ICD-10 Code J67.4 – Maltworker’s lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J67.4 – Maltworker’s lung
What it is
J67.4 identifies hypersensitivity pneumonitis caused by exposure to moldy or contaminated malt dust. Use it when documentation links respiratory disease to maltworker exposure.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include cough, shortness of breath, and symptoms that worsen after workplace exposure to malt dust.
When to use this code
Use this code when the clinician documents maltworker’s lung, hypersensitivity pneumonitis, or allergic alveolitis due to malt exposure. It is appropriate when the occupational cause is clearly stated in the record. If the exposure source is not specified, check documentation before coding.
Do not use for
Do not use J67.4 for nonspecific cough, asthma, or other lung disease without documented malt exposure. Check documentation if the record does not clearly identify this hypersensitivity pneumonitis.
Coding tip
Confirm the occupational exposure and the provider’s exact diagnosis before assigning J67.4.