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Substance concentration of a specific protein in serum/plasma (e.g., a marker related to protein metabolism or renal function)

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

This test measures the amount of a particular protein in your blood, which may help assess how well your body is processing proteins or check for kidney function.

Quick summary

["This test helps doctors understand protein levels that could affect health or disease."]

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

Key facts at a glance

LOINC
70101-1
Short code
MTX sp4 SerPl-sCnc
Synonyms
MTX sp4 SerPl-sCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if they suspect issues like kidney disease, protein metabolism problems, or other conditions affecting protein balance in your blood.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast or avoid certain foods for a few hours before the draw, depending on the reason for testing.

How the Test Works

A small amount of blood is drawn from a vein in your arm. The blood is then processed to separate the serum or plasma, where the protein concentration is measured using a specialized lab technique.

What the Results Mean

Results are compared to standard ranges for this protein. Abnormal levels may signal conditions like kidney disease, protein loss, or other metabolic issues that require further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What does an abnormal result mean?
An abnormal result may suggest conditions like kidney problems, protein loss in urine, or other metabolic issues. Your doctor will discuss these findings with you and may recommend further tests or treatments.
How often should I get this test?
The frequency depends on your health condition and why the test was ordered. Your doctor will determine how often you need follow-up testing based on your individual needs.
Can I eat or drink anything before the test?
Follow your doctor’s instructions—some tests require fasting or avoiding certain foods, while others do not. Always check with your healthcare provider before the test.
  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 16, 2026. · Read our editorial policy