S12.15 - Other traumatic spondylolisthesis of second cervical vertebra S12.1 - Fracture 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