S12.33 - Unspecified traumatic spondylolisthesis of fourth cervical vertebra S12.3 - Fracture of fourth cervical vertebra S12.33 - Unspecified traumatic spondylolisthesis of fourth cervical vertebra S12.330 - Unspecified traumatic displaced spondylolisthesis of fourth cervical vertebra S12.331 - Unspecified traumatic nondisplaced spondylolisthesis of fourth cervical vertebra