How accurate is environmental allergy testing compared to skin testing?

Blood-based IgE testing typically has sensitivity ranging from 60% to 95% and specificity from 30% to 95%, depending on the specific allergen being tested. There is generally good predictive value (>90%) for common environmental allergens like grass and tree pollens and dust mites. Blood testing may be preferred when skin testing isn't feasible due to skin conditions or medication use.

Can I take antihistamines before the blood test?

Unlike skin testing, blood-based IgE testing is not typically affected by antihistamines, since it measures antibodies in the blood rather than skin reactions. However, it's always best to inform your healthcare provider about any medications you're taking, as they may have specific recommendations based on your individual situation.

What's the difference between seasonal and perennial allergies on this test?

Seasonal allergies are typically triggered by outdoor allergens like pollen from trees, grasses, and weeds that cause symptoms during specific times of the year, while perennial allergies are often caused by indoor allergens such as dust mites, mold, and animal dander that can cause year-round symptoms. This panel tests for both types to provide a comprehensive assessment.

Why might someone have a positive test but no symptoms?

It's possible to have a positive specific IgE result to an allergen that doesn't actually cause symptoms in the patient. The level of IgE present does not always correlate to the severity of an allergic reaction, and sensitization can occur without clinical symptoms. This is why test results should always be considered alongside symptom history and exposure patterns.

How often should environmental allergy testing be repeated?

The frequency of retesting depends on individual circumstances and symptoms. Generally, environmental allergy panels don't need to be repeated frequently since sensitivities tend to be relatively stable over time. However, retesting might be considered if there are significant changes in symptoms, new environmental exposures, or if considering immunotherapy treatment.

Can children have this test done?

IgE testing can be performed at any age, though reference ranges may vary slightly based on the individual's age. Environmental allergy testing in children can be particularly helpful when skin testing is difficult to perform or when trying to identify triggers for pediatric asthma or eczema.

Allergy

Environmental Allergy Panel (Trees, Grasses, Molds, Dust)

Identifies specific IgE antibodies to common environmental allergens including trees, grasses, molds, and dust mites.

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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.

Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.

This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.

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What this test measures

This panel measures specific IgE antibodies the immune system produces in response to common environmental allergens, including tree and grass pollens, mold spores, dust mite proteins, and other airborne triggers. In individuals with environmental allergies, the immune system overreacts to these ordinarily harmless substances by generating IgE antibodies that bind to immune cells and trigger inflammatory responses upon re-exposure.

The panel assesses antibody responses to dozens of common triggers and ranks each on a class scale from 0 (no detectable reactivity) to 6 (very high reactivity). This specificity is clinically useful because it can identify which particular allergens are driving symptoms such as sneezing, nasal congestion, watery or itchy eyes, postnasal drip, or respiratory difficulty. Pinpointing the responsible allergens helps guide targeted avoidance strategies and, when appropriate, immunotherapy (allergy shots or sublingual tablets) designed to desensitize the immune system to the specific triggers identified.

What's included

Tree pollens (birch, oak, maple, pine, cedar, cottonwood, elm, ash)

Grass pollens (timothy, bermuda, rye)

Mold allergens (Alternaria, Aspergillus, Cladosporium, Penicillium)

Dust mite allergens (Dermatophagoides pteronyssinus, D. farinae)

Environmental allergens (cockroach, mouse epithelium)

Who should consider this test

You might consider this test if you are experiencing any of the following:

Individuals experiencing seasonal allergy symptoms such as sneezing, runny nose, itchy eyes, or congestion that worsen during specific times of year
Those with year-round respiratory symptoms including nasal congestion, coughing, or wheezing that may be triggered by indoor allergens
People with suspected environmental triggers for asthma, eczema, or other allergic conditions who want to identify specific sensitivities
Individuals considering allergen avoidance strategies or immunotherapy treatment and need to identify specific environmental triggers
Those with family history of environmental allergies who want to understand their own potential sensitivities

What to expect

Preparation

No fasting required. Antihistamines may affect results, so individuals should consult with their healthcare provider about temporarily discontinuing these medications before testing if recommended.

Sample Type

A blood sample is collected from a vein in the arm using a standard needle and collection tube.

Collection

The blood draw typically takes just a few minutes and can be completed at any patient service center with no doctor visit required.

Turnaround

Results are typically available within 2-5 business days and will be provided through a secure online portal.

Understanding your results

Results are reported as specific IgE concentrations for each allergen tested, along with a class rating indicating the degree of sensitization. A positive result confirms that the immune system has produced IgE antibodies against a particular allergen (sensitization), but the antibody level does not always predict the type or severity of symptoms upon exposure. Some individuals with high IgE levels to a specific allergen experience mild symptoms, while others with lower levels may react more strongly. Healthcare providers interpret results alongside symptom patterns, exposure history, seasonal timing, and clinical examination to build an accurate picture of which allergens are clinically relevant.

Population	Reference Range	Notes
All Ages	<0.35 kU/L (Class 0)	Normal/negative result indicating no detectable sensitization to the specific allergen
All Ages	0.35-0.70 kU/L (Class 1)	Low positive result indicating possible sensitization
All Ages	0.70-3.50 kU/L (Class 2)	Moderate positive result indicating probable sensitization
All Ages	>3.50 kU/L (Class 3+)	High positive result indicating definite sensitization with increasing levels correlating with higher classes

Reference ranges shown are general guidelines. Your lab report will include the specific reference range used by the laboratory that processed your sample, which is the authoritative range for interpreting your results.

What does a “Low” result mean?

Results below 0.35 kU/L are considered normal and suggest that the individual is unlikely to have a clinically significant sensitivity to that particular allergen. However, a normal level of specific IgE may not completely exclude allergic disorders, particularly if there is a strong clinical history of symptoms related to the tested allergen. In some cases, individuals may experience allergic-type symptoms due to non-IgE mediated mechanisms or sensitivities to allergens not included in the panel.

What does a “High” result mean?

Elevated specific IgE levels typically indicate that the immune system has become sensitized to particular environmental allergens and may produce allergic reactions upon exposure. High results for seasonal allergens like tree or grass pollens often suggest seasonal allergies, while elevated levels for perennial allergens such as dust mites or molds may indicate year-round sensitivities. However, it's important to understand that elevated IgE levels don't always correlate directly with symptom severity, and some individuals may have positive tests without experiencing noticeable allergic reactions.

Privacy & confidentiality

All test orders are authorized and results reviewed by an independent, board-certified physician who is not the patient's personal doctor. At LevelPanel, we understand that many individuals prefer to keep their health information private, including allergy testing results. Your Environmental Allergy Panel results are completely confidential and are not reported to your doctor unless you choose to share them. The test results are not part of your medical records and will not appear on insurance statements or explanation of benefits (EOB) forms. We use secure, encrypted systems to protect your personal health information, and results are only accessible through your private online account. Your employer, insurance company, or anyone else cannot access your results without your explicit permission. This privacy protection allows you to understand your environmental sensitivities without concerns about impacts on insurance coverage or employment. No doctor visit is required to order this test, giving you complete control over your health information and testing decisions.

Frequently asked questions

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Last reviewed: April 2026

CPT Code: 86003

This test may not be available in: NY, NJ, RI

This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.

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View at Quest View at LabCorp

LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.

Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.

This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.

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