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We will be closed Friday, July 4th and Saturday, July 5th in observance of the holiday. Thank you!

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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    • David J. Knysak, MD
    • Raymond M. Pongonis Jr., MD
    • Zachary E. Rubin, MD
    • Jennifer Catalfio, PA-C
    • Tammy Laas, APRN-CNP
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    • Allergic Rhinitis (Hay Fever)
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Allergy and Asthma Care Locations

Allergists Plainfield, IL - Oak Brook Allergists - allergies - allergy treatment near me - Allergists Downers Grove, IL - Allergists Naperville, IL - Allergists Elmhurst, IL

Get ready to breathe easier.

The friendly staff at Oak Brook Allergists welcomes your call and looks forward to serving you. We offer extended evening and Saturday hours for injections and doctor visits at all four of our convenient locations throughout northeastern Illinois. It’s all part of our effort to make it easy to receive the allergy or asthma care you need. If you have any questions or wish to schedule a visit, please call us at (630) 574-0460 or use our secure appointment request form.

Locations & Phone

Our hours vary by location. Visit the appropriate location page below for more information. All of our allergy and asthma services and providers are available at each Oak Brook Allergists location.

Downers Grove

6800 S. Main Street, Suite 110
Downers Grove, IL 60516
Phone: (630) 789-0575
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Elmhurst

360 W. Butterfield Road, Suite 140
Elmhurst, IL 60126
Phone: (630) 574-0460
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Naperville

1220 Hobson Road, Suite 114
Naperville, IL 60540
Phone: (630) 961-2960
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Plainfield

24600 W. 127th Street, Building B, Suite 110
Plainfield, IL 60585
Phone: (815) 609-8286
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What to Expect

We are unable to treat patients (or prescribe medications) over the phone for a problem that has not been evaluated in person at our office. Many allergy problems have similar symptoms and require an examination for the most accurate and effective treatment.

When contacting or visiting our offices, please follow these suggestions:

  • For routine calls, please call during office hours. Our receptionist will take your name, telephone number, and reason for calling. Your call will be returned by a nurse or physician as soon as possible.
  • If you are sick, please call as early in the day as possible so that we may be able to squeeze you in to be seen that day.
  • When you arrive at our office – whether it’s for an allergy shot or a doctor’s appointment – please remember to always print your name on the sign-in list at the front desk.
Office Hours

Our regular office hours vary by location. Please visit the appropriate location page for more information: Downers Grove, Elmhurst, Naperville, or Plainfield, Illinois.

Medical Emergencies

In the event of a life-threatening medical emergency, call emergency medical services at 911 immediately. DO NOT WAIT! Inform the emergency room staff that you are a patient of Oak Brook Allergists, and they will contact us.

After Hours Urgent Medical Needs

If you have an urgent medical need and need to talk to our doctors after our regular hours, please call your primary care physician. If you cannot reach your PCP, you may call our office at (630) 574-0460. A doctor is on-call 24 hours a day. Your call will be returned promptly.

Insurance / Payment / Billing

At Oak Brook Allergists, we accept Medicare and most major insurance plans, including Blue Cross Blue Shield, Aetna and Humana.

Please contact your insurance company or you may call our billing department at (630) 574-0463 to find out if we accept your plan.

If your insurance plan requires you to pay a co-payment, co-insurance, and/or a deductible, you will need to pay at the time of your visit. For your convenience we accept cash, checks, Visa, MasterCard, and Discover.

If you have a question related to your bill or insurance, please contact our billing specialists at (630) 574-0463.

Referrals

If your insurance is an HMO/managed care plan and you are required to obtain a referral from your primary care physician, the referral must be obtained before you can be seen for an office visit. Please coordinate this with your primary care physician in advance. Appointments will be rescheduled if required referrals are not received in the office by the time of your visit.

Hospital Affiliations

Doctors at Oak Brook Allergists have hospital affiliations with:

  • Edward Hospital
  • Elmhurst Hospital
Prescription Requests

Prescriptions and refills for established patients of Oak Brook Allergists are routinely issued during our regular office hours. Visit the appropriate location page for its hours: Downers Grove, Elmhurst, Naperville, or Plainfield, Illinois.

You can make your request by calling our office at (630) 574-0460. Please call before you run out of medication. Make sure you have your pharmacist’s phone number when you call.

Refills will not be called in if you have not seen the physician within the preceding three (3) months.

Refills also will not be issued during the evenings, weekends, or holidays, as the doctors may not have access to all your medical records during those times. It is helpful to anticipate your refill needs to avoid an interruption in your medication therapy.

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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.