Disp fx of trapezium, left wrist, subs for fx w nonunion

This code signifies a displaced break in the trapezium bone of the left wrist that has failed to heal properly. The fracture fragments are not in their normal anatomical alignment, and the bone ends have not united after a typical healing period.

This code is appropriate for follow-up encounters where a patient is being treated for a previously diagnosed left trapezium fracture that is now complicated by nonunion. This includes situations where surgical intervention for nonunion is being planned or performed, or when conservative management for nonunion is ongoing.

• Ensure documentation clearly specifies "left" wrist and "displaced" fracture.
• Confirm the encounter is for a subsequent visit related to the nonunion, not the initial injury.
• Always check for laterality (left vs. right) and the specific bone involved (trapezium).