LabInformationLab tests, explained

IgE Test in Illinois

This page explains the ige test, what it measures, and how to arrange it. An IgE test measures the amount of immunoglobulin E, a type of antibody made by the immune system, in a blood sample. It is usually ordered to help evaluate allergies, asthma, or suspected immune conditions, and sometimes to check for parasitic infections. Across Illinois, part of Midwest, the ige test can be ordered directly and collected at a certified site — no referral required.

Sample type
blood
Category
Protein
Turnaround
1-3 business days
Price
$49
Referral
Not required

An IgE test measures the amount of immunoglobulin E, a type of antibody made by the immune system, in a blood sample. It is usually ordered to help evaluate allergies, asthma, or suspected immune conditions, and sometimes to check for parasitic infections.

What it measures

  • Total IgE — The overall amount of IgE antibody in the blood, not specific to any one substance.
  • Allergen-specific IgE — IgE that reacts to a particular allergen, such as pollen, pet dander, or a food.
  • Food-specific IgE — IgE directed at individual foods, used when a food allergy is suspected.
  • Inhalant-specific IgE — IgE directed at airborne triggers like dust mites, mold, or grass.
  • Parasite-related IgE — IgE levels can rise with some parasitic infections, so it may be checked in that context.

Who it is for

A primary care clinician, allergist, or immunologist typically orders this test when a person has allergy-like symptoms, hard-to-control asthma, or a suspected immune or parasitic problem.

Preparation

No fasting is required for an IgE test. Tell your clinician about any medications you take, because some drugs can affect results, and follow any specific instructions you are given.

Results and what they mean

Results are reported as a number, often in international units per milliliter (IU/mL), for total IgE, and as a level or class for each specific allergen tested. A clinician interprets these numbers alongside your symptoms and history, since a result alone does not confirm or rule out a condition. This is general information, not medical advice; discuss your results with a qualified clinician.

Requesting the IgE Test in Illinois

Order online, choose a certified collection site in Illinois, and review results through a secure portal. No referral is required, and orders are processed confidentially. With a wide spread of cities and towns where trips are often grouped together, it pays to schedule your collection in advance.

Frequently asked questions

Do I need to fast before an IgE test?

No. Fasting is not required, and you can eat and drink normally unless your clinician gives other instructions.

How long does it take to get results?

Results are usually available within 1 to 3 business days, though timing can vary by lab.

Does a high IgE level mean I definitely have an allergy?

Not necessarily. IgE levels can be high for several reasons, and a clinician looks at your symptoms and history to interpret the result.

Can I take my allergy medication before the test?

Ask your clinician first. Some medications may affect results, and they can advise whether to adjust anything before testing.

IgE Test by city in Illinois

All testing in Illinois →   Full IgE Test guide →