Displ commnt fx shaft of ulna, unsp arm, 7thR

This code signifies a complex injury involving a comminuted fracture of the ulna's shaft, where the bone fragments are displaced. It specifically indicates an open fracture (Type IIIA, IIIB, or IIIC) that has previously been treated but has now healed in an unsatisfactory position (malunion). The injury location is unspecified for the arm.

This code is appropriate for documenting follow-up care for a patient who sustained an open, comminuted, displaced ulnar shaft fracture that has resulted in malunion. This would include encounters for assessment, management, or surgical intervention related to the malunion itself, after the initial treatment of the acute fracture.

• Ensure documentation clearly specifies "malunion" and the "subsequent encounter" for this specific type of open fracture.
• Verify the fracture is indeed comminuted and displaced, and that the ulna shaft is the affected bone.
• Do not use for initial treatment of the acute fracture or for nonunion; separate codes exist for those scenarios.