2026 ICD-10-CM Diagnosis Code A39.83Meningococcal arthritis

ICD-10-CM Codes›A00–B99›A30-A49›A39

ICD-10-CM A39.83
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A39.83 is a billable ICD-10-CM diagnosis code for meningococcal 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. Coders also document this condition as arthritis caused by Neisseria meningitidis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Infective arthritis.

Code Identity

ICD-10-CM Code
A39.83
Billable Status
Yes — Valid for Submission
Code Describes
Meningococcal arthritis
Short Description
Meningococcal arthritis
Same as the full description in the CMS dataset.
Parent Code
A39.8
Other meningococcal infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA39Meningococcal infection
This CodeA39.83Meningococcal arthritis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Arthritis caused by Neisseria meningitidis

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)
        • Meningococcus
    • Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)
      • meningococcal
    • Infection, infected, infective(opportunistic)
      • meningococcal
        • joint

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

Clinical InformationClinical

  • Meningococcal Infections

    infections with bacteria of the species neisseria meningitidis.

  • Neisseria meningitidis

    a species of gram-negative, aerobic bacteria. it is a commensal and pathogen only of humans, and can be carried asymptomatically in the nasopharynx. when found in cerebrospinal fluid it is the causative agent of cerebrospinal meningitis (meningitis, meningococcal). it is also found in venereal discharges and blood. there are at least 13 serogroups based on antigenic differences in the capsular polysaccharides; the ones causing most meningitis infections being a, b, c, y, and w-135. each serogroup can be further classified by serotype, serosubtype, and immunotype.

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 A39.83 to ICD-9-CMHistory

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

ICD-9-CM
036.82 Meningococc arthropathy
Approximate The match is approximate rather than exact.

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 A39.83Overview

Is A39.83 (Other meningococcal infections) a billable code?

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

What MS-DRG does A39.83 group to?

When meningococcal arthritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 548, 549, 550, with relative weights from 0.8741 to 1.9309 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A39.83?

Under the General Equivalence Mappings, meningococcal arthritis converts to ICD-9-CM 036.82 (meningococc arthropathy). The mapping is approximate, so confirm the match fits the documentation.

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.