Tree Allergen Mix 3 IgE Antibodies, Serum (RAST)
A blood test that measures IgE antibodies to a laboratory-specific mixture of tree allergens to help evaluate possible allergic sensitization.
["Detected IgE antibodies may indicate an allergy or sensitization to one or more tree allergens, but results must be interpreted with symptoms and exposure history."]
Key facts at a glance
- LOINC
- 24490-5
- Short code
- Tree Allerg Mix3 IgE RAST
- Synonyms
- Tree Allerg Mix3 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 test measures allergen-specific IgE antibodies in a blood sample using a RAST-type approach. It tests a mixture of tree allergens; the exact allergens included in “Mix 3” may vary by laboratory.
Why might I need this test?
It may be ordered when a person has symptoms such as sneezing, wheezing, hives, or swelling after exposure to trees. Your clinician may also use it to identify whether tree allergens could be contributing to those symptoms.
How is the test performed?
A blood sample is drawn and analyzed for IgE antibodies against the allergens in the selected mixture. Because this is a mixture test, it may not identify the specific tree allergen responsible, so additional individual allergen testing may sometimes be needed.
How do I prepare for the test?
Fasting is usually not required, and you can generally continue your usual medicines. Antihistamines and other allergy treatments may affect results in some testing methods; tell your clinician what you take, and do not stop prescribed medicines unless instructed.
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.
◆Associated findings1
Short name
Tree Allergen Mix 3 IgE
Frequently asked questions
Does a positive result mean I am allergic to trees?
Can this test tell me which specific tree causes my symptoms?
Should I stop taking allergy medicine 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 17, 2026. · Read our editorial policy