2026 ICD-10-CM Diagnosis Code A02.0Salmonella enteritis

ICD-10-CM Codes›A00–B99›A00-A09›A02

ICD-10-CM A02.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A02.0 is a billable ICD-10-CM diagnosis code for Salmonella enteritis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 371 through 373. Coders also document this condition as infection of gastrointestinal tract by Salmonella enterica arizonae. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Intestinal infection.

Code Identity

ICD-10-CM Code
A02.0
Billable Status
Yes — Valid for Submission
Code Describes
Salmonella enteritis
Short Description
Salmonella enteritis
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 CodeA02.0Salmonella enteritis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Infection of gastrointestinal tract by Salmonella enterica arizonae
  • Infection of intestine caused by Salmonella group A
  • Infection of intestine caused by Salmonella group C
  • Infection of intestine caused by Salmonella group D
  • Infection of intestine caused by Salmonella group E
  • Infection of intestine caused by Salmonella group O:4
  • Intestinal infection caused by Arizona group
  • Salmonella enterica arizonae infection
  • Salmonella gastroenteritis
  • Salmonellosis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Salmonellosis

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.

    • Dysentery, dysenteric(catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical)
      • Salmonella
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • aertrycke infection
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • infectious NOS
        • due to
          • Arizona (bacillus)
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • Salmonella, salmonellosis (arizonae) (cholerae-suis) (enteritidis) (typhimurium)
    • Gastroenteritis(acute) (chronic) (noninfectious)
      • Salmonella
    • Infection, infected, infective(opportunistic)
      • Salmonella (aertrycke) (arizonae) (cholerae-suis) (enteritidis) (gallinarum) (suipestifer) (typhimurium)
        • with
          • (gastro)enteritis
    • Intoxication
      • foodborne
        • due to
          • Salmonella
            • with
              • (gastro)enteritis
    • Poisoning(acute)
      • food NEC
        • due to
          • salmonella (aertrycke) (choleraesuis) (enteritidis) (gallinarum) (paratyphi) (suipestifer)
            • with
              • gastroenteritis
    • Salmonellosis

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

  • Salmonellosis

    an intestinal bacterial disease caused by salmonella bacteria.

Patient EducationClinical

Gastroenteritis

Gastroenteritis is an inflammation of the lining of the stomach and intestines. The main symptoms include vomiting and diarrhea. It is usually not serious in healthy people, but it can sometimes lead to dehydration or cause severe symptoms.

The full article covers:

  • What is gastroenteritis?
  • What causes gastroenteritis?
  • What are the symptoms of gastroenteritis?
  • How is gastroenteritis diagnosed?
  • What are the treatments for gastroenteritis?
  • Can gastroenteritis be prevented?

Read the full article at MedlinePlus

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

Convert A02.0 to ICD-9-CMHistory

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

ICD-9-CM
003.0 Salmonella enteritis
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 A02.0Overview

Is A02.0 (Other salmonella infections) a billable code?

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

What MS-DRG does A02.0 group to?

When Salmonella enteritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 371, 372, 373, with relative weights from 0.7274 to 1.7731 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A02.0?

Under the General Equivalence Mappings, Salmonella enteritis converts to ICD-9-CM 003.0 (Salmonella enteritis). 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.