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Qualitative Analyte Test, Specimen Unspecified (Deprecated Test)

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

A deprecated laboratory test that reports whether an analyte is present. The specific analyte and specimen cannot be identified reliably from the supplied slug.

Quick summary

["This qualitative test indicates whether a particular substance is detected, but the ordering clinician must identify its clinical purpose."]

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

Key facts at a glance

LOINC
15550-7
Short code
Deprecated A niger IgE RAST Ql
Synonyms
Deprecated A niger IgE 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, meaning it generally reports whether a specified substance is present or detected rather than providing a measured concentration. The test has been deprecated, and the supplied information does not reliably identify the analyte or specimen.

Why might I need this test?

Qualitative tests may be used to screen for or confirm the presence of a substance, such as an antigen, antibody, protein, or other marker. The reason for testing depends on the exact analyte and the clinical question your healthcare professional is trying to answer.

How is the test performed?

A laboratory professional analyzes the specimen ordered by your clinician and compares the result with the test's expected pattern. Depending on the analyte, the laboratory may use an immunoassay, chromatography, or another qualitative method.

How do I prepare for the test?

Preparation varies with the specimen and analyte, which cannot be confirmed from the test slug. Follow your clinician's or laboratory's instructions about fasting, medication use, and sample collection; if no instructions were provided, contact the ordering office before the test.

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

Qualitative analyte test

Frequently asked questions

Does a qualitative result provide a numeric concentration?
Usually not. A qualitative result generally reports presence, absence, or a positive, negative, or indeterminate status, although some laboratories may include additional information.
What does a not-detected result mean?
It means the laboratory did not detect the target substance using the test's method. It does not necessarily exclude the condition or substance completely, particularly if collection timing or specimen quality was inappropriate.
Why was this test deprecated?
A test may be deprecated because it has been replaced by a newer method, is no longer routinely performed, or is considered obsolete. Your clinician can determine whether another test is more appropriate.
  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