Food Allergen-Specific IgE, 74-Allergen Panel (RAST)
A blood test that measures IgE antibodies directed against a panel of 74 food allergens to help identify possible food-allergy sensitization.
["Results can show which foods may trigger an IgE-mediated allergy, but they must be interpreted alongside your symptoms and medical history."]
Key facts at a glance
- LOINC
- 82076-1
- Short code
- Food Allerg Mix74 IgE RAST
- Synonyms
- Food Allerg Mix74 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 broad screening test measures food-specific IgE antibodies in a blood sample. It is sometimes called a RAST panel because RAST is an older term for testing allergen-specific antibodies.
Why might I need this test?
A clinician may order it to help evaluate suspected food allergies when symptoms include hives, swelling, wheezing, vomiting, or other reactions after eating. It may also be used when the suspected trigger is unclear.
How is the test performed?
A blood sample is collected and analyzed for IgE antibodies to multiple food allergens. Because this is a large screening panel, positive results may be followed up with more targeted testing or an allergy evaluation.
How do I prepare for the test?
No special preparation is usually required. Tell the clinician about your symptoms, suspected foods, allergic reactions, medications, and any recent allergy testing, because these details affect interpretation.
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 may indicate sensitization to the corresponding food. A positive result does not by itself confirm a clinical food allergy, and some people have positive results without symptoms. Results should be interpreted by a clinician using your history, examination, and, when appropriate, skin-prick testing or supervised food testing.
Short name
74-food allergen IgE panel
Frequently asked questions
Does a positive result mean I am allergic to that food?
What symptoms can food allergies cause?
Should I stop eating foods because of 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