G00.9 – Bacterial meningitis, unspecified

ICD-10-CM 2027 diagnosis code · Inflammatory diseases of the central nervous system

Billable code

ICD-10-CM code G00.9

Code: G00.9 (claims format: G009)
Description: Bacterial meningitis, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 6. Diseases of the nervous system (G00-G99)
Block: G00-G09 Inflammatory diseases of the central nervous system
Parent codes: G00

Notes for G00.9

Applicable to:

Meningitis due to gram-negative bacteria, unspecified
Purulent meningitis NOS
Pyogenic meningitis NOS
Suppurative meningitis NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

G00 – Bacterial meningitis, not elsewhere classified

Includes:

bacterial arachnoiditis
bacterial leptomeningitis
bacterial meningitis
bacterial pachymeningitis

Excludes1 (not coded here):

bacterial meningoencephalitis (G04.2)
bacterial meningomyelitis (G04.2)

Index terms for G00.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in G00

G00.0 – Hemophilus meningitisBillable
G00.1 – Pneumococcal meningitisBillable
G00.2 – Streptococcal meningitisBillable
G00.3 – Staphylococcal meningitisBillable
G00.8 – Other bacterial meningitisBillable

Frequently asked questions

What is ICD-10 code G00.9?

G00.9 is the ICD-10-CM code for bacterial meningitis, unspecified, in the block G00-G09 (Inflammatory diseases of the central nervous system).

Is G00.9 a billable code?

Yes. G00.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does G00.9 belong to?

It belongs to category G00 – Bacterial meningitis, not elsewhere classified.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.