A05.9 Bacterial foodborne intoxication, unspecified

The ICD-10-CM code for Bacterial foodborne intoxication, unspecified is A05.9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A00-A09: Intestinal infectious diseases (A00-A09)

Category A05

9 codes (8 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A05.9:

• Creotoxism
• Kreotoxism
• Indigestion (acid) (bilious) (functional) › due to decomposed food NOS
• Poisoning (acute) › food NEC
• Intoxication › foodborne
• Poisoning (acute) › bacterial toxins
• Poisoning (acute) › kreotoxism, food
• Intoxication › foodborne › bacterial

U.S. Hospital Utilization

• An estimated 7,860 U.S. inpatient stays in 2023 included A05.9 among the documented diagnoses.
• 2,450 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)