Maple-bark-stripper's lung

Maple-bark-stripper's lung is a hypersensitivity pneumonitis, an inflammatory lung disease caused by an allergic reaction to fungal spores (specifically Cryptostroma corticale) found in moldy maple bark. This condition primarily affects individuals involved in stripping maple bark, leading to symptoms like dyspnea, cough, fever, and chills. Chronic exposure can result in irreversible pulmonary fibrosis.

This code is appropriate for diagnosing a patient presenting with respiratory symptoms and a history of exposure to moldy maple bark, consistent with hypersensitivity pneumonitis. Documentation should clearly link the patient's pulmonary symptoms to occupational or environmental exposure to maple bark, often supported by lung function tests, imaging (e.g., chest X-ray, HRCT), and sometimes serological tests for specific antibodies.

• Ensure documentation explicitly states "maple-bark-stripper's lung" or clearly indicates hypersensitivity pneumonitis due to exposure to maple bark.
• Differentiate from other forms of hypersensitivity pneumonitis (e.g., farmer's lung, bird fancier's lung) which have distinct ICD-10-CM codes.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter, and code any associated symptoms or complications (e.g., pulmonary fibrosis) as secondary diagnoses.