Lab test

IgE Test - Immunoglobulin E Level Testing

The Immunoglobulin E (IgE) Test measures the total amount of IgE antibodies in the blood.

Typical price

From $49

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

The Immunoglobulin E (IgE) Test measures the total amount of IgE antibodies in the blood. IgE is the antibody class involved in allergic responses, and a total IgE measurement can help screen for or support the evaluation of allergic disease. It is often used alongside allergen-specific tests, since a total level does not identify which substances you react to. Elevated total IgE can occur with allergies, but it can also be affected by other conditions. Results are interpreted with your symptoms and medical history.

• Total Immunoglobulin E (IgE) Measures the overall concentration of IgE antibodies in the blood.

• People with ongoing or unexplained allergy-like symptoms.
• Individuals whose provider wants an initial screen for allergic disease.
• People who need a baseline before or during allergy evaluation.
• Anyone with a history of allergic conditions who is being monitored.
• People whose provider suspects an immune or allergic component to their symptoms.

• No fasting is required.
• Continue your usual medications unless a healthcare provider advises otherwise.
• Pause antihistamines before testing only if your provider instructs you to, as they may affect some allergy results.
• Tell your provider about any known allergies, medications, or immune conditions.

The report shows your total IgE level compared with the reference range. A higher level may be seen in allergic conditions, while a normal level does not rule out allergy because total IgE can be normal even when specific allergies are present. A total IgE result does not identify which allergens are involved, so it is usually combined with specific allergen tests. Discuss any abnormal or unexpected result with a healthcare provider, who can interpret it with your history and decide on further testing.

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