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West Wheat Grass-Specific IgE, Serum

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

This blood test checks for IgE antibodies directed against west wheat grass, which may help evaluate a suspected grass-pollen allergy.

Quick summary

["A positive result supports an allergy to west wheat grass but must be interpreted with symptoms and other allergy testing."]

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

Key facts at a glance

LOINC
24516-7
Short code
Deprecated West wheatgrass IgE RAST Ql
Synonyms
Deprecated West wheatgrass IgE RAST Ql
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
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 test measures allergen-specific IgE antibodies to west wheat grass in blood. IgE is an immune-system protein that can form in response to a particular allergen.

Why might I need this test?

Your clinician may order this test if you have sneezing, congestion, itchy or watery eyes, wheezing, or other symptoms that appear during exposure to grass or in certain seasons.

How is the test performed?

A blood sample is collected and tested in a laboratory for antibodies specific to west wheat grass. The result is reported as a qualitative or graded laboratory value, depending on the testing method used.

How do I prepare for the test?

No special preparation is usually needed for this blood test. Tell your clinician about your symptoms, allergy history, medications, and any recent immunotherapy, because these details may affect interpretation.

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

West wheat grass IgE

Frequently asked questions

What does a positive result mean?
It means your blood contains IgE antibodies directed against west wheat grass. This supports possible sensitization but does not confirm that the antibody is causing your symptoms without clinical context.
Can this test diagnose a grass allergy?
It can provide evidence of a specific allergic sensitization. Your clinician will interpret it with your exposure history, symptoms, and other allergy tests to make a diagnosis.
Does a negative result rule out a grass allergy?
No. A negative result makes this particular allergy less likely, but some people with an allergy may not have detectable IgE or may react to other grass allergens.
  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