ICD-10-CM > S00-T88 > S10-S19 > S13 > S13.1 > S13.10 > S13.100 S13.100 Subluxation of unspecified cervical vertebrae Non-Billable/Non-Specific Codes S13.100A..., initial encounterS13.100D..., subsequent encounterS13.100S..., sequela