477.0
ICD-9-CMThis diagnosis code signifies inflammation of the nasal passages caused by an allergic reaction specifically to pollen. Patients typically present with symptoms such as sneezing, rhinorrhea, nasal congestion, and itchy eyes, nose, or throat, occurring seasonally in response to airborne pollen.
Apply this code for patients experiencing allergic rhinitis symptoms clearly linked to pollen exposure, as documented by patient history, seasonal symptom patterns, or positive allergy testing to pollens. This code is appropriate when the allergen is identified as pollen, distinguishing it from other environmental or perennial allergens.
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