CA70.0ICD-11 MMS 2026-01
Farmer lung
Description
Farmer's lung disease is a hypersensitivity pneumonitis, caused by inhalation of organic dust containing spores of microorganisms, often thermophilic actinomycetes and less commonly Saccharopolyspora rectivirgula, living in mouldy hay, straw, or grain. Typical symptoms include dyspnoea, cough, tiredness, headaches and occasional fever/night sweats, with acute, sub-acute or chronic clinical course and can result in chronic disability with granulomatous disease.
Coding note from above levels
Includes: allergic alveolitis and pneumonitis due to inhaled organic dust and particles of fungal, actinomycetic or other origin
Index terms
- Farmer lung
- farmers' lung
- farmers' lung disease
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- fibrosis of lung with farmers' lung
- harvester lung
- harvesters' hypersensitivity pneumonitis
- haymaker lung
- haymakers' hypersensitivity pneumonitis
- moldy hay disorder
- moldy hay pneumoconiosis
- mouldy hay disease
- threshers' lung
Exclusions from above levels
CA80– Airway disease due to specific organic dustCA81.0– pneumonitis due to inhalation of chemicals, gases, fumes or vapoursCA40– Pneumonia
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CA23– Asthma01– Certain infectious or parasitic diseases05– Endocrine, nutritional or metabolic diseases18– Complications of pregnancy, childbirth and the puerperium19– Certain conditions originating in the perinatal period20– Congenital malformations, deformations and chromosomal abnormalities22– Injury, poisoning or certain other consequences of external causes
Sibling codes
CA70.1– BagassosisCA70.2– Bird fancier lungCA70.3– SuberosisCA70.4– Malt worker lungCA70.5– Mushroom worker lungCA70.6– Maple bark stripper lungCA70.7– Air conditioner or humidifier lungCA70.Y– Other specified hypersensitivity pneumonitis due to organic dustCA70.Z– Hypersensitivity pneumonitis due to organic dust, unspecified
Foundation entity
Allowed postcoordination axes
Part of: CA70: Hypersensitivity pneumonitis due to organic dust › 12: Diseases of the respiratory system