A04 Other bacterial intestinal infections

Not billable (header)Chapter 1

Report one of the more specific codes below.

Check coverage with this diagnosis

Codes under this one

A04.0 Enteropathogenic Escherichia coli infection
A04.1 Enterotoxigenic Escherichia coli infection
A04.2 Enteroinvasive Escherichia coli infection
A04.3 Enterohemorrhagic Escherichia coli infection
A04.4 Other intestinal Escherichia coli infections
A04.5 Campylobacter enteritis
A04.6 Enteritis due to Yersinia enterocolitica
A04.7 Enterocolitis due to Clostridium difficileHeader
A04.8 Other specified bacterial intestinal infections
A04.9 Bacterial intestinal infection, unspecified

Instructional notes

Chapter 1

Excludes2Not included here: the patient may have both; report both when both are present.

carrier or suspected carrier of infectious disease (Z22.-)
certain localized infections - see body system-related chapters
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
infectious and parasitic diseases specific to the perinatal period (P35-P39)
influenza and other acute respiratory infections (J00-J22)

Use additional codeAdd a second code for the full picture.

code to identify resistance to antimicrobial drugs (Z16.-)

Includes

diseases generally recognized as communicable or transmissible

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

bacterial foodborne intoxications, NEC (A05.-)
tuberculous enteritis (A18.32)

Chapter 1: Certain infectious and parasitic diseases · A00-A09 Intestinal infectious diseases (A00-A09)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.