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Food and Allergen Mix Immunoassay (Screening)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of common food allergens in your blood using a screening immunoassay method. It helps identify potential allergens that may trigger reactions.

Quick summary

["A simple blood test to detect common food allergens that could affect you."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
15220-7
Short code
Food Allerg Mix A IgE Ql
Synonyms
Food Allerg Mix A IgE Ql
Category
glucose
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
multidisk
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 This Test Measures

The test screens for antibodies to a panel of common food allergens, including but not limited to milk, eggs, peanuts, tree nuts, wheat, soy, fish, and shellfish. Immunoassay detects specific IgE antibodies, which are often present in people with known allergies.

Why It’s Done

Your healthcare provider may recommend this test if you have symptoms like hives, swelling, difficulty breathing, or digestive issues after eating certain foods. It can also be used as part of an allergy evaluation before trying allergen-specific treatments.

How the Test Works

A small blood sample is taken, and the serum/plasma is analyzed using an immunoassay method. This detects IgE antibodies linked to allergens, indicating a possible allergic reaction to those foods.

What to Expect Before the Test

No special preparation is needed. You may have a slight bruise or soreness at the injection site, but this is normal. Avoid eating or drinking anything for a few hours before the test if instructed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive results suggest a potential allergy to the tested foods, but they do not confirm a diagnosis. False positives can occur, so further evaluation (like skin prick tests or elimination diets) may be needed. This test is primarily a screening tool to guide further testing or management plans.

Short name

Food Allergen Mix Screen

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of IgE antibodies to one or more of the screened allergens, which may suggest an allergic reaction risk. However, this does not confirm a diagnosis alone—additional testing or medical evaluation is often required.
Can I eat or drink anything before the test?
Check with your healthcare provider for specific instructions, but generally, avoid food/drinks for a few hours before testing to ensure accurate results.
Is this test covered by insurance?
Coverage depends on your insurance plan and medical necessity. Confirm with your provider or insurance company before scheduling to avoid unexpected costs.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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 16, 2026. · Read our editorial policy