Chapter X of ICD-10 is titled “Diseases of the respiratory system”. It spans codes J00–J99, in 10 blocks.
What Chapter X excludes
Conditions that look similar but belong under another code.
- certain conditions originating in the perinatal period P00-P96
- certain infectious and parasitic diseases A00-B99
- complications of pregnancy, childbirth and the puerperium O00-O99
- congenital malformations, deformations and chromosomal abnormalities Q00-Q99
- endocrine, nutritional and metabolic diseases E00-E90
- injury, poisoning and certain other consequences of external causes S00-T98
- neoplasms C00-D48
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified R00-R99
Coding notes
- When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g., tracheobronchitis to bronchitis in J40).
Blocks in Chapter X
- J00–J06Acute upper respiratory infections7 categories
- J09–J18Influenza and pneumonia10 categories
- J20–J22Other acute lower respiratory infections3 categories
- J30–J39Other diseases of upper respiratory tract10 categories
- J40–J47Chronic lower respiratory diseases8 categories
- J60–J70Lung diseases due to external agents11 categories
- J80–J84Other respiratory diseases principally affecting the interstitium4 categories
- J85–J86Suppurative and necrotic conditions of lower respiratory tract2 categories
- J90–J94Other diseases of pleura5 categories
- J95–J99Other diseases of the respiratory system4 categories
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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