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Food Allergen Mix 71 IgE (RAST), Serum

Published: August 9, 2026Updated: August 17, 2026

A blood test that measures IgE antibodies to a panel of food allergens. It helps identify possible food sensitization but does not by itself confirm a food allergy.

Quick summary

["Elevated results suggest possible sensitization to one or more foods in the panel, but allergy symptoms and clinical history are needed for diagnosis."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
82072-0
Short code
Food Allerg Mix71 IgE RAST
Synonyms
Food Allerg Mix71 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 is an allergy blood test that measures allergen-specific IgE antibodies to a group of foods called “Food Allergen Mix 71.” The panel may also be described as a specific IgE or RAST test.

Why might I need this test?

Your clinician may order it to help investigate suspected food allergies, especially when symptoms occur after eating but the suspected food is unclear. Results can help guide further evaluation, allergy testing, and dietary decisions.

How is the test performed?

A blood sample is collected through a vein, and the serum is tested in the laboratory for IgE antibodies to the foods included in the panel. The foods represented in Mix 71 can vary by laboratory, so review the test report for the specific allergens tested.

How do I prepare for the test?

Fasting is usually not required. Keep eating your usual diet unless your clinician instructs otherwise, and tell the clinician about any allergy medicines you take because some antihistamines may affect the interpretation of skin-prick testing rather than this blood test.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

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

Food allergen mix 71 IgE panel

Frequently asked questions

Does a positive result mean I am allergic to every food in the panel?
No. Each food is evaluated separately, and a positive result indicates possible sensitization rather than necessarily causing an allergy. Your clinician will interpret each result in the context of your symptoms and medical history.
Is this test the same as a skin-prick test?
No. This test measures allergen-specific IgE in blood, while a skin-prick test measures an immediate skin reaction. Your clinician may use one or both when evaluating suspected food allergy.
Should I stop eating a food because of a positive result?
Do not change your diet based only on this test, especially if avoiding a food could cause nutritional problems. Discuss the result with your clinician, particularly if you have a history of severe allergic reactions.
  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 17, 2026. · Read our editorial policy