The block J40–J47 of ICD-10 is titled “Chronic lower respiratory diseases”. It is part of Chapter X, Diseases of the respiratory system, and holds 8 groups.
What J40–J47 excludes
Conditions that look similar but belong under another code.
Codes in J40–J47
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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