A81 is the ICD-10 code for Atypical virus infections of central nervous system. It is a three-character category divided into 5 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block A80–A89 (Viral infections of the central nervous system) in Chapter I, Certain infectious and parasitic diseases.
- Code type
- Category (3 characters)
- Chapter
- I · A00–B99
- Classification
- WHO ICD-10, 2019 version
What A81 includes
Conditions and terms that are coded here.
- prion diseases of the central nervous system
Subcodes of A81
A81 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DA81Atypiske virusinfektioner i centralnervesystemet
A81Keskushermoston prionisairaudet ja atyyppiset virusinfektiot
A81Atypische Virusinfektionen des Zentralnervensystems
A81Infections atypiques à virus, du système nerveux central
A81atypische virusinfecties van centraal zenuwstelsel
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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