ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.B > T50.B1 > T50.B11 T50.B11 Poisoning by smallpox vaccines, accidental (unintentional) Non-Billable/Non-Specific Codes T50.B11A..., initial encounterT50.B11D..., subsequent encounterT50.B11S..., sequela