Unsp disp fx of first cervcal vert, subs for fx w nonunion

This code signifies a fracture of the first cervical vertebra (atlas) that has not healed properly, and the bone fragments are not in their anatomical alignment. This specific code is used when the patient is receiving active treatment for the nonunion after the initial treatment of the fracture.

Apply this code for patients presenting for ongoing management of an unhealed, displaced atlas fracture. Documentation should clearly indicate a nonunion of the fracture and that the patient is in a subsequent phase of care, such as follow-up appointments, cast changes, or further surgical intervention for the nonunion.

• Ensure documentation specifies "nonunion" and "displaced" for the first cervical vertebra.
• Confirm the encounter is for subsequent care, not the initial treatment or sequelae.
• Do not confuse with malunion (S12.000P) or routine follow-up after successful healing.