T37.9

ICD-10Non-billable category

Unsp systemic anti-infective and antiparasitics

Official ICD-10-CM descriptor (FY2026)

Poisoning by, adverse effect of and underdosing of unspecified systemic anti-infective and antiparasitics

T37.9 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.

ICD-10-CM FY2026 defines 6 codes beneath T37.9. See the ICD-10-CM index for what this site publishes.

Related codes in T37

Where this code sits

Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
Parent code: T37

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Source

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.