Bacterial Meningitis ICD-10-CM G00 Coding Guide

ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G00 includes acute bacterial infections of the meninges not classified elsewhere, covering bacterial meningitis presentations when a more specific organism code is not assigned. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving meningitis with bacterial etiology, capturing disease severity, central nervous system involvement, and associated complications. Accurate coding within the ICD-10-CM G00 group supports proper claim adjudication and complete clinical documentation.

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ICD-10-CM G00: Bacterial Meningitis, Not Elsewhere Classified Overview

The ICD-10-CM G00 group represents acute bacterial infections of the meninges not classified elsewhere, affecting the central nervous system. These diagnoses target inflammation of the meninges and may include various bacterial etiologies when a more specific code is not appropriate. Accurate coding matters for appropriate claim adjudication and to reflect clinical complexity that can affect reimbursement.

When to Use

Use a code from this group when the clinical record documents bacterial meningitis but does not specify an organism or when the presentation does not fit more specific bacterial meningitis codes. Codes in this group are appropriate for acute bacterial meningeal infections affecting the central nervous system where specificity is limited.

ICD-10-CM Code	Description
G00.0	Hemophilus meningitis
G00.1	Pneumococcal meningitis
G00.2	Streptococcal meningitis
G00.3	Staphylococcal meningitis
G00.8	Other bacterial meningitis
G00.9	Bacterial meningitis, unspecified

ICD-10-CM Code

Description

G00.0

Hemophilus meningitis

G00.1

Pneumococcal meningitis

G00.2

Streptococcal meningitis

G00.3

Staphylococcal meningitis

G00.8

Other bacterial meningitis

G00.9

Bacterial meningitis, unspecified

DRG Codes

7 rows

DRG Code	Description
023	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
024	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
094	Bacterial and Tuberculous Infections of Nervous System with MCC
095	Bacterial and Tuberculous Infections of Nervous System with CC
096	Bacterial and Tuberculous Infections of Nervous System without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

An adult presents to the emergency department with sudden onset high fever, severe headache, neck stiffness, photophobia, and altered mental status after a brief prodrome; lumbar puncture shows neutrophilic pleocytosis and Gram-positive cocci on Gram stain consistent with pneumococcal infection, prompting immediate empiric therapy and assignment of a bacterial meningitis code. Typical codes: G00.1, G00.9.
An elderly nursing home resident develops fever and progressive confusion over 48 hours following a recent sinus infection; CSF culture grows Haemophilus species and the clinical team documents bacterial meningitis as a complication of the contiguous ENT infection, leading to use of a specific bacterial meningitis code. Typical codes: G00.2, G00.9.
A newborn in the neonatal intensive care unit is febrile and irritable with poor feeding; blood and CSF cultures isolate Group B Streptococcus, and the chart lists bacterial meningitis as the primary infectious diagnosis requiring targeted antimicrobial therapy and close neurologic monitoring. Typical codes: G00.0, G00.9.

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

ICD-10-CM Code	Description
G00.0	Hemophilus meningitis
G00.1	Pneumococcal meningitis
G00.2	Streptococcal meningitis
G00.3	Staphylococcal meningitis
G00.8	Other bacterial meningitis
G00.9	Bacterial meningitis, unspecified

An adult presents to the emergency department with sudden onset high fever, severe headache, neck stiffness, photophobia, and altered mental status after a brief prodrome; lumbar puncture shows neutrophilic pleocytosis and Gram-positive cocci on Gram stain consistent with pneumococcal infection, prompting immediate empiric therapy and assignment of a bacterial meningitis code. Typical codes: G00.1, G00.9.
An elderly nursing home resident develops fever and progressive confusion over 48 hours following a recent sinus infection; CSF culture grows Haemophilus species and the clinical team documents bacterial meningitis as a complication of the contiguous ENT infection, leading to use of a specific bacterial meningitis code. Typical codes: G00.2, G00.9.
A newborn in the neonatal intensive care unit is febrile and irritable with poor feeding; blood and CSF cultures isolate Group B Streptococcus, and the chart lists bacterial meningitis as the primary infectious diagnosis requiring targeted antimicrobial therapy and close neurologic monitoring. Typical codes: G00.0, G00.9.

ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview

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ICD-10-CM G00: Bacterial Meningitis, Not Elsewhere Classified Overview

ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview

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ICD-10-CM G00: Bacterial Meningitis, Not Elsewhere Classified Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview

Sign up for ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview policy alerts

ICD-10-CM G00: Bacterial Meningitis, Not Elsewhere Classified Overview

ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview

Sign up for ICD-10-CM Code For Bacterial Meningitis Not Elsewhere Classified: Group Overview policy alerts

ICD-10-CM G00: Bacterial Meningitis, Not Elsewhere Classified Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

When should the `ICD-10-CM G00` group be used for diagnosis coding?

Which individual codes are included in the `G00` group and what do they represent?

How does accurate coding within `ICD-10-CM G00` affect reimbursement and claims?

Are there related DRGs that coders should be aware of when assigning `G00` codes?

Can `G00` codes capture disease severity and complications of bacterial meningitis?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

When should the `ICD-10-CM G00` group be used for diagnosis coding?

Which individual codes are included in the `G00` group and what do they represent?

How does accurate coding within `ICD-10-CM G00` affect reimbursement and claims?

Are there related DRGs that coders should be aware of when assigning `G00` codes?

Can `G00` codes capture disease severity and complications of bacterial meningitis?

References