Displaced comminuted fx shaft of ulna, right arm, sequela

This code signifies a fracture of the ulna's shaft in the right arm that has broken into multiple fragments (comminuted) and where the bone pieces are no longer in their normal alignment (displaced). The "S" at the end indicates that this is a sequela, meaning it's a late effect or complication of the original injury, not the initial acute fracture.

Apply this code when documenting a long-term complication or residual condition directly resulting from a previously sustained displaced comminuted fracture of the right ulnar shaft. This could include chronic pain, malunion, nonunion, or functional limitations that persist after the initial healing period. It is used for encounters where the focus is on the sequela, not the active treatment of the acute fracture.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., M84.2xx for nonunion).
• Ensure documentation clearly states the fracture is "displaced" and "comminuted" and affects the "shaft of the ulna" in the "right arm."
• The "S" seventh character indicates a sequela and should only be used for complications or late effects of the original injury.