Ragweed Pollen Immunoglobulin E (IgE) in Serum
This test measures the level of Immunoglobulin E (IgE), a type of antibody your body produces in response to allergens like ragweed pollen.
["IgE levels help identify potential allergic reactions to ragweed pollen."]
Key facts at a glance
- LOINC
- 7645-5
- Short code
- CANYONRW
- Synonyms
- Canyon Ragweed IgE Qn
- Category
- chemistry
- Sample
- serum
- Container
- Red-top serum separator tube (SST) or plain red-top tube
- Units
- N/A
- Ref low
- 0
- Ref high
- 0.34
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Immunoassay (e.g., Fluorescent Enzyme Immunoassay or Chemiluminescent Immunoassay)
- CPT
- 86003
- SNOMED
- 395127008
- Specimen volume
- 1 mL serum (minimum 0.5 mL)
- Stability
- Stable for 7 days at 2-8°C; for longer storage, freeze at -20°C or below
- Hemolysis max
- 100
- Lipemia max
- 100
- Icterus max
- 50
- TAT
- 24–72 hours
- Order
- routine
What Does This Test Measure?
IgE is a protein produced by your immune system when it detects allergens. High levels of IgE specific to ragweed pollen may suggest an allergic sensitivity to this common allergen, often linked to seasonal allergies or hay fever.
Why Might You Need This Test?
Your healthcare provider may recommend this test if you experience symptoms like sneezing, itching, or a runny nose during ragweed season, or if you have a history of allergic reactions to pollen.
How Is the Test Performed?
A blood sample is taken from a vein in your arm. The blood is then sent to a lab for analysis to measure the specific IgE antibodies against ragweed pollen.
What Are Possible Results?
Results are typically reported as a numerical value representing the concentration of IgE antibodies in your blood. While reference ranges can vary, elevated levels may indicate an allergic reaction potential to ragweed pollen.
Reference range
Negative: <0.35 kU/L; Equivocal: 0.35-0.69 kU/L; Positive: 0.70-3.49 kU/L; Strongly Positive: 3.50-17.49 kU/L; Very Strongly Positive: ≥17.50 kU/LN/A
No special preparation required. Patient should inform provider of all current medications, including antihistamines, though these do not typically affect IgE antibody levels
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
IgE to Ragweed Pollen
Frequently asked questions
Why do I need this test?
What does a high IgE level mean?
Can I take anything before the test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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 15, 2026. · Read our editorial policy