ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.1 > T36.1X > T36.1X4 T36.1X4 Poisoning by cephalosporins and other beta-lactam antibiotics, undetermined Non-Billable/Non-Specific Codes T36.1X4A..., initial encounterT36.1X4D..., subsequent encounterT36.1X4S..., sequela