Melon-Specific IgG, Qualitative — Radioallergosorbent (RAST) Method (Deprecated)
A deprecated qualitative blood test for antibodies directed against melon. It is not a standard test for diagnosing food allergy.
["Detection of melon-specific IgG shows immune exposure but does not by itself confirm a melon allergy."]
Key facts at a glance
- LOINC
- 21136-7
- Short code
- Deprecated Melon IgG RAST Ql
- Synonyms
- Deprecated Melon 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 melon-specific IgG antibodies in a blood sample using a radioallergosorbent test, or RAST, method. The result is qualitative, meaning it reports whether the antibodies were detected.
Why might I need this test?
Melon-specific IgG testing was historically offered to evaluate possible food sensitivities. This test is deprecated and is not generally recommended for diagnosing food allergy or determining whether avoiding melon is medically necessary.
How is the test performed?
A blood sample is tested in a laboratory using a RAST-type method that measures antibodies against melon proteins. The laboratory reports the result as detected or not detected, sometimes with additional interpretation.
How do I prepare for the test?
No special preparation is usually listed for this test. Because the test is deprecated, contact the laboratory or your clinician to confirm that it is still available and follow their collection instructions.
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.
Detected melon-specific IgG may indicate previous exposure or an immune response to melon proteins. It can occur in people with or without symptoms and does not establish that melon is causing an allergic reaction. Food-specific IgG results should not be used alone to diagnose allergy, and an evaluation by a qualified clinician is recommended.
Short name
Melon-Specific IgG (RAST)
Frequently asked questions
Does a positive melon-specific IgG result mean I am allergic to melon?
Why is this test marked as deprecated?
What should I do if I think I react to melon?
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