ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.7 > T42.76 T42.76 Underdosing of unspecified antiepileptic and sedative-hypnotic drugs Non-Billable/Non-Specific Codes T42.76XA..., initial encounterT42.76XD..., subsequent encounterT42.76XS..., sequela