ICD-10-CM 2027
ICD-10 code for foodborne intoxication
From the official ICD-10-CM alphabetic index entry “Intoxication › foodborne”. Page updated September 29, 2026.
About coding foodborne intoxication
The ICD-10-CM code for foodborne intoxication is A05.9 (Bacterial foodborne intoxication, unspecified). The official index lists 23 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A05.9.
Within A05, choose A05.9 (Bacterial foodborne intoxication, unspecified) only when documentation doesn't support a more specific option: foodborne staphylococcal intoxication (A05.0), botulism food poisoning (A05.1), foodborne Clostridium perfringens [Clostridium welchii] intoxication (A05.2), foodborne Vibrio parahaemolyticus intoxication (A05.3), foodborne Bacillus cereus intoxication (A05.4), foodborne Vibrio vulnificus intoxication (A05.5) and other specified bacterial foodborne intoxications (A05.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific foodborne intoxication codes (official index)
- bacterial A05.9 — Bacterial foodborne intoxication, unspecified
- classical (Clostridium botulinum) A05.1 — Botulism food poisoning
- due to
- Bacillus cereus A05.4 — Foodborne Bacillus cereus intoxication
- bacterium A05.9 — Bacterial foodborne intoxication, unspecified
- specified NEC A05.8 — Other specified bacterial foodborne intoxications
- Clostridium
- botulinum A05.1 — Botulism food poisoning
- perfringens A05.2 — Foodborne Clostridium perfringens [Clostridium welchii] intoxication
- welchii A05.2 — Foodborne Clostridium perfringens [Clostridium welchii] intoxication
- Salmonella A02.9 — Salmonella infection, unspecified
- with
- (gastro)enteritis A02.0 — Salmonella enteritis
- localized infection (s) A02.20 — Localized salmonella infection, unspecified
- arthritis A02.23 — Salmonella arthritis
- meningitis A02.21 — Salmonella meningitis
- osteomyelitis A02.24 — Salmonella osteomyelitis
- pneumonia A02.22 — Salmonella pneumonia
- pyelonephritis A02.25 — Salmonella pyelonephritis
- specified NEC A02.29 — Salmonella with other localized infection
- sepsis A02.1 — Salmonella sepsis
- specified manifestation NEC A02.8 — Other specified salmonella infections
- Staphylococcus A05.0 — Foodborne staphylococcal intoxication
- Vibrio
- parahaemolyticus A05.3 — Foodborne Vibrio parahaemolyticus intoxication
- vulnificus A05.5 — Foodborne Vibrio vulnificus intoxication
- enterotoxin, staphylococcal A05.0 — Foodborne staphylococcal intoxication
- noxious
Common questions about foodborne intoxication ICD-10 codes
What is the ICD-10 code for foodborne intoxication?
- A05.9 — Bacterial foodborne intoxication, unspecified. More specific codes apply when the documentation supports them: A05.9, A05.1, A05.4, A05.9 and others below.
What is the ICD-10 code for bacterial foodborne intoxication?
- A05.9 — Bacterial foodborne intoxication, unspecified.
What is the ICD-10 code for classical foodborne intoxication?
- A05.1 — Botulism food poisoning.
Is A05.9 billable?
- Yes. A05.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A05.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A05.9 as a principal diagnosis.
Is A05.9 a CC or MCC?
- No. A05.9 is neither a CC nor an MCC under MS-DRG v44.0.