Upper respiratory inflammation due to fumes and vapors

This code signifies an inflammatory response in the upper respiratory tract, such as the nose, pharynx, or larynx, directly caused by exposure to noxious fumes or vapors. It describes an acute or subacute irritation or chemical injury to these airways.

Apply this code when documentation clearly links upper respiratory symptoms (e.g., rhinitis, pharyngitis, laryngitis) to inhalation of irritating fumes or vapors. This is often seen in occupational exposures or accidental incidents involving chemical inhalation.

• Ensure the documentation specifies "upper" respiratory involvement; lower respiratory issues due to fumes/vapors would be coded elsewhere.
• Distinguish from allergic reactions or infectious causes of upper respiratory inflammation.
• Consider an external cause code (E-code) to identify the specific fumes or vapors and the circumstances of exposure.