ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.9 > T36.91 T36.91 Poisoning by unspecified systemic antibiotic, accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by systemic antibiotic NOS Codes T36.91XA..., initial encounterT36.91XD..., subsequent encounterT36.91XS..., sequela