2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Meningitis due to other and unspecified causes
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G03: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G03, its category, or a range that includes it.

Notes 1

These notes mention G03.

  • G09 Sequelae of inflammatory diseases of central nervous system
    Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals. names G00-G08, which includes this code

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G03Overview

What is the ICD-10 code for meningitis due to other and unspecified causes?

G03 is the ICD-10-CM category for meningitis due to other and unspecified causes, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can G03 be reported with a code from G04?

Not as a rule. The Excludes1 note on G03 lists "meningoencephalitis (G04.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).