Green Pepper-Specific IgG Antibody, Qualitative (Deprecated RAST)
A qualitative blood test for green pepper-specific IgG antibodies. This legacy listing may be outdated; confirm the analyte and method with the laboratory.
["A positive result shows a green pepper-specific IgG response but does not by itself diagnose food allergy."]
Key facts at a glance
- LOINC
- 21452-8
- Short code
- Deprecated Green Pepper IgG RAST Ql
- Synonyms
- Deprecated Green Pepper 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 green pepper proteins in a blood sample. It reports whether green pepper-specific IgG antibodies were detected. The test listing is marked as deprecated, and its RAST wording is normally associated with IgE testing, so the exact laboratory method should be confirmed.
Why might I need this test?
It may have been ordered to evaluate an immune response to green pepper. Food-specific IgG testing is not a standard way to diagnose food allergy and is generally less useful than a clinical allergy evaluation.
How is the test performed?
A blood sample is tested with green pepper material to determine whether matching IgG antibodies are present. The result is generally reported as detected or not detected, although the laboratory's exact procedure and specimen should be verified.
How do I prepare for the test?
No special preparation is usually required for this type of antibody test. Follow the laboratory's instructions and do not stop prescribed medicines 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.
◆Associated findings1
Short name
Green Pepper IgG Antibody, Qualitative
Frequently asked questions
Does a positive result mean I am allergic to green pepper?
Can this test rule out a green pepper allergy?
Why is this test listed as 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