Skip to content

Serum Protein and Immunoglobulin, Qualitative — Deprecated

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

A qualitative blood test that evaluates overall protein and immunoglobulin patterns; results are interpreted by your clinician.

Quick summary

["This test provides a general assessment of the proteins and antibodies present in your blood."]

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

Key facts at a glance

LOINC
26048-9
Short code
Deprecated Canary Serum Prot IgE RAST Ql
Synonyms
Deprecated Canary Serum Prot 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 qualitative serum test evaluates the overall pattern of proteins and immunoglobulins, the antibodies made by the immune system. It is marked as deprecated, so it may not be available or may have been replaced by a more specific laboratory test.

Why might I need this test?

Clinicians may use this type of testing when symptoms suggest an immune, liver, kidney, or nutritional disorder. It may also be considered when an abnormal protein pattern needs to be identified.

How is the test performed?

A blood sample is collected, and the serum portion is examined in the laboratory. Depending on the laboratory method, proteins or immunoglobulins may be separated or tested using antibodies, and the findings are reported as a pattern rather than as a simple positive or negative result.

How do I prepare for the test?

No special preparation is usually required for a routine serum protein or immunoglobulin test. Follow any instructions provided by the ordering clinician, particularly if the test is being performed as part of a larger panel.

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

Serum protein/immunoglobulin test

Frequently asked questions

Does this test diagnose a specific disease?
No. It identifies or describes a protein and immunoglobulin pattern, which your clinician will interpret using your medical history and other test results.
Why is the test described as deprecated?
Deprecated means the test may have been replaced, retired, or is no longer routinely offered. Ask your clinician whether a newer or more specific test is appropriate.
Is a blood draw the only requirement?
A blood sample is generally required to obtain serum. Most people do not need to fast, but follow the specific instructions given by the laboratory or ordering clinician.
  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