Qualitative Serum Protein Test (Deprecated)
An older qualitative blood test used to assess the presence or pattern of serum proteins. The exact assay is unclear from the deprecated test code.
["This test checks for serum proteins, but a detected protein alone does not indicate disease."]
Key facts at a glance
- LOINC
- 15906-1
- Short code
- Deprecated Budgie Serum Prot IgE RAST Ql
- Synonyms
- Deprecated Budgie 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 is an older qualitative test performed on serum, the liquid portion of blood. It checks whether serum proteins are present and may provide information about an unexpected protein pattern.
Why might I need this test?
This test may have been ordered when a clinician suspected an unusual blood protein, often as part of a broader evaluation. Current laboratory testing may use more specific quantitative or protein-identification methods instead.
How is the test performed?
A blood sample is collected, and the serum is separated and examined using a laboratory method. The exact method and the type of protein result reported cannot be determined from the deprecated test code.
How do I prepare for the test?
Special preparation is not usually required for a routine serum protein test unless your clinician gives different instructions. Follow the laboratory's directions and tell the staff about any medicines or supplements you take.
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.
Most people have proteins in their serum, so a result showing that protein is present is not abnormal by itself. An unexpected protein pattern may occur with monoclonal protein disorders, inflammation, liver disease, or kidney disease and should be interpreted with other laboratory results. Depending on the finding, a clinician may order quantitative testing, serum protein electrophoresis, or immunofixation.
Short name
Serum protein test
Frequently asked questions
Does a positive result mean I have a serious illness?
Is this the same as a quantitative total serum protein test?
Why is this test marked 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