2027 ICD-10-CM Diagnosis Code A05Other bacterial foodborne intoxications, not elsewhere classified

ICD-10-CM Codes›A00–B99›A00-A09›A05

ICD-10-CM A05
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A05 is a non-billable ICD-10-CM category code for other bacterial foodborne intoxications, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A05.0, A05.1, A05.2, and A05.3.

Code Identity

ICD-10-CM Code
A05
Billable Status
No — Non-Billable Category
Code Describes
Other bacterial foodborne intoxications, not elsewhere classified
Short Description
Oth bacterial foodborne intoxications, NEC
Chapter
A00-A09
Intestinal infectious diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA05Other bacterial foodborne intoxications, not elsewhere classified
This CodeA05Other bacterial foodborne intoxications, not elsewhere classified

Specific Coding for Oth bacterial foodborne intoxications, NECOverview

Non-specific codes like A05 require more characters. Use one of these billable codes instead:

  • Use A05.0 for Foodborne staphylococcal intoxication

  • Use A05.1 for Botulism food poisoning

  • Use A05.2 for Foodborne Clostridium perfringens [Clostridium welchii] intoxication

  • Use A05.3 for Foodborne Vibrio parahaemolyticus intoxication

  • Use A05.4 for Foodborne Bacillus cereus intoxication

  • Use A05.5 for Foodborne Vibrio vulnificus intoxication

  • Use A05.8 for Other specified bacterial foodborne intoxications

  • Use A05.9 for Bacterial foodborne intoxication, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A05: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • Clostridium difficile foodborne intoxication and infection (A04.7-)
  • Escherichia coli infection (A04.0-A04.4)
  • listeriosis (A32.-)
  • salmonella foodborne intoxication and infection (A02.-)
  • toxic effect of noxious foodstuffs (T61-T62)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • 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

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name A05, its category, or a range that includes it.

Excludes1 4

These codes carry an Excludes1 note naming A05: they are not reported together with it, unless the two conditions are unrelated.

  • A04 Other bacterial intestinal infections
    bacterial foodborne intoxications, NEC (A05.-)
  • T61 Toxic effect of noxious substances eaten as seafood
    bacterial foodborne intoxications (A05.-)
  • T62 Toxic effect of other noxious substances eaten as food
    bacterial food borne intoxications (A05.-)
  • T78.1 Other adverse food reactions, not elsewhere classified
    bacterial food borne intoxications (A05.-)

Excludes2 2

These codes carry an Excludes2 note naming A05: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block P35-P39 Infections specific to the perinatal period
    intestinal infectious disease (A00-A09) names A00-A09, which includes this code
  • P37 Other congenital infectious and parasitic diseases
    infectious neonatal diarrhea (A00-A09) names A00-A09, which includes this code

Patient EducationClinical

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A05Overview

What is the ICD-10 code for other bacterial foodborne intoxications, not elsewhere classified?

A05 is the ICD-10-CM category for other bacterial foodborne intoxications, not elsewhere classified, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is A05 a billable code?

No. This is a category header that groups the codes for other bacterial foodborne intoxications, not elsewhere classified, and headers cannot be submitted on claims. Claims for other bacterial foodborne intoxications, not elsewhere classified need a more specific code from this category, such as A05.0, A05.1, and A05.2.

Can A05 be reported with a code from A04.7?

Not as a rule. The Excludes1 note on A05 lists "Clostridium difficile foodborne intoxication and infection (A04.7-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).