A87.9 – Viral meningitis, unspecified

ICD-10-CM 2027 diagnosis code · Viral and prion infections of the central nervous system

Billable code

ICD-10-CM code A87.9

Code: A87.9 (claims format: A879)
Description: Viral meningitis, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: A80-A89 Viral and prion infections of the central nervous system
Parent codes: A87

Notes inherited from parent codes

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

A87 – Viral meningitis

Excludes1 (not coded here):

meningitis due to herpesvirus [herpes simplex] (B00.3)
meningitis due to herpesvirus [herpes simplex] (B00.3)
meningitis due to measles virus (B05.1)
meningitis due to mumps virus (B26.1)
meningitis due to poliomyelitis virus (A80.-)
meningitis due to zoster (B02.1)

Block A80-A89

Excludes1 (not coded here):

postpolio syndrome (G14)
sequelae of poliomyelitis (B91)
sequelae of viral encephalitis (B94.1)

Index terms for A87.9

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

Meningitis, viral NEC

Related codes in A87

A87.0 – Enteroviral meningitisBillable
A87.1 – Adenoviral meningitisBillable
A87.2 – Lymphocytic choriomeningitisBillable
A87.8 – Other viral meningitisBillable

Frequently asked questions

What is ICD-10 code A87.9?

A87.9 is the ICD-10-CM code for viral meningitis, unspecified, in the block A80-A89 (Viral and prion infections of the central nervous system).

Is A87.9 a billable code?

Yes. A87.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does A87.9 belong to?

It belongs to category A87 – Viral meningitis.

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.