All ICD10 Codes

A04

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Other bacterial intestinal infections

Use a more specific code (9 billable, 1 non-billable)
A04.0Enteropathogenic Escherichia coli infectionA04.1Enterotoxigenic Escherichia coli infectionA04.2Enteroinvasive Escherichia coli infectionA04.3Enterohemorrhagic Escherichia coli infectionA04.4Other intestinal Escherichia coli infectionsA04.5Campylobacter enteritisA04.6Enteritis due to Yersinia enterocoliticaA04.7Enterocolitis due to Clostridium difficilehas subcodesA04.8Other specified bacterial intestinal infectionsA04.9Bacterial intestinal infection, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • 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 Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • bacterial foodborne intoxications, NEC (A05.-)
  • tuberculous enteritis (A18.32)

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
A00-A09Intestinal infectious diseases (A00-A09)
A04Other bacterial intestinal infectionsNot billable
A04.0Enteropathogenic Escherichia coli infectionBillable
A04.1Enterotoxigenic Escherichia coli infectionBillable
A04.2Enteroinvasive Escherichia coli infectionBillable
A04.3Enterohemorrhagic Escherichia coli infectionBillable
A04.4Other intestinal Escherichia coli infectionsBillable
A04.5Campylobacter enteritisBillable
A04.6Enteritis due to Yersinia enterocoliticaBillable
A04.7Enterocolitis due to Clostridium difficileSubcodes
A04.8Other specified bacterial intestinal infectionsBillable
A04.9Bacterial intestinal infection, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A04:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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