A04UpcomingCategory · further specificity required

Other bacterial intestinal infections

Code-level instructions

Excludes 1

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

Chapters 1 · Inherited instructions

Use additional code

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

Excludes 2 · 5

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Excludes 2

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)

More specific codes

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 difficile A04.8Other specified bacterial intestinal infections A04.9Bacterial intestinal infection, unspecified

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2027

ChangedUnchanged

FY2027UpcomingSelected edition

Effective from 2026-10-01

Inherited rules changed

Other bacterial intestinal infections

Category — select a more specific code

CDC/NCHS · FY2027

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	Inherited rules changed

Code-level instructions

Excludes 1

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

Inherited instructions

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Includes

diseases generally recognized as communicable or transmissible

Excludes 2

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 code

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

More specific codes

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗

References from other codes (1)

M49 · Spondylopathies in diseases classified elsewhere

Code first · enterobacterial infections (A01-A04)

A04UpcomingCategory · further specificity required

Other bacterial intestinal infections

Code-level instructions

Excludes 1

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

Chapters 1 · Inherited instructions

Use additional code

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

Excludes 2 · 5

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Excludes 2

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)

More specific codes

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Official coding guidelines → · CMS ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2027

ChangedUnchanged

FY2027UpcomingSelected edition

Effective from 2026-10-01

Inherited rules changed

Other bacterial intestinal infections

Category — select a more specific code

CDC/NCHS · FY2027

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	Inherited rules changed

Code-level instructions

Excludes 1

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

Inherited instructions

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Includes

diseases generally recognized as communicable or transmissible

Excludes 2

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 code

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

More specific codes

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗

References from other codes (1)

M49 · Spondylopathies in diseases classified elsewhere

Code first · enterobacterial infections (A01-A04)