Deprecated Oregano-Specific IgG Radioallergosorbent (RAST) Test, Qualitative
This marked-deprecated qualitative test measures IgG directed against oregano. A positive result may indicate exposure but does not by itself diagnose food allergy.
["A positive result shows an immune response to oregano but does not necessarily mean you have a clinically significant allergy."]
Key facts at a glance
- LOINC
- 21434-6
- Short code
- Deprecated Oregano IgG RAST Ql
- Synonyms
- Deprecated Oregano IgG 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 is a qualitative test for IgG antibodies directed against oregano. The test name is marked as deprecated, and food-specific IgG testing is not generally used to diagnose food allergy.
Why might I need this test?
It may have been ordered to evaluate an immune response to oregano or to investigate a suspected food-related reaction. Because the test is marked as deprecated, your clinician may recommend a more current evaluation.
How is the test performed?
A blood sample, usually serum, is tested with a RAST-type laboratory method that detects antibodies against oregano. The result is reported as positive or negative according to the laboratory's assay criteria.
How do I prepare for the test?
No special preparation is usually required. Follow your clinician's instructions, and do not stop any medicines unless your clinician specifically tells 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 IgG directed against oregano was detected, which may reflect prior exposure or a food immune response. It does not confirm IgE-mediated food allergy, food intolerance, or the cause of a reaction. If this test was ordered for allergy symptoms, discuss the result with your clinician because the test is deprecated and a current allergy evaluation is generally preferred.
Short name
Oregano-specific IgG test
Frequently asked questions
Does a positive result mean I am allergic to oregano?
Why is this test marked as deprecated?
Do I need to avoid oregano before the test?
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