2026 ICD-10-CM Diagnosis Code G03.0Nonpyogenic meningitis

ICD-10-CM Codes›G00–G99›G00-G09›G03

ICD-10-CM G03.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G03.0 is a billable ICD-10-CM diagnosis code for nonpyogenic meningitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as aseptic meningitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Meningitis.

Code Identity

ICD-10-CM Code
G03.0
Billable Status
Yes — Valid for Submission
Code Describes
Nonpyogenic meningitis
Short Description
Nonpyogenic meningitis
Same as the full description in the CMS dataset.
Parent Code
G03
Meningitis due to other and unspecified causes

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG00-G09Inflammatory diseases of the central nervous system
CategoryG03Meningitis due to other and unspecified causes
This CodeG03.0Nonpyogenic meningitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Aseptic meningitis
  • Aseptic meningitis caused by drug
  • Aseptic meningitis due to human immunodeficiency virus infection
  • Meningitis caused by Coxiella burnetii
  • Meningitis following procedure
  • Non-infective meningitis due to inflammatory disorder
  • Non-pyogenic meningitis
  • Postoperative aseptic meningitis
  • Postoperative meningitis

Tabular List NotesGuidance

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

Inclusion Terms

  • Aseptic meningitis
  • Nonbacterial meningitis

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.

    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • abacterial
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • aseptic (acute)
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • clear cerebrospinal fluid NEC
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • nonbacterial
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • nonpyogenic NEC
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • serosa circumscripta NEC
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • sterile

Clinical ClassificationClinical

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

CCSR NVS001
Meningitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Aseptic Meningitis

    inflammation of the membranes surrounding the brain and spinal cord without a bacterial pathogen.

  • Aseptic Meningitis, CTCAE

    a disorder characterized by an inflammatory process of the meninges of the brain and/or spinal cord.

  • Grade 3 Aseptic Meningitis, CTCAE

    steroid therapy indicated; severe changes in mental status; self-limited seizure activity; neurologic abnormalities

  • Grade 4 Aseptic Meningitis, CTCAE

    life-threatening consequences; urgent intervention indicated

  • Grade 5 Aseptic Meningitis, CTCAE

    death

Patient EducationClinical

Meningitis

Meningitis is inflammation of the thin tissue that surrounds the brain and spinal cord, called the meninges. There are several types of meningitis. The most common is viral meningitis. You get it when a virus enters the body through the nose or mouth and travels to the brain. Bacterial meningitis is rare but can be deadly.

Read the full article at MedlinePlus

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

Convert G03.0 to ICD-9-CMHistory

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

ICD-9-CM
322.0 Nonpyogenic meningitis
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 G03.0Overview

Is G03.0 (Meningitis due to other and unspecified causes) a billable code?

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

What is the ICD-9 equivalent of G03.0?

Under the General Equivalence Mappings, nonpyogenic meningitis converts to ICD-9-CM 322.0 (nonpyogenic meningitis). 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.