ICD-10-CM > S00-T88 > S10-S19 > S13 > S13.1 > S13.13 S13.13 Subluxation and dislocation of C2/C3 cervical vertebrae Non-Billable/Non-Specific Codes S13.130Subluxation of C2/C3 cervical vertebraeS13.130A..., initial encounterS13.130D..., subsequent encounterS13.130S..., sequelaS13.131Dislocation of C2/C3 cervical vertebraeS13.131A..., initial encounterS13.131D..., subsequent encounterS13.131S..., sequela