T36.1X4 - Poisoning by cephalosporins and other beta-lactam antibiotics, undetermined T36.1 - Poisoning by, adverse effect of and underdosing of cephalosporins and other beta-lactam antibiotics T36.1X - Poisoning by, adverse effect of and underdosing of cephalosporins and other beta-lactam antibiotics T36.1X4 - Poisoning by cephalosporins and other beta-lactam antibiotics, undetermined