Oth displaced dens fracture, subs for fx w nonunion

This code signifies a fracture of the dens (odontoid process) of the C2 vertebra that is not in its normal anatomical alignment, and the patient is receiving ongoing treatment for a fracture that has failed to heal properly. The "K" suffix indicates that this is a subsequent encounter for the nonunion.

Apply this code when a patient presents for follow-up care, such as imaging, physical therapy, or surgical planning, for a previously diagnosed displaced dens fracture that has not united. Documentation should clearly state "nonunion" or "failed union" of the dens fracture and confirm the displaced nature of the original injury.

• Ensure documentation specifies "displaced" and "nonunion" for the dens fracture.
• Distinguish from malunion (S12.120P) where the fracture has healed but in an unsatisfactory position.
• Always sequence this code after the primary reason for the encounter if the nonunion is not the sole focus of the visit.