ICD-10 diagnosis code

B34 Viral infection of unspecified site

B34 is the ICD-10 code for Viral infection of unspecified site. It is a three-character category divided into 7 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block B25–B34 (Other viral diseases) in Chapter I, Certain infectious and parasitic diseases.

Code type: Category (3 characters)
Chapter: I · A00–B99
Classification: WHO ICD-10, 2019 version

What B34 excludes

Conditions that look similar but belong under another code.

cytomegaloviral disease NOS B25.9
herpesvirus [herpes simplex] infection NOS B00.9
retrovirus infection NOS B33.3
viral agents as the cause of diseases classified to other chapters B97.-

Subcodes of B34

B34 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

B34Virussjukdom med ospecificerad lokalisation

DenmarkICD-10-DK

DB34Virussygdom uden angivelse af lokalisation

FinlandICD-10-FI

B34Sijainniltaan määrittämätön virussairaus

GermanyICD-10-GM

B34Viruskrankheit nicht näher bezeichneter Lokalisation

FranceICD-10-FR

B34Infection virale, siège non précisé

NetherlandsICD-10-NL

B34virusinfectie van niet gespecificeerde lokalisatie

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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