Nondisp fx of trapezium, left wrist, subs for fx w malunion

This code signifies a malunion of a previously sustained, nondisplaced fracture of the trapezium bone in the left wrist. Malunion indicates that the fracture has healed, but in an anatomically incorrect or functionally impaired position, which can lead to ongoing pain or limited range of motion.

Use this code for patients presenting with a healed, but improperly aligned, nondisplaced trapezium fracture of the left wrist, where the encounter is specifically for managing this malunion. This would apply when a physician is evaluating the malunion, planning corrective surgery, or managing symptoms related to the improper healing.

• Ensure documentation clearly specifies "malunion" and not "nonunion" or "delayed healing."
• Verify the fracture was initially nondisplaced and located in the left trapezium.
• Confirm this is a subsequent encounter for the fracture, not the initial treatment.