Oth nondisp fx of first cervcal vert, subs for fx w nonunion

This code signifies a non-displaced fracture of the atlas (first cervical vertebra) that has failed to heal properly after initial treatment. The patient is in a subsequent phase of care, and the fracture site shows evidence of nonunion, meaning the bone fragments have not fused together.

Apply this code when a patient presents for ongoing management of a previously diagnosed, non-displaced C1 fracture that has not united. Documentation should clearly state "nonunion" or "failed healing" of the first cervical vertebra fracture, along with the "subsequent encounter" status. This code is appropriate for follow-up visits, imaging studies to assess nonunion, or planning for further intervention.

• Ensure documentation explicitly states "nonunion" and "nondisplaced" for the first cervical vertebra.
• Verify the encounter is "subsequent" and not an initial treatment for the fracture.
• Differentiate from malunion (S12.091P) where the fracture has healed in an incorrect anatomical position.