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Serum or Plasma Ragweed Pollen Immunoglobulin E (IgE) Level

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of Immunoglobulin E (IgE), a type of antibody, in your blood that reacts to ragweed pollen. It helps identify if you have an allergic reaction to ragweed.

Quick summary

["IgE levels may indicate ragweed allergies and guide allergy treatment planning."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
48256-2
Short code
Common Ragweed LR-mCnc
Synonyms
Common Ragweed LR-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like sneezing, itching, or a runny nose during ragweed season (typically late summer to early fall). It can also be used to diagnose allergies or monitor treatment responses in people with ragweed sensitivities.

What to Expect Before the Test

No special preparation is needed. You may have a simple blood draw from a vein in your arm. If testing is done on a saliva sample, you might be asked to collect a sample at home or in a clinic.

What the Results Mean

High IgE levels to ragweed pollen suggest an allergic reaction. However, elevated levels alone don’t confirm an allergy—other tests (like skin prick tests) may be needed for diagnosis. Results are often interpreted by a healthcare provider in the context of your symptoms and medical history.

Common Causes of Ragweed Pollen IgE Testing

This test is most commonly performed if you experience seasonal allergies, have a history of ragweed exposure, or if allergists suspect ragweed as a trigger for your symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Ragweed Pollen IgE Levels Play a Role in Allergy Diagnosis and Management

Short name

Ragweed Pollen IgE

Frequently asked questions

What does a high or low IgE level mean?
A high IgE level directed toward ragweed pollen strongly suggests an allergic reaction to the plant. However, IgE levels alone are not definitive for allergy diagnosis. They are often used alongside other tests, such as skin tests or allergy challenge tests, to confirm allergies and guide treatment plans like allergy shots or medications.
Can IgE levels change over time?
Yes, IgE levels can fluctuate. They may rise during ragweed season if your body is reacting to pollen exposure. Over time, treatment (like allergy immunotherapy) may reduce IgE levels or change their reactivity to specific allergens.
Is this test covered by insurance?
Coverage depends on your insurance plan and reason for testing. If your healthcare provider orders this test for an allergy diagnosis or management, check with your insurer for details. Some plans may require prior authorization for allergy-related tests.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy