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

This code signifies a fracture of the trapezium bone in the wrist that has healed improperly, resulting in a malunion. The fracture is displaced, meaning the bone fragments are not in their normal alignment, and the specific wrist (left or right) is not documented. This code is used when the patient is receiving follow-up care for this previously treated but now malunited fracture.

Apply this code when a patient presents for ongoing management or treatment of a trapezium fracture that has healed in an anatomically incorrect position. This would include scenarios such as evaluation for corrective surgery, physical therapy for functional limitations due to the malunion, or pain management related to the improperly healed fracture. It is specifically for subsequent encounters, not the initial treatment of the fracture.

• Ensure documentation clearly states "malunion" and that the fracture is of the trapezium.
• Verify that the encounter is for follow-up care, not the initial treatment of the fracture.
• If the laterality (left or right wrist) is documented, a more specific code should be used.