T36.1X6Underdosing of cephalosporins and other beta-lactam antibiotics

T36.1X6 is the ICD-10-CM diagnosis code for underdosing of cephalosporins and other beta-lactam antibiotics. It belongs to category T36 (poisoning by, adverse effect of and underdosing of systemic antibiotics), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T36.1X, choose T36.1X6 (Underdosing of cephalosporins and other beta-lactam antibiotics) only when documentation doesn't support a more specific option: poisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional) (T36.1X1), poisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harm (T36.1X2), poisoning by cephalosporins and other beta-lactam antibiotics, assault (T36.1X3), poisoning by cephalosporins and other beta-lactam antibiotics, undetermined (T36.1X4) and adverse effect of cephalosporins and other beta-lactam antibiotics (T36.1X5).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.