Nondisp lateral mass fx first cervcal vertebra, init

This code signifies a fracture of the lateral mass of the C1 vertebra (atlas) that has not shifted from its normal anatomical position. It specifically refers to the initial treatment phase for a fracture where the skin remains intact over the injury.

Apply this code for patients presenting with a newly diagnosed, non-displaced fracture of the C1 lateral mass, confirmed by imaging (e.g., X-ray, CT scan). Documentation should clearly state "nondisplaced lateral mass fracture of C1" and "closed fracture" during the initial encounter for treatment.

• Ensure documentation specifies "nondisplaced" and "lateral mass" to differentiate from other C1 fracture types.
• The "A" seventh character indicates the initial encounter for active treatment; use subsequent characters for follow-up care.
• Do not use this code if the fracture is displaced or if it involves other parts of the C1 vertebra (e.g., anterior or posterior arch).