ICD-10-CM Code For Other Bacterial Foodborne Intoxications Not Elsewhere Classified: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A05 includes foodborne bacterial intoxications not classified elsewhere, such as certain Salmonella and Staphylococcus toxin-related illnesses that present with acute gastrointestinal symptoms. These ICD-10-CM diagnosis codes are used to document acute gastroenteritis cases caused by bacterial toxins, capturing severity, complications, and any associated systemic involvement. Accurate coding within the ICD-10-CM A05 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM A05: Other Bacterial Foodborne Intoxications, Not Elsewhere Classified Overview

This group includes diagnoses for bacterial foodborne intoxications that do not fit into other specified categories, primarily affecting the gastrointestinal system. These conditions commonly present with acute gastroenteritis symptoms such as vomiting and diarrhea and can vary in severity. Accurate coding matters for proper reimbursement and to reflect the clinical complexity of care provided.

When to Use

Use a code from this group when a clinician documents a bacterial foodborne intoxication without a more specific ICD-10-CM code or when laboratory identification is nonspecific but the clinical picture indicates a toxin-mediated foodborne illness. These codes apply to acute presentations of vomiting, diarrhea, and systemic symptoms attributed to bacterial toxins when other categories in the classification do not apply.

ICD-10-CM Codes

8 rows

ICD-10-CM Code	Description
A05.0	Foodborne staphylococcal intoxication
A05.1	Botulism food poisoning
A05.2	Foodborne Clostridium perfringens [Clostridium welchii] intoxication
A05.3	Foodborne Vibrio parahaemolyticus intoxication
A05.4	Foodborne Bacillus cereus intoxication
A05.5	Foodborne Vibrio vulnificus intoxication
A05.8	Other specified bacterial foodborne intoxications
A05.9	Bacterial foodborne intoxication, unspecified

DRG Codes

8 rows

DRG Code	Description
371	Major Gastrointestinal Disorders and Peritoneal Infections with MCC
372	Major Gastrointestinal Disorders and Peritoneal Infections with CC
373	Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
391	Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC
392	Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC
867	Other Infectious and Parasitic Diseases Diagnoses with MCC
868	Other Infectious and Parasitic Diseases Diagnoses with CC
869	Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

Typical Clinical Scenarios

An adult presents to the emergency department with acute onset of profuse watery diarrhea, abdominal cramping, fever, and vomiting 12 hours after attending a catered picnic. Stool culture and toxin assays are pending, but the history strongly suggests foodborne bacterial intoxication causing acute gastroenteritis; a code from this group is assigned to capture the presumed bacterial foodborne etiology while awaiting or alongside lab confirmation. Typical codes: A05.0, A05.9
An elderly nursing home resident develops subacute, persistent diarrhea and signs of volume depletion over several days after consuming a contaminated meal; stool testing identifies Clostridium perfringens enterotoxin as the cause. Because this is a foodborne bacterial intoxication producing ongoing symptoms and requiring monitoring and fluid management, a specific code from this group is used to document the identified etiology and guide infection-control measures. Typical codes: A05.2, A05.9
A hospitalized patient with recent foodborne bacterial intoxication is readmitted with sepsis and acute kidney injury after prolonged vomiting and diarrheal losses. The primary problem on admission is systemic complications related to the preceding intestinal infection, so a diagnosis code from this group is included to indicate the antecedent foodborne bacterial intoxication as the source of the complication. Typical codes: A05.4, A05.9

Related Codes

A00-CHOLERA

ICD-10-CM Code For Cholera: Group Overview

A01-TYPHOID-AND-PARATYPHOID-FEVERS

ICD-10-CM Code For Typhoid And Paratyphoid Fevers: Group Overview

A02-OTHER-SALMONELLA-INFECTIONS

ICD-10-CM Code For Other Salmonella Infections: Group Overview

A03-SHIGELLOSIS

ICD-10-CM Code For Shigellosis: Group Overview

A04-OTHER-BACTERIAL-INTESTINAL-INFECTIONS

ICD-10-CM Code For Other Bacterial Intestinal Infections: Group Overview

A06-AMEBIASIS

ICD-10-CM Code For Amebiasis: Group Overview

A07-OTHER-PROTOZOAL-INTESTINAL-DISEASES

ICD-10-CM Code For Other Protozoal Intestinal Diseases: Group Overview

Coming soon

A08-VIRAL-AND-OTHER-SPECIFIED-INTESTINAL-INFECTIONS

ICD-10-CM Code For Viral And Other Specified Intestinal Infections: Group Overview

A09-INFECTIOUS-GASTROENTERITIS-AND-COLITIS

ICD-10-CM Code For Infectious Gastroenteritis And Colitis, Unspecified: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

8 rows

ICD-10-CM Code	Description
A05.0	Foodborne staphylococcal intoxication
A05.1	Botulism food poisoning
A05.2	Foodborne Clostridium perfringens [Clostridium welchii] intoxication
A05.3	Foodborne Vibrio parahaemolyticus intoxication
A05.4	Foodborne Bacillus cereus intoxication
A05.5	Foodborne Vibrio vulnificus intoxication
A05.8	Other specified bacterial foodborne intoxications
A05.9	Bacterial foodborne intoxication, unspecified

DRG Codes

8 rows

DRG Code	Description
371	Major Gastrointestinal Disorders and Peritoneal Infections with MCC
372	Major Gastrointestinal Disorders and Peritoneal Infections with CC
373	Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
391	Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC
392	Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC
867	Other Infectious and Parasitic Diseases Diagnoses with MCC
868	Other Infectious and Parasitic Diseases Diagnoses with CC
869	Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

Typical Clinical Scenarios

An adult presents to the emergency department with acute onset of profuse watery diarrhea, abdominal cramping, fever, and vomiting 12 hours after attending a catered picnic. Stool culture and toxin assays are pending, but the history strongly suggests foodborne bacterial intoxication causing acute gastroenteritis; a code from this group is assigned to capture the presumed bacterial foodborne etiology while awaiting or alongside lab confirmation. Typical codes: A05.0, A05.9
An elderly nursing home resident develops subacute, persistent diarrhea and signs of volume depletion over several days after consuming a contaminated meal; stool testing identifies Clostridium perfringens enterotoxin as the cause. Because this is a foodborne bacterial intoxication producing ongoing symptoms and requiring monitoring and fluid management, a specific code from this group is used to document the identified etiology and guide infection-control measures. Typical codes: A05.2, A05.9
A hospitalized patient with recent foodborne bacterial intoxication is readmitted with sepsis and acute kidney injury after prolonged vomiting and diarrheal losses. The primary problem on admission is systemic complications related to the preceding intestinal infection, so a diagnosis code from this group is included to indicate the antecedent foodborne bacterial intoxication as the source of the complication. Typical codes: A05.4, A05.9

Related Codes

A00-CHOLERA

ICD-10-CM Code For Cholera: Group Overview

A01-TYPHOID-AND-PARATYPHOID-FEVERS

ICD-10-CM Code For Typhoid And Paratyphoid Fevers: Group Overview

A02-OTHER-SALMONELLA-INFECTIONS

ICD-10-CM Code For Other Salmonella Infections: Group Overview

A03-SHIGELLOSIS

ICD-10-CM Code For Shigellosis: Group Overview

A04-OTHER-BACTERIAL-INTESTINAL-INFECTIONS

ICD-10-CM Code For Other Bacterial Intestinal Infections: Group Overview

A06-AMEBIASIS

ICD-10-CM Code For Amebiasis: Group Overview

A07-OTHER-PROTOZOAL-INTESTINAL-DISEASES

ICD-10-CM Code For Other Protozoal Intestinal Diseases: Group Overview

Coming soon

A08-VIRAL-AND-OTHER-SPECIFIED-INTESTINAL-INFECTIONS

ICD-10-CM Code For Viral And Other Specified Intestinal Infections: Group Overview

A09-INFECTIOUS-GASTROENTERITIS-AND-COLITIS

ICD-10-CM Code For Infectious Gastroenteritis And Colitis, Unspecified: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Other Bacterial Foodborne Intoxications Not Elsewhere Classified: Group Overview

Sign up for ICD-10-CM Code For Other Bacterial Foodborne Intoxications Not Elsewhere Classified: Group Overview policy alerts

ICD-10-CM A05: Other Bacterial Foodborne Intoxications, Not Elsewhere Classified Overview

ICD-10-CM Code For Other Bacterial Foodborne Intoxications Not Elsewhere Classified: Group Overview

Sign up for ICD-10-CM Code For Other Bacterial Foodborne Intoxications Not Elsewhere Classified: Group Overview policy alerts

ICD-10-CM A05: Other Bacterial Foodborne Intoxications, Not Elsewhere Classified Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which diagnoses are included in the ICD-10-CM A05 group?

What clinical presentation is typically captured by A05 codes?

How does accurate coding within the A05 group impact reimbursement?

Which DRGs may be relevant when A05 diagnoses are billed?

When should a coder choose `A05.8` versus `A05.9`?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which diagnoses are included in the ICD-10-CM A05 group?

What clinical presentation is typically captured by A05 codes?

How does accurate coding within the A05 group impact reimbursement?

Which DRGs may be relevant when A05 diagnoses are billed?

When should a coder choose `A05.8` versus `A05.9`?

References