Food Allergen Mix 75 IgE, Radioallergosorbent Test (RAST)
A blood test that measures IgE antibodies to a panel of common food allergens. It can help identify possible food sensitivities when the results are interpreted with your symptoms and medical history.
["This panel screens for food-specific IgE antibodies but does not by itself confirm a food allergy."]
Key facts at a glance
- LOINC
- 82558-8
- Short code
- Food Allerg Mix75 IgE RAST
- Synonyms
- Food Allerg Mix75 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 food-specific IgE antibodies against a panel of 75 allergens using a radioallergosorbent test, or RAST. The allergens included may vary by laboratory.
Why might I need this test?
A clinician may order it to evaluate possible food allergies or unexplained symptoms such as hives, swelling, wheezing, vomiting, or abdominal discomfort after eating certain foods.
How is the test performed?
A blood sample is collected, and the laboratory tests the serum for IgE antibodies against the food allergens in the panel. The results are reported for individual allergens or as panel results, depending on the laboratory.
How do I prepare for the test?
Fasting is usually not required. Antihistamines and other medicines may affect the results, so tell your clinician about all medicines and supplements you take and follow any instructions about stopping them.
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 food-specific IgE suggests immune sensitization to one or more tested foods. A positive result does not always mean a clinically important allergy, because some people have antibodies without symptoms. Results should be interpreted alongside your exposure history, symptoms, and examination, and your clinician may recommend confirmation testing or an elimination diet.
Short name
Food allergen IgE panel
Frequently asked questions
Does a positive result mean I have a food allergy?
Why is the test called a panel?
Can medicines affect the results?
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