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Mandarin-Specific IgG Antibody, Qualitative (RAST) — Deprecated

Published: August 9, 2026Updated: August 17, 2026

A deprecated qualitative test that looks for IgG antibodies directed against mandarin; it does not by itself confirm mandarin allergy.

Quick summary

["A positive result shows detectable mandarin-specific IgG antibodies but does not necessarily mean you have an allergy."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
21552-5
Short code
Deprecated Mandarin IgG RAST Ql
Synonyms
Deprecated Mandarin 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 laboratory test that looks for IgG antibodies directed against mandarin. The test is listed as deprecated, so a clinician may recommend a more current allergy evaluation instead.

Why might I need this test?

It may have been ordered to evaluate a possible immune response to mandarin or to investigate reactions after eating it. A positive antibody result should be interpreted alongside your symptoms and medical history.

How is the test performed?

The laboratory analyzes a patient sample for antibodies that bind to mandarin allergen. The result is reported as detectable or not detectable rather than as a measured concentration.

How do I prepare for the test?

No special preparation is usually required, but follow the instructions provided by the ordering clinician and laboratory. Tell the clinician about food allergies, recent exposures, and any immunosuppressive medicines or treatments.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

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

Mandarin IgG RAST

Frequently asked questions

Does a positive result mean I am allergic to mandarin?
No. It shows detectable mandarin-specific IgG antibodies, which can occur with exposure and do not confirm an allergy. Your clinician should interpret it with your symptoms and other allergy test results.
Why is this test listed as deprecated?
Deprecated tests are no longer considered the preferred way to evaluate suspected food allergy. A clinician may recommend current allergy testing, such as mandarin-specific IgE testing or supervised skin-prick testing.
Do I need to avoid eating mandarin before this test?
Do not change your diet unless your clinician instructs you to. If you have had a recent severe reaction to mandarin, seek medical advice before consuming it again.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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