2026 ICD-10-CM Diagnosis Code A02.23Salmonella arthritis

ICD-10-CM Codes›A00–B99›A00-A09›A02

ICD-10-CM A02.23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A02.23 is a billable ICD-10-CM diagnosis code for Salmonella arthritis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 548 through 550, 974 through 976. Coders also document this condition as localized Salmonella infection. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Infective arthritis.

Code Identity

ICD-10-CM Code
A02.23
Billable Status
Yes — Valid for Submission
Code Describes
Salmonella arthritis
Short Description
Salmonella arthritis
Same as the full description in the CMS dataset.
Parent Code
A02.2
Localized salmonella infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA02Other salmonella infections
This CodeA02.23Salmonella arthritis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Localized Salmonella infection
  • Salmonella arthritis

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.

    • Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)
      • in (due to)
        • Salmonella (arizonae) (cholerae-suis) (enteritidis) (typhimurium)
    • Infection, infected, infective(opportunistic)
      • Salmonella (aertrycke) (arizonae) (cholerae-suis) (enteritidis) (gallinarum) (suipestifer) (typhimurium)
        • localized
          • arthritis
    • Intoxication
      • foodborne
        • due to
          • Salmonella
            • with
              • localized infection (s)
                • arthritis

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR MUS001
Infective arthritis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Infectious Arthritis

Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Infectious arthritis is an infection in the joint. The infection comes from a bacterial, viral, or fungal infection that spreads from another part of the body. Symptoms of infectious arthritis include:

Read the full article at MedlinePlus

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

Convert A02.23 to ICD-9-CMHistory

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

ICD-9-CM
003.23 Salmonella arthritis
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 A02.23Overview

Is A02.23 (Localized salmonella infections) a billable code?

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

What MS-DRG does A02.23 group to?

When Salmonella arthritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 548, 549, 550, 974, 975, 976, with relative weights from 0.8741 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A02.23?

Under the General Equivalence Mappings, Salmonella arthritis converts to ICD-9-CM 003.23 (Salmonella arthritis). 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.