S12.231 - Unspecified traumatic nondisplaced spondylolisthesis of third cervical vertebra S12.2 - Fracture of third cervical vertebra S12.23 - Unspecified traumatic spondylolisthesis of third cervical vertebra S12.231 - Unspecified traumatic nondisplaced spondylolisthesis of third cervical vertebra