Mung Bean-Specific IgG Antibody, Qualitative — Radioallergosorbent Test (RAST)
A qualitative blood test that detects antibodies against mung bean. It may document prior exposure but does not by itself diagnose a mung bean allergy.
["A positive result shows that mung bean-specific IgG antibodies are present, which usually indicates prior exposure."]
Key facts at a glance
- LOINC
- 21100-3
- Short code
- Deprecated Mung Bean IgG RAST Ql
- Synonyms
- Deprecated Mung 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 mung bean proteins in a blood sample. It is reported as positive or negative rather than as a measured concentration.
Why might I need this test?
It may be used to document prior exposure to mung bean or help evaluate a suspected food-related reaction. Results must be interpreted with your symptoms, medical history, and other allergy testing.
How is the test performed?
A blood sample is collected and tested in the laboratory using a radioallergosorbent method. The laboratory reports whether mung bean-specific IgG antibodies were detected.
How do I prepare for the test?
No special preparation is usually required, and fasting is generally unnecessary. Tell your healthcare professional about your symptoms, mung bean exposure, and any relevant allergies or medications.
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 the blood contains mung bean-specific IgG antibodies, which commonly reflects previous exposure or sensitization. IgG antibodies do not by themselves prove an immediate IgE-mediated allergy or show that mung bean is causing your symptoms. A clinician or allergist should interpret the result alongside your history and, when appropriate, other allergy tests.
Short name
Mung bean-specific IgG (RAST)
Frequently asked questions
What does a positive result mean?
Can this test diagnose a mung bean allergy?
Is fasting required before this 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