Yellow Bean-Specific IgG Antibodies, Qualitative (RAST; Deprecated)
A qualitative blood test that detects antibodies directed against yellow bean, a food allergen. The test entry is marked deprecated.
["Detectable yellow bean-specific IgG suggests prior immune exposure but does not by itself confirm a food allergy."]
Key facts at a glance
- LOINC
- 21105-2
- Short code
- Deprecated Yellow Bean IgG RAST Ql
- Synonyms
- Deprecated Yellow Bean 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 test looks for IgG antibodies directed against yellow bean in a blood sample. RAST is a laboratory method used to detect antibodies to a specific allergen, and a qualitative result is generally reported as detected or not detected.
Why might I need this test?
It may be included in an evaluation of a possible food-related reaction or used to assess immune exposure to yellow bean. Yellow bean-specific IgG results should be considered together with your symptoms, medical history, and any other allergy testing.
How is the test performed?
A blood sample is tested with yellow bean allergen using the RAST method. The laboratory evaluates whether the sample contains antibodies that react with the allergen and reports the result qualitatively rather than providing a measured concentration.
How do I prepare for the test?
Special preparation is usually not required for this type of blood test. Follow the ordering clinician's instructions and tell the laboratory if you have recently received immunoglobulin treatment or take medicines that may affect antibody testing.
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 detectable result means that yellow bean-specific IgG antibodies were found, which can reflect previous exposure or a immune response. It does not by itself establish that yellow bean causes your symptoms. Results should be interpreted by a clinician alongside your reaction history and, when appropriate, testing for allergy-specific IgE.
Short name
Yellow bean-specific IgG antibodies
Frequently asked questions
Does a positive result mean I am allergic to yellow bean?
What does a negative result mean?
Why is the test marked deprecated?
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