Disp fx of nk of 1st MC bone, r hand, subs for fx w nonunion

This code signifies a fracture of the neck of the first metacarpal (thumb) bone in the right hand that is out of alignment. It specifically indicates that the fracture has not healed properly and the patient is presenting for ongoing care related to this nonunion.

This code is appropriate for follow-up encounters where a patient is being treated for a previously diagnosed displaced fracture of the right first metacarpal neck, and the fracture has failed to unite. This includes visits for evaluation of nonunion, planning for revision surgery, or ongoing conservative management of the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the "right hand" and "first metacarpal neck."
• Verify the fracture is explicitly described as "displaced" to support this specific code.
• Do not use this code for initial encounters or for fractures that are healing normally.