T37
ICD-10Non-billable categoryOther systemic anti-infectives and antiparasitics
Official ICD-10-CM descriptor (FY2026)
Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics
T37 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- anti-infectives topically used for ear, nose and throat (T49.6-)
- anti-infectives topically used for eye (T49.5-)
- locally applied anti-infectives NEC (T49.0-)
7th character
- The appropriate 7th character is to be added to each code from category T37
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under T37
- T37.0Sulfonamidescategory
- T37.1Antimycobacterial drugscategory
- T37.2Antimalarials and drugs acting on bld protzoacategory
- T37.3Antiprotozoal drugscategory
- T37.4Anthelminthicscategory
- T37.5Antiviral drugscategory
- T37.8Systemic anti-infectives and antiparasiticscategory
- T37.9Unsp systemic anti-infective and antiparasiticscategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.