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031 Nondisplaced posterior arch fracture of first cervical vertebra

S12.04 Lateral mass fracture of first cervical vertebra
S12.040 Displaced lateral mass fracture of first cervical vertebra
S12.041 Nondisplaced lateral mass fracture of first cervical vertebra
S12.09 Other fracture of first cervical vertebra
S12.090 Other displaced fracture of first cervical vertebra
S12.091 Other nondisplaced fracture of first cervical vertebra
S12.1 Fracture of second cervical vertebra
Axis
S12.10 Unspecified fracture of second cervical vertebra
S12.100 Unspecified displaced fracture of second cervical vertebra
S12.101 Unspecified nondisplaced fracture of second cervical vertebra
S12.11 Type II dens fracture
S12.110 Anterior displaced Type II dens fracture
S12.111 Posterior displaced Type II dens fracture
S12.112 Nondisplaced Type II dens fracture
S12.12 Other dens fracture
S12.120 Other displaced dens fracture
S12.121 Other nondisplaced dens fracture
S12.13 Unspecified traumatic spondylolisthesis of second cervical vertebra
S12.130 Unspecified traumatic displaced spondylolisthesis of second cervical vertebra
S12.131 Unspecified traumatic nondisplaced spondylolisthesis of second cervical vertebra
S12.14 Type III traumatic spondylolisthesis of second cervical vertebra
S12.15 Other traumatic spondylolisthesis of second cervical vertebra
S12.150 Other traumatic displaced spondylolisthesis of second cervical vertebra
S12.151 Other traumatic nondisplaced spondylolisthesis of second cervical vertebra
S12.