ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.9 > T40.90 > T40.901 T40.901 Poisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional) Non-Billable/Non-Specific Codes T40.901A..., initial encounterT40.901D..., subsequent encounterT40.901S..., sequela