J45.9 is the ICD-10 code for Asthma, unspecified. It is a four-character subcategory of J45 (Asthma), the most specific level in the WHO edition. It belongs to the block J40–J47 (Chronic lower respiratory diseases) in Chapter X, Diseases of the respiratory system.
- Code type
- Subcategory (4 characters)
- Chapter
- X · J00–J99
- Classification
- WHO ICD-10, 2019 version
What J45.9 includes
Conditions and terms that are coded here.
- Asthmatic bronchitis NOS
- Late-onset asthma
J45.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
J45.9Astma, ospecificerad
J45.9Uspesifisert astma
DJ459Astma UNS
- DJ459BAstma med akut eksacerbation
J45.9Määrittämätön astma
J45.9Asthma bronchiale, nicht näher bezeichnet
J45.9Asthme, sans précision
J45.9astma, niet-gespecificeerd
Listed through more specific codes:
- J45.901Unspecified asthma with (acute) exacerbation
- J45.902Unspecified asthma with status asthmaticus
- J45.909Unspecified asthma, uncomplicated
- J45.990Exercise induced bronchospasm
- J45.991Cough variant asthma
- J45.998Other asthma
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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