ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.6 > T42.6X > T42.6X5 T42.6X5 Adverse effect of other antiepileptic and sedative-hypnotic drugs Non-Billable/Non-Specific Codes T42.6X5A..., initial encounterT42.6X5D..., subsequent encounterT42.6X5S..., sequela