A86

✓ Billable

Unspecified viral encephalitis

Certain infectious and parasitic diseases (A00-B99)

Also Known As

Viral encephalomyelitis NOSViral meningoencephalitis NOS

✓ No additional coding notes for A86

Clinical Description

ICD-10-CM code A86 represents unspecified viral encephalitis. This code falls under the Certain infectious and parasitic diseases (A00-B99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

Frequently Asked Questions

What is ICD-10 code A86?

ICD-10-CM code A86 is "Unspecified viral encephalitis". It belongs to the category: Certain infectious and parasitic diseases (A00-B99).

Is A86 a billable ICD-10 code?

Yes, A86 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

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Code Information

CodeA86

BillableYes

CategoryCertain infectious and parasitic diseases (A00-B99)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)