Total IgE (Immunoglobulin E) Level
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.
["IgE helps identify allergies or immune responses to certain triggers."]
Key facts at a glance
- LOINC
- 61314-1
- Short code
- Sheep Wool IgE/IgE total %
- Synonyms
- Sheep Wool 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
Why Might You Need This Test?
Your doctor may order this test to diagnose allergies, check for allergic conditions like asthma or eczema, or evaluate immune system responses to infections or medications. It can also help monitor conditions like parasitic infections or certain autoimmune disorders.
What Does the Test Involve?
A small blood sample is taken from a vein, usually in your arm. The sample is then sent to a lab for analysis using an immunoassay method to measure IgE levels.
What to Expect Before the Test
No special preparation is needed for this test. You can eat, drink, or take your usual medications as scheduled. If you’re on blood thinners, let your doctor know before the test.
What to Expect After the Test
You may feel slight discomfort or bruising at the injection site, but this usually fades quickly. Rest for a few minutes after the blood draw before resuming your normal activities.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
IgE Total
Frequently asked questions
IgE levels can be elevated in people with allergies, asthma, or certain infections. High IgE might indicate an overactive immune response to allergens, while very low levels could suggest immune deficiencies or other health concerns. Your doctor will interpret results in the context of your symptoms and medical history.
Normal IgE levels vary widely among individuals. There are no strict reference ranges for everyone, and your doctor will use your specific results to guide diagnosis and treatment.
Yes, IgE levels can fluctuate depending on factors like allergies, infections, medications, or immune responses. Regular monitoring may be needed if you have ongoing health conditions.
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 16, 2026. · Read our editorial policy