Maltworker's lung

This code represents a hypersensitivity pneumonitis, specifically an allergic reaction in the lungs caused by exposure to mold spores, particularly Aspergillus clavatus, found in malted barley. It is an inflammatory lung condition resulting from repeated inhalation of these organic dusts, leading to respiratory symptoms and potential long-term lung damage.

Use this code when documentation clearly indicates a diagnosis of maltworker's lung, often presenting with symptoms like cough, dyspnea, fever, and chills following exposure to malting environments. Supporting documentation should include a history of occupational exposure to malted grain, clinical signs consistent with hypersensitivity pneumonitis, and potentially imaging or pulmonary function test results.

• Ensure the documentation explicitly links the lung condition to exposure in a malting environment.
• Differentiate from other forms of hypersensitivity pneumonitis (e.g., farmer's lung, bird fancier's lung) which have distinct codes.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter, and code any associated respiratory symptoms or complications separately.