Serum Biggest Serum Protein Mass Concentration (deprecated)
This test was previously used to measure the total amount of protein in your serum, though it is no longer routinely performed. Proteins in blood include albumin, globulins, and other substances that help with transport, immunity, and fluid balance.
["This test was historically used to assess overall protein levels but is no longer standard in modern testing."]
Key facts at a glance
- LOINC
- 17631-3
- Short code
- Deprecated S pneum36a+6b IgG Ser-aCnc
- Synonyms
- Deprecated S pneum36a+6b IgG Ser-aCnc
- Category
- coagulation
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- 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 This Test Was Used For
Before being deprecated, this test helped clinicians evaluate protein status, which can be important in diagnosing conditions like malnutrition, kidney disease, or liver problems. It was often used alongside other protein-related tests, such as albumin or total protein measurements.
Why It’s No Longer Commonly Used
Modern medicine relies more on specific protein measurements (like albumin or globulins) rather than a broad, less precise total protein test. Advances in lab technology have made more targeted tests more accurate and clinically useful.
What You Should Ask Your Doctor Instead
If you have concerns about protein levels, your doctor may recommend simpler or more specific tests, such as albumin or total protein tests, depending on your symptoms or medical history.
Common Conditions This Test Might Have Helped Identify
This test could have been used to help detect conditions affecting protein production or retention, such as severe malnutrition, chronic liver disease, or kidney dysfunction. However, newer tests provide clearer insights into these conditions.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Why was this test marked as deprecated?
What should I expect if I had this test before?
Could this test still be used in special cases?
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 16, 2026. · Read our editorial policy