Displaced lateral mass fx first cervcal vertebra, init

This code signifies a fracture of the lateral mass of the C1 vertebra (atlas) that has shifted from its normal anatomical position. It specifically indicates that the fracture is closed, meaning the skin remains intact over the injury. This injury typically results from significant axial loading or hyperextension forces.

Apply this code when documentation confirms a displaced fracture of the C1 lateral mass, and the patient is receiving initial treatment for the injury. Imaging reports (X-ray, CT scan) detailing the displacement and location of the fracture, along with physician notes confirming the closed nature of the injury, support its use.

• Ensure documentation explicitly states "displaced" for the lateral mass fracture; otherwise, an unspecified displacement code may be more appropriate.
• The "A" seventh character indicates an initial encounter, used for the entire period a patient is receiving active treatment for the injury.
• Differentiate from other C1 fracture types (e.g., Jefferson fracture, anterior/posterior arch fractures) based on precise anatomical location.