Displaced segmental fx shaft of ulna, unsp arm, init

This code signifies a break in the ulna bone, specifically within the shaft, where the bone fragments are no longer aligned (displaced) and there are at least two fracture lines creating a segment. This injury affects an unspecified arm and is being treated for the first time as a closed fracture, meaning the skin is intact.

Apply this code when documentation clearly indicates a segmental fracture of the ulnar shaft with displacement, and the patient is presenting for initial treatment of this injury. This is appropriate for cases where the specific arm (left or right) is not yet determined or documented.

• Ensure "segmental" and "displaced" are explicitly documented for the ulnar shaft fracture.
• Confirm the encounter is for initial treatment and the fracture is closed.
• If the arm (left or right) is specified, a more specific code should be used.