Is A81 a billable code?
No. A81 is a header code that groups 10 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
A81: Atypical virus infections of central nervous system
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
A81 groups related diagnoses under atypical virus infections of central nervous system. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under A81
- A81.00Creutzfeldt-Jakob disease, unspecified
- A81.01Variant Creutzfeldt-Jakob disease
- A81.09Other Creutzfeldt-Jakob disease
- A81.1Subacute sclerosing panencephalitis
- A81.2Progressive multifocal leukoencephalopathy
- A81.81Kuru
- A81.82Gerstmann-Straussler-Scheinker syndrome
- A81.83Fatal familial insomnia
- A81.89Other atypical virus infections of central nervous system
- A81.9Atypical virus infection of central nervous system, unspecified
A81 questions
What does A81 mean?
A81 is the ICD-10-CM code for Atypical virus infections of central nervous system. It is in chapter 1, Certain infectious and parasitic diseases (A00-B99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.