ICD-11 MMS 2026-01
Asthma
Description
Asthma is a chronic inflammatory disorder of the airways in which many cells and cellular elements play a role. It is characterised by an increased responsiveness of the trachea and bronchi to various stimuli and manifested by a widespread narrowing of the airways that change in severity either spontaneously or as a result of therapy. This leads to recurrent episodes of wheezing, breathlessness, chest tightness, and coughing, particularly at night or in the early morning.
Index terms
- Asthma
- Idiosyncratic asthma
Excludes
CA22 – chronic obstructive asthmaCA22.1 – chronic asthmatic (obstructive) bronchitisCA60.1 – miner’s asthmaCA70 – wood asthmaMD11.C – Wheezing
Exclusions from above levels
01 – Certain infectious or parasitic diseases05 – Endocrine, nutritional or metabolic diseases18 – Complications of pregnancy, childbirth and the puerperium
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19 – Certain conditions originating in the perinatal period20 – Congenital malformations, deformations and chromosomal abnormalities22 – Injury, poisoning or certain other consequences of external causes
Child codes
CA23.0 – Allergic asthmaCA23.1 – Non-allergic asthmaCA23.2 – Other specified forms of asthma or bronchospasmCA23.3 – Unspecified asthma
Sibling codes
CA20 – BronchitisCA21 – EmphysemaCA22 – Chronic obstructive pulmonary diseaseCA24 – BronchiectasisCA25 – Cystic fibrosisCA26 – Chronic bronchiolitisCA27 – TracheobronchitisCA2Y – Other specified lower respiratory tract diseaseCA2Z – Lower respiratory tract disease, unspecified
Allowed postcoordination axes
Part of: 12: Diseases of the respiratory system
