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Serum Biggest Serum Protein Mass Concentration (deprecated)

Published: August 9, 2026Updated: August 16, 2026

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.

Quick summary

["This test was historically used to assess overall protein levels but is no longer standard in modern testing."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

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?
This test was removed from routine use because it was too broad and lacked specificity. Modern medicine prefers tests that measure individual proteins or protein groups for more accurate and actionable results.
What should I expect if I had this test before?
If you received results from this test in the past, they may no longer be relevant for current medical decisions. Your doctor may review your medical history and recommend updated tests if needed.
Could this test still be used in special cases?
While rarely used today, some historical or research settings might reference this test. Always discuss any past test results with your healthcare provider to understand their relevance to your current health.
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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 16, 2026. · Read our editorial policy