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A04 ICD-10-CA category: Other bacterial intestinal infections

A04 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.

Official description

A04

Other bacterial intestinal infections

ICD-10-CA · Canada

Codes in A04

A04 isn’t a code on its own. Open the code that matches what the note documents.

A04.0Enteropathogenic Escherichia coli infectionA04.1Enterotoxigenic Escherichia coli infectionA04.2Enteroinvasive Escherichia coli infectionA04.3Enterohaemorrhagic Escherichia coli infectionA04.4Other intestinal Escherichia coli infectionsA04.5Campylobacter enteritisA04.6Enteritis due to Yersinia enterocoliticaA04.7Enterocolitis due to Clostridium difficileA04.8Other specified bacterial intestinal infectionsA04.9Bacterial intestinal infection, unspecified

Notes for A04

As CIHI prints them, with any note A04 takes from the headings above it.

Includes

  • Diseases generally recognized as communicable or transmissibleFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)

Use additional code

Add a code for this detail when the note documents it.

  • Use additional code (U82-U84) to identify resistance to antimicrobial drugsFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)

Excludes

Conditions classified elsewhere.

  • Foodborne intoxications, elsewhere classified (A05.-)tuberculous enteritis (A18.3)
  • Carrier or suspected carrier of infectious disease (Z22.-)certain localized infections - see body system-related chaptersinfectious and parasitic diseases:• complicating pregnancy, childbirth and the puerperium [except obstetrical tetanus] (O98.-)• specific to the perinatal period [except tetanus neonatorum, whooping cough, congenital syphilis, perinatal gonococcal infection and perinatal human immunodeficiency virus [HIV] disease] (P35-P39)influenza and other acute respiratory infections (J00-J22)From Chapter 1: Certain infectious and parasitic diseases (A00-B99)

Where A04 sits

  1. 1ChapterChapter 1: Certain infectious and parasitic diseases (A00-B99)
  2. 2Block A00-A09Intestinal infectious diseases
  3. 3Category A04Other bacterial intestinal infections

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See A04 in the CIHI source

Frequently asked questions

Is A04 a valid ICD-10-CA code?

No. A04 (Other bacterial intestinal infections) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 10 codes; record the one the documentation supports.

Where is A04 in ICD-10-CA?

A04 sits under A00-A09 Intestinal infectious diseases, within Chapter 1: Certain infectious and parasitic diseases (A00-B99).

What coding notes apply to A04?

ICD-10-CA lists Excludes, Includes, Use additional code notes for A04, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside A04

A00CholeraA01Typhoid and paratyphoid feversA02Other salmonella infectionsA03ShigellosisA05Other bacterial foodborne intoxications, not elsewhere classifiedA06AmoebiasisA07Other protozoal intestinal diseasesA08Viral and other specified intestinal infectionsA09Other gastroenteritis and colitis of infectious and unspecified origin