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In observance of the holidays, all offices will be closed from December 24th through December 26th. We'll resume regular operations on December 27th, and close again for New Year's Eve and New Year's Day.  Wishing you a happy and healthy holiday season! 

Oak Brook Allergists
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    • Downers Grove: (630) 789-0575
    • Elmhurst: (630) 574-0460
    • Naperville: (630) 961-2960
    • Plainfield: (815) 609-8286
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  • Our Team
    • David J. Knysak, MD
    • Raymond M. Pongonis Jr., MD
    • Zachary E. Rubin, MD
    • Jennifer Catalfio, PA-C
    • Tammy Laas, APRN-CNP
  • Conditions & Treatments
    • Allergic Rhinitis (Hay Fever)
    • Asthma
    • Chronic Sinusitis
    • Eczema & Hives
    • Food Allergies
    • Oral Immunotherapy
    • Pet Allergies
    • Stinging Insect Allergies
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Request an Appointment

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Please do not use this form if you have an urgent medical problem or you need to reschedule an existing appointment. Instead, contact Oak Brook Allergists at (630) 574-0460. After you submit your request, our appointment scheduler will respond within 48 hours. You can also download new patient forms to save time in the office.

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Oak Brook Allergists Blog

Learn about the latest advances in allergy and asthma treatments, plus news about our practice.

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Patient Education

Explore allergy and asthma conditions and treatments in our patient education center.

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At Oak Brook Allergists, our asthma and allergy specialists offer comprehensive care for Allergic Rhinitis (Hay Fever), Asthma, Chronic Sinusitis, Eczema & Hives, Food Allergies, Pet Allergies, and Stinging Insect Allergies.