2026 ICD-10-CM Diagnosis Code G03.8Meningitis due to other specified causes

ICD-10-CM Codes›G00–G99›G00-G09›G03

ICD-10-CM G03.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G03.8 is a billable ICD-10-CM diagnosis code for meningitis due to other specified causes. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Meningitis.

Code Identity

ICD-10-CM Code
G03.8
Billable Status
Yes — Valid for Submission
Code Describes
Meningitis due to other specified causes
Short Description
Meningitis due to other specified causes
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 CodeG03.8Meningitis due to other specified causes

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Central nervous system disorder due to Sjögren's syndrome
  • Chemical meningitis
  • Hypertrophic pachymeningitis due to disorder of immune function
  • Leptomeningitis
  • Lymphomatous meningitis
  • Meningeal leukemia
  • Meningitis due to and following intrathecal injection
  • Meningitis due to Behcet disease
  • Meningitis due to granulomatosis with polyangiitis
  • Meningitis due to Sjögren syndrome
  • Meningitis due to systemic lupus erythematosus
  • Meningitis following central neuraxial block
  • Meningitis following procedure
  • Pachymeningitis
  • Pachymeningitis due to inflammatory disorder
  • Pachymeningitis due to secondary malignant neoplastic disease

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.

    • Complication(s) (from) (of)
      • vaccination
        • meningitis
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • in (due to)
        • preventive immunization, inoculation or vaccination
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • in (due to)
        • specified cause NEC

Clinical ClassificationClinical

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

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

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 G03.8 to ICD-9-CMHistory

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

ICD-9-CM
322.1 Eosinophilic meningitis
Approximate The match is approximate rather than exact.
ICD-9-CM
997.09 Surg comp nerv systm NEC
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 G03.8Overview

Is G03.8 (Meningitis due to other and unspecified causes) a billable code?

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

What is the ICD-9 equivalent of G03.8?

Under the General Equivalence Mappings, meningitis due to other specified causes converts to ICD-9-CM 322.1 (eosinophilic meningitis) and 997.09 (surg comp nerv systm NEC). 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.