ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.0 > T36.0X > T36.0X4 T36.0X4 Poisoning by penicillins, undetermined Non-Billable/Non-Specific Codes T36.0X4A..., initial encounterT36.0X4D..., subsequent encounterT36.0X4S..., sequela