Weed Allergen Mix 5 IgE Antibodies, Serum
A blood test that measures IgE antibodies to a mixture of weed allergens, helping assess possible allergic sensitization.
["Detectable weed-specific IgE may indicate an immune response to weed allergens, but symptoms and exposure history are also needed."]
Key facts at a glance
- LOINC
- 82042-3
- Short code
- Weed Allerg Mix5 IgE RAST
- Synonyms
- Weed Allerg Mix5 IgE RAST
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- multidisk
- CPT
- 84484
- SNOMED
- 302774002
- 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
What is this test?
This blood test measures IgE antibodies against a mixture of weed allergens. The exact weeds included can vary by laboratory, so the test report or your healthcare professional can clarify the formulation.
Why might I need this test?
This test may be ordered if you have sneezing, congestion, itchy or watery eyes, wheezing, or hives after exposure to weeds, grasses, or outdoor plants. It may also be used to help identify suspected weed-related allergy symptoms.
How is the test performed?
A blood sample is collected and analyzed in the laboratory for allergen-specific IgE. It is an allergy blood test and does not require a skin-prick test or a deliberate allergen exposure.
How do I prepare for the test?
No special preparation is usually required. Tell your healthcare professional about any medicines you take, especially antihistamines, because they may affect other allergy testing but generally do not alter this serum IgE test.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Detectable IgE to the weed allergen mixture indicates sensitization, meaning the immune system has produced antibodies against one or more included weed allergens. A positive result does not by itself confirm that the tested weeds cause your symptoms; results should be interpreted with your exposure history and clinical findings. Absence of detectable IgE makes a symptom-producing allergy to the included weeds less likely.
Short name
Weed Allergen Mix 5 IgE
Frequently asked questions
Does a positive result mean I am allergic to weeds?
What symptoms can weed allergies cause?
Can I take my allergy medicine before this 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 17, 2026. · Read our editorial policy