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Grass Allergen Mix 3 IgE, Serum

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

A blood test that measures IgE antibodies to a mixture of grass allergens, helping evaluate possible grass-pollen allergy.

Quick summary

["Elevated IgE to the grass allergen mix may support a grass-pollen allergy, but results must be interpreted with your symptoms and medical history."]

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

Key facts at a glance

LOINC
82081-1
Short code
Grass Allerg Mix3 IgE RAST
Synonyms
Grass Allerg Mix3 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 blood test measures allergen-specific IgE antibodies against a mixture of grass allergens. IgE is an immune-system protein that can react with allergens such as grass pollen.

Why might I need this test?

Your clinician may order this test if you have symptoms such as sneezing, runny nose, itchy or watery eyes, cough, or wheezing that occur during grass-pollen seasons or after exposure to grass.

How is the test performed?

A blood sample is collected and tested in the laboratory for IgE antibodies to the grass allergen mixture. The result is reported as a concentration or activity level, depending on the laboratory method.

How do I prepare for the test?

No special preparation is usually required. Tell your clinician about any medicines you take, especially antihistamines, because they may affect allergy testing; do not stop prescribed medication without medical advice.

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

Grass Allergen Mix 3 IgE

Frequently asked questions

Does a positive result mean I am allergic to grass?
It indicates that your immune system has produced IgE antibodies to a tested grass allergen, which is consistent with sensitization. Your clinician will interpret the result in relation to your symptoms and exposure to grass.
Can this test identify exactly which grass allergen causes my symptoms?
Not by itself. This test uses a mixture of grass allergens, so component testing or evaluation of your specific exposure history may be needed to identify a particular trigger.
Does the IgE level show how severe my allergy is?
The IgE level indicates immune sensitization but does not reliably predict symptom severity. Your clinician should assess severity using your symptoms, examination, and other relevant findings.
  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