T37Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics

T37 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics. It belongs to 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 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: T37.0 (sulfonamides), T37.1 (drugs), T37.2 (protozoa), T37.3 (drugs), T37.4 (anthelminthics), T37.5 (drugs), T37.8 (antiparasitics) and T37.9 (antiparasitics).

Don't report T37 together with the conditions in its Excludes1 note: anti-infectives topically used for ear, nose and throat (T49.6-), anti-infectives topically used for eye (T49.5-) and locally applied anti-infectives NEC (T49.0-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2019 (title revised).