ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.3 > T42.3X > T42.3X1 T42.3X1 Poisoning by barbiturates, accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by barbiturates NOS Codes T42.3X1A..., initial encounterT42.3X1D..., subsequent encounterT42.3X1S..., sequela