2026 ICD-10-CM Diagnosis Code A02.9Salmonella infection, unspecified

ICD-10-CM Codes›A00–B99›A00-A09›A02

ICD-10-CM A02.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A02.9 is a billable ICD-10-CM diagnosis code for Salmonella infection, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869, 974 through 976. Coders also document this condition as infection caused by Salmonella co-occurrent with human immunodeficiency virus infection. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Intestinal infection.

Code Identity

ICD-10-CM Code
A02.9
Billable Status
Yes — Valid for Submission
Code Describes
Salmonella infection, unspecified
Short Description
Salmonella infection, unspecified
Same as the full description in the CMS dataset.
Parent Code
A02
Other salmonella infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA02Other salmonella infections
This CodeA02.9Salmonella infection, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Infection caused by Salmonella co-occurrent with human immunodeficiency virus infection
  • Salmonella Ebrie or Salmonella Monschaui
  • Salmonella food poisoning
  • Salmonella infection
  • Salmonella infection with AIDS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Infection, infected, infective(opportunistic)
      • Salmonella (aertrycke) (arizonae) (cholerae-suis) (enteritidis) (gallinarum) (suipestifer) (typhimurium)
    • Infection, infected, infective(opportunistic)
      • Salmonella (aertrycke) (arizonae) (cholerae-suis) (enteritidis) (gallinarum) (suipestifer) (typhimurium)
        • due to food (poisoning)
    • Intoxication
      • foodborne
        • due to
          • Salmonella
    • Poisoning(acute)
      • Bacillus B (aertrycke) (cholerae (suis)) (paratyphosus) (suipestifer)
    • Poisoning(acute)
      • food NEC
        • due to
          • Bacillus (aertrycke) (choleraesuis) (paratyphosus) (suipestifer)
    • Poisoning(acute)
      • food NEC
        • due to
          • salmonella (aertrycke) (choleraesuis) (enteritidis) (gallinarum) (paratyphi) (suipestifer)
    • Poisoning(acute)
      • Salmonella (arizonae) (cholerae-suis) (enteritidis) (typhimurium)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR DIG001
Intestinal infection
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Salmonella Food Poisoning

    poisoning caused by ingestion of food harboring species of salmonella. conditions of raising, shipping, slaughtering, and marketing of domestic animals contribute to the spread of this bacterium in the food supply.

  • Salmonella

    a genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that utilizes citrate as a sole carbon source. it is pathogenic for humans, causing enteric fevers, gastroenteritis, and bacteremia. food poisoning is the most common clinical manifestation. organisms within this genus are separated on the basis of antigenic characteristics, sugar fermentation patterns, and bacteriophage susceptibility.

Patient EducationClinical

Salmonella Infections

Salmonella is the name of a group of bacteria. In the United States, it is a common cause of foodborne illness. Salmonella occurs in raw poultry, eggs, beef, and sometimes on unwashed fruit and vegetables. You also can get infected after handling pets, especially reptiles like snakes, turtles, and lizards.

Read the full article at MedlinePlus

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

Convert A02.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
003.9 Salmonella infection NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A02.9Overview

Is A02.9 (Other salmonella infections) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Salmonella infection, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does A02.9 group to?

When Salmonella infection, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, 974, 975, 976, with relative weights from 0.7297 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A02.9?

Under the General Equivalence Mappings, Salmonella infection, unspecified converts to ICD-9-CM 003.9 (Salmonella infection NOS). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.