Disp fx of trapezium, right wrist, subs for fx w malunion

This code signifies a fracture of the trapezium bone in the right wrist that has healed improperly, resulting in a deformity (malunion). The fracture was initially displaced, meaning the bone fragments were not in their normal alignment. This code is used when the patient is receiving ongoing care for this specific malunited fracture.

Apply this code when a patient presents for follow-up care, rehabilitation, or further surgical intervention related to a previously treated, but now malunited, displaced fracture of the right trapezium. This includes scenarios where the malunion is causing persistent pain, functional limitations, or is being surgically corrected.

• Ensure documentation clearly specifies "malunion" and the right wrist.
• Verify the encounter is "subsequent" for the fracture, not the initial treatment.
• Distinguish from nonunion (failure to heal) or routine follow-up for a properly healed fracture.