J21.9 is the ICD-10 code for Acute bronchiolitis, unspecified. It is a four-character subcategory of J21 (Acute bronchiolitis), the most specific level in the WHO edition. It belongs to the block J20–J22 (Other acute lower respiratory infections) in Chapter X, Diseases of the respiratory system.
- Code type
- Subcategory (4 characters)
- Chapter
- X · J00–J99
- Classification
- WHO ICD-10, 2019 version
What J21.9 includes
Conditions and terms that are coded here.
- Bronchiolitis (acute)
J21.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
J21.9Uspesifisert akutt bronkiolitt
DJ219Akut bronkiolitis UNS
J21.9Määrittämätön akuutti bronkioliitti
- J21.90Lasten akuutti obstruktiivinen bronkiitti
- J21.99Määrittämätön akuutti bronkioliitti
J21.9Akute Bronchiolitis, nicht näher bezeichnet
J21.9Bronchiolite aigüe, sans précision
J21.9acute bronchiolitis, niet-gespecificeerd
J21.9Acute bronchiolitis, unspecified
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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