A04
ICD-10Non-billable categoryOther bacterial intestinal infections
Official ICD-10-CM descriptor (FY2026)
Other bacterial intestinal infections
A04 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.
- bacterial foodborne intoxications, NEC (A05.-)
- tuberculous enteritis (A18.32)
More specific codes under A04
- A04.0Enteropathogenic Escherichia coli infection
- A04.1Enterotoxigenic Escherichia coli infection
- A04.2Enteroinvasive Escherichia coli infection
- A04.3Enterohemorrhagic Escherichia coli infection
- A04.4Other intestinal Escherichia coli infections
- A04.5Campylobacter enteritis
- A04.6Enteritis due to Yersinia enterocolitica
- A04.7Enterocolitis due to Clostridium difficilecategory
- A04.8Other specified bacterial intestinal infections
- A04.9Bacterial intestinal infection, unspecified
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.