Oth disp fx of first cervical vertebra, init for clos fx

This code signifies a fracture of the atlas (first cervical vertebra) that is not in its normal anatomical alignment, and is not further specified as a burst, Jefferson, or other specific type. The fracture is closed, meaning there is no open wound communicating with the fracture site. This code is used for the initial treatment phase of the injury.

Apply this code when a patient presents with a newly diagnosed, displaced fracture of the C1 vertebra that is not otherwise classified. Documentation should clearly state "displaced C1 fracture," "atlas fracture, displaced," or similar, and confirm it is a closed injury. This code is appropriate for the initial encounter for management of the acute fracture.

• Ensure documentation specifies "displaced" to differentiate from non-displaced fractures.
• Verify the encounter is for the initial treatment; subsequent care will use different encounter codes (D or S).
• Distinguish from specific C1 fracture types like Jefferson (S12.03XA) or burst (S12.04XA) if documented.