ICD-10-CM > S00-T88 > S10-S19 > S13 > S13.1 > S13.17 > S13.171 S13.171 Dislocation of C6/C7 cervical vertebrae Non-Billable/Non-Specific Codes S13.171A..., initial encounterS13.171D..., subsequent encounterS13.171S..., sequela