B27 is the ICD-10 code for Infectious mononucleosis. It is a three-character category divided into 4 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 B27 includes
Conditions and terms that are coded here.
- glandular fever
- monocytic angina
- Pfeiffer disease
Subcodes of B27
B27 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
B27Körtelfeber
DB27Mononukleose
B27Mononukleoosi
B27Infektiöse Mononukleose
B27Mononucléose infectieuse
B27mononucleosis infectiosa
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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