Displaced segmental fx shaft of ulna, unsp arm, sequela

This code signifies a long-term complication or late effect stemming from a previous injury involving a break in the shaft of the ulna, where the bone fragments were not properly aligned. The fracture affected a segment of the bone, and the specific arm (left or right) is not documented.

Use this code when documenting a patient presenting with ongoing issues, such as pain, deformity, nonunion, malunion, or functional limitations, that are directly attributable to a past displaced segmental fracture of the ulnar shaft. This code is appropriate when the initial acute injury has healed, but its residual effects are still being managed.

• Always use this "S" seventh character for sequela when the patient is seen for a complication or late effect of the original injury.
• Ensure documentation clearly links the current condition to the previous ulnar shaft fracture.
• If the specific arm is known, a more precise code without "unspecified arm" should be used.