ICD-10-CM > S00-T88 > S10-S19 > S13 > S13.1 > S13.15 > S13.150 S13.150 Subluxation of C4/C5 cervical vertebrae Non-Billable/Non-Specific Codes S13.150A..., initial encounterS13.150D..., subsequent encounterS13.150S..., sequela