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Total Walnut IgE (Immunoglobulin E) Level

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

This test measures the amount of Immunoglobulin E (IgE) in your blood. IgE is a type of antibody that plays a role in allergic reactions.

Quick summary

["IgE levels can help identify allergies or immune responses."]

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

Key facts at a glance

LOINC
41198-3
Short code
Walnut IgE/IgE total %
Synonyms
Walnut IgE/IgE total %
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Does This Test Measure?

IgE is a protein produced by your immune system in response to allergens (substances like pollen, dust, or certain foods). High levels may suggest allergies, asthma, or other allergic conditions. This test specifically looks at the total amount of IgE in your blood, not specific allergens.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like sneezing, itching, rash, or breathing difficulties that suggest allergies. It can also be used to monitor conditions like allergic asthma or chronic urticaria (hives).

How Is the Test Done?

A small sample of blood is drawn from a vein, usually in your arm. The blood is then sent to a lab for testing. The lab uses a method called immunoassay to detect and measure IgE levels.

What Are Possible Results?

Results are typically reported in International Units per milliliter (IU/mL). Higher than normal levels may indicate an increased risk of allergic reactions, while lower levels may suggest a reduced immune response to allergens.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total IgE (serum/plasma)

Frequently asked questions

How Often Will I Need This Test?
This test is usually done once or occasionally, depending on your symptoms and medical needs. Follow-up tests may be needed if your condition changes or if treatment is being adjusted.
What Are the Possible Risks or Side Effects?
The most common side effect from a blood draw is mild bruising, swelling, or soreness at the injection site. Rarely, you might experience a slight reaction to the needle. Most side effects are minor and go away quickly.
Can I Prepare for This Test?
No special preparation is needed for this test. You can eat, drink, and take your usual medications as usual. If you are on blood-thinning medications, let your healthcare provider know before the test.
  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