Food Allergen Mix 19 IgE Antibodies, Serum — Radioallergosorbent Test (RAST)
A blood test that measures IgE antibodies to a panel of food allergens to help evaluate possible food allergy.
["Elevated allergen-specific IgE can suggest food allergy sensitization but must be interpreted with symptoms and medical history."]
Key facts at a glance
- LOINC
- 82061-3
- Short code
- Food Allerg Mix19 IgE RAST
- Synonyms
- Food Allerg Mix19 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 laboratory panel measures IgE antibodies to several food allergens in blood. “Food Allergen Mix 19” identifies the particular allergen mix used by the laboratory, and the foods included should be confirmed on your test report.
Why might I need this test?
This test may be ordered if you have symptoms such as hives, swelling, abdominal pain, vomiting, wheezing, or other reactions after eating certain foods. It may also be used to screen for sensitization before a clinical allergy evaluation.
How is the test performed?
A blood sample is collected and analyzed for food-specific IgE antibodies. RAST is an older name for this type of testing; many laboratories now use a similar automated immunoassay.
How do I prepare for the test?
Fasting is usually not required. Continue taking medications unless your clinician instructs you otherwise, and tell the laboratory about any medicines or immune-related treatments that could 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.
Elevated IgE to a food allergen indicates that the immune system has developed sensitization to that food. It does not by itself prove that eating the food will cause an allergic reaction, because sensitization can occur without symptoms. Results should be reviewed with your clinician and interpreted alongside your exposure history, symptoms, and other allergy testing.
Short name
Food Allergen Mix 19 IgE
Frequently asked questions
Does a positive result mean I am allergic to that food?
Which foods are included in Food Allergen Mix 19?
Do I need to stop taking antihistamines 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