2026 ICD-10-CM Diagnosis Code G00.0Hemophilus meningitis

ICD-10-CM Codes›G00–G99›G00-G09›G00

ICD-10-CM G00.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G00.0 is a billable ICD-10-CM diagnosis code for hemophilus meningitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as haemophilus infection of the central nervous system. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Meningitis.

Code Identity

ICD-10-CM Code
G00.0
Billable Status
Yes — Valid for Submission
Code Describes
Hemophilus meningitis
Short Description
Hemophilus meningitis
Same as the full description in the CMS dataset.
Parent Code
G00
Bacterial meningitis, not elsewhere classified

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG00-G09Inflammatory diseases of the central nervous system
CategoryG00Bacterial meningitis, not elsewhere classified
This CodeG00.0Hemophilus meningitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Haemophilus infection of the central nervous system
  • Haemophilus influenzae meningitis
  • Haemophilus influenzae type b infection
  • Haemophilus meningitis
  • Meningitis caused by Haemophilus influenzae type b

Tabular List NotesGuidance

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

Inclusion Terms

  • Meningitis due to Hemophilus influenzae

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)
      • bacterial
        • H. influenzae
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • Haemophilus (influenzae)
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • H. influenzae
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • influenzal (H. influenzae)
    • Meningoencephalitis
      • in (due to)
        • Hemophilus influenzae (H. influenzae)
    • Meningoencephalitis
      • in (due to)
        • H. influenzae
    • Meningoencephalitis
      • influenzal (H. influenzae)

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR NVS001
Meningitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Haemophilus Infections

Haemophilus is the name of a group of bacteria. There are several types of Haemophilus. They can cause different types of illnesses involving breathing, bones and joints, and the nervous system.

Read the full article at MedlinePlus

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

Convert G00.0 to ICD-9-CMHistory

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

ICD-9-CM
320.0 Hemophilus 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 G00.0Overview

Is G00.0 (Bacterial meningitis, not elsewhere classified) a billable code?

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

What is the ICD-9 equivalent of G00.0?

Under the General Equivalence Mappings, hemophilus meningitis converts to ICD-9-CM 320.0 (hemophilus 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.