ICD-11 classes
12 Diseases of the respiratory system
Certain lower respiratory tract diseases

ICD-11 Certain lower respiratory tract diseases

This group refers to diseases of airways that forms the connection between the outside world and the terminal respiratory unit. Intrapulmonary airways are divided into three major groups; bronchi, membranous bronchiole, and respiratory bronchiole/gas exchange ducts.

The diagnosis includes nothing.

The diagnosis excludes nothing.

Diagnosis contains 13 clarifying diagnoses:

1. CA20 — Bronchitis
   It contains 5 clarifying diagnoses.
2. CA21 — Emphysema
   It contains 5 clarifying diagnoses.
3. CA22 — Chronic obstructive pulmonary disease
   It contains 3 clarifying diagnoses.
4. CA23 — Asthma
   It contains 4 clarifying diagnoses.
5. CA24 — Bronchiectasis
6. CA25 — Cystic fibrosis
   It contains 4 clarifying diagnoses.
7. CA26 — Chronic bronchiolitis
   It contains 4 clarifying diagnoses.
8. CA27 — Tracheobronchitis
   It contains 5 clarifying diagnoses.
9. CA05.1 — Acute tracheitis
   It contains 1 clarifying diagnosis.
10. 1C12 — Whooping cough
    It contains 4 clarifying diagnoses.
11. KB29 — Chronic respiratory disease originating in the perinatal period
    It contains 3 clarifying diagnoses.
12. CA2Y — Other specified lower respiratory tract disease
13. CA2Z — Lower respiratory tract disease, unspecified