What does ICD-10 code G03 mean?

ICD-10 code G03 is the standardized code used for meningitis due to other and unspecified causes in medical records and coding systems.

When is ICD-10 code G03 used?

Doctors, hospitals, and insurers may use ICD-10 code G03 when recording meningitis due to other and unspecified causes in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code G03 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code G03: Meningitis due to other and unspecified causes

Name: ICD-10 Code G03: Meningitis due to other and unspecified causes
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:06:44.104Z

G03 is an ICD-10 diagnosis entry used to group records related to Meningitis due to other and unspecified causes. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

May be used when a clinician documents meningitis due to other and unspecified causes in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

6Diseases of the nervous system (G00-G99)

block

G00-G09Inflammatory diseases of the central nervous system

currentG00-G09

Official coding notes

Includes

arachnoiditis NOS
leptomeningitis NOS
meningitis NOS
pachymeningitis NOS

Excludes1 (do not code together)

meningoencephalitis (G04.-)
meningomyelitis (G04.-)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

NeurologistGeneral Physician

Sibling codes

G00Bacterial meningitis, not elsewhere classified G01Meningitis in bacterial diseases classified elsewherebillable G02Meningitis in other infectious and parasitic diseases classified elsewherebillable G04Encephalitis, myelitis and encephalomyelitis G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere G06Intracranial and intraspinal abscess and granuloma G07Intracranial and intraspinal abscess and granuloma in diseases classified elsewherebillable G08Intracranial and intraspinal phlebitis and thrombophlebitisbillable G09Sequelae of inflammatory diseases of central nervous systembillable

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

G03

Replacement codes

G03.0 — Nonpyogenic meningitisG03.1 — Chronic meningitisG03.2 — Benign recurrent meningitis [Mollaret]G03.8 — Meningitis due to other specified causesG03.9 — Meningitis, unspecified

Common synonyms

Meningitis due to other and unspecified causesMeningitis due to other and causes

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.