Grass Allergen Mix 6–Specific IgE, Serum — Radioallergosorbent Test (RAST)
A blood test that detects IgE antibodies to a mix of common grass allergens, helping evaluate possible grass-pollen allergy.
["A positive result suggests an immune sensitivity to one or more grass allergens in the tested mix."]
Key facts at a glance
- LOINC
- 82100-9
- Short code
- Grass Allerg Mix 6 IgE RAST
- Synonyms
- Grass Allerg Mix 6 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 test measures allergen-specific IgE antibodies against a mixture of common grass pollens in your blood. It is used to help identify whether grass allergens may be contributing to allergy symptoms.
Why might I need this test?
Your clinician may order this test if you have sneezing, nasal congestion, itchy or watery eyes, wheezing, or other symptoms that occur during grass-pollen seasons. It can help guide allergy management, including avoidance advice and decisions about further evaluation or immunotherapy.
How is the test performed?
A blood sample is drawn and the serum is analyzed for IgE antibodies to the grass allergens in the mix. This is an allergen-specific IgE test commonly described as a RAST or RAST-type assay.
How do I prepare for the test?
Fasting is usually not required. Tell your clinician about any allergy medicines, recent allergen exposure, and changes in symptoms; do not stop prescribed medications unless your clinician advises you to do so.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive result indicates that your immune system has formed IgE antibodies to one or more grass allergens in the tested mixture. This supports grass-pollen allergy and may help explain symptoms, but the result does not predict symptom severity by itself. A negative result means detectable sensitization was not found, although it does not completely exclude allergy.
Short name
Grass Allergen Mix 6 IgE
Frequently asked questions
Does a positive result mean I am allergic to grass pollen?
Can this test determine which grass allergen is causing my symptoms?
Do I need to avoid grass pollen if the result is positive?
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 17, 2026. · Read our editorial policy