Allergic rhinitis due to other allergen

This code signifies inflammation of the nasal passages caused by an allergic reaction to a substance other than pollen, animal dander, or dust mites. Symptoms typically include sneezing, rhinorrhea, nasal congestion, and itching of the nose, eyes, or throat. It represents a hypersensitivity response to an identified, non-seasonal allergen.

Use this code when documentation specifies allergic rhinitis and the causative allergen is identified but falls outside the categories of pollen, animal dander, or dust mites. Examples include allergies to molds, cockroaches, or specific chemicals. Physician documentation must clearly state "allergic rhinitis due to [specific other allergen]."

• Ensure the allergen is clearly identified and is not one covered by more specific allergic rhinitis codes (e.g., 477.0, 477.1, 477.2).
• Do not use for vasomotor rhinitis (478.0) or unspecified allergic rhinitis (477.9).
• Consider an additional code for exposure to the specific allergen if documented and relevant.