ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.Z > T50.Z9 > T50.Z91 T50.Z91 Poisoning by other vaccines and biological substances, accidental (unintentional) Non-Billable/Non-Specific Codes T50.Z91A..., initial encounterT50.Z91D..., subsequent encounterT50.Z91S..., sequela