Displaced segmental fx shaft of ulna, left arm, sequela

This code describes a long-term complication or late effect resulting from a displaced fracture of the shaft of the ulna in the left arm, where the bone broke into three or more pieces. This indicates that the initial injury has healed, but residual issues related to the fracture persist.

Use this code when documenting conditions such as malunion, nonunion, chronic pain, deformity, or restricted range of motion in the left forearm, specifically identified as a consequence of a previously sustained segmental ulna shaft fracture. This applies when the patient is presenting for treatment of these persistent issues, not the acute fracture itself.

• Always sequence this sequela code after the code for the specific late effect or complication being treated (e.g., M84.422A for malunion).
• Ensure documentation clearly links the current condition to the previous segmental ulna shaft fracture.
• Verify the fracture was indeed displaced and segmental, and located in the shaft of the ulna, left arm.