ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.9 > T40.90 > T40.905 T40.905 Adverse effect of unspecified psychodysleptics [hallucinogens] Non-Billable/Non-Specific Codes T40.905A..., initial encounterT40.905D..., subsequent encounterT40.905S..., sequela