Suberosis

This code represents a hypersensitivity pneumonitis, specifically farmer's lung, caused by exposure to moldy hay or other agricultural products. It is an extrinsic allergic alveolitis resulting from repeated inhalation of organic dusts containing thermophilic actinomycetes. The condition can manifest as acute, subacute, or chronic inflammation of the lung parenchyma.

Use this code when documentation clearly indicates a diagnosis of farmer's lung due to exposure to moldy hay or similar agricultural dusts. This diagnosis is typically supported by a history of exposure, characteristic respiratory symptoms (e.g., cough, dyspnea, fever), and findings from imaging (e.g., ground-glass opacities, centrilobular nodules) and pulmonary function tests.

• Ensure documentation specifies the causative agent as moldy hay or other agricultural dusts to differentiate from other hypersensitivity pneumonitis types.
• Consider sequencing this code after codes for acute or chronic respiratory failure if present and treated.
• Do not confuse with other forms of hypersensitivity pneumonitis (J67.0-J67.9) unless the specific causative agent for suberosis is documented.