2026 ICD-10-CM Diagnosis Code G03Meningitis due to other and unspecified causes

ICD-10-CM Codes›G00–G99›G00-G09›G03

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

G03 is a non-billable ICD-10-CM category code for meningitis due to other and unspecified causes, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G03.0, G03.1, G03.2, and G03.8.

Code Identity

ICD-10-CM Code
G03
Billable Status
No — Non-Billable Category
Code Describes
Meningitis due to other and unspecified causes
Chapter
G00-G09
Inflammatory diseases of the central nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG00-G09Inflammatory diseases of the central nervous system
CategoryG03Meningitis due to other and unspecified causes
This CodeG03Meningitis due to other and unspecified causes

Specific Coding for Meningitis due to other and unspecified causesOverview

Non-specific codes like G03 require more characters. Use one of these billable codes instead:

  • Use G03.0 for Nonpyogenic meningitis

  • Use G03.1 for Chronic meningitis

  • Use G03.2 for Benign recurrent meningitis [Mollaret]

  • Use G03.8 for Meningitis due to other specified causes

  • Use G03.9 for Meningitis, unspecified

Tabular List NotesGuidance

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

Includes

  • arachnoiditis NOS
  • leptomeningitis NOS
  • meningitis NOS
  • pachymeningitis NOS

Type 1 Excludes

  • meningoencephalitis G04
  • meningomyelitis G04

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.

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 G03Overview

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

No. This is a category header that groups the codes for meningitis due to other and unspecified causes, and headers cannot be submitted on claims. Claims for meningitis due to other and unspecified causes need a more specific code from this category, such as G03.0, G03.1, and G03.2.