ICD-10 diagnosis code

J21 Acute bronchiolitis

J21 is the ICD-10 code for Acute bronchiolitis. 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 J20–J22 (Other acute lower respiratory infections) in Chapter X, Diseases of the respiratory system.

Code type: Category (3 characters)
Chapter: X · J00–J99
Classification: WHO ICD-10, 2019 version

What J21 includes

Conditions and terms that are coded here.

with bronchospasm

Subcodes of J21

J21 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

J21Akut bronkiolit (katarr i de små luftvägarna)

DenmarkICD-10-DK

DJ21Akut bronkiolitis

FinlandICD-10-FI

J21Akuutti ilmatiehyttulehdus (bronkioliitti)

GermanyICD-10-GM

J21Akute Bronchiolitis

FranceICD-10-FR

J21Bronchiolite aiguë

NetherlandsICD-10-NL

J21acute bronchiolitis

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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