or IIIC) that has failed to heal properly, resulting in nonunion. This implies a persistent gap or lack of bone fusion at the fracture site after an extended period.

Use this code when documenting follow-up care for a patient with a previously treated open segmental ulna shaft fracture that has developed nonunion. This applies to situations where the initial injury was severe, involving significant soft tissue damage and bone exposure. It is appropriate for ongoing management of the nonunion, such as surgical intervention or prolonged conservative treatment.

• Ensure documentation clearly specifies "nonunion" and the "subsequent encounter" status.
• Verify the original open fracture type (IIIA, IIIB, or IIIC) was previously documented.
• Do not use for initial encounters or for fractures that are healing normally.