Bronchitis and pneumonitis due to fumes and vapors

This code signifies inflammation of the bronchi and/or lung tissue resulting from the inhalation of noxious fumes or vapors. It represents an acute or chronic respiratory reaction to chemical irritants in the air.

Apply this code when documentation clearly indicates a patient's bronchitis or pneumonitis is directly attributed to exposure to fumes or vapors. This is common in occupational settings, accidental exposures, or chemical spills.

• Ensure the documentation explicitly links the respiratory condition to fume/vapor exposure, not other irritants like dust or smoke.
• Consider an external cause code (E-code) to specify the source and circumstances of the exposure.
• Differentiate from bronchitis due to other causes (e.g., viral, bacterial) which would use different ICD-9 codes.