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Serum or plasma mass concentration of a protein measured by immunoassay (e.g., for qualitative or semi-quantitative screening)

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

This test measures the amount of a specific protein in your blood, often used to check for certain conditions or monitor treatment.

Quick summary

["It helps identify protein-related health concerns or assesses how your body is responding to medical treatment."]

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

Key facts at a glance

LOINC
2963-7
Short code
GH SerPl-mCnc
Synonyms
GH SerPl-mCnc
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 an issue with protein levels, such as kidney disease, liver problems, or certain infections. It could also be part of routine monitoring for conditions like autoimmune disorders or after surgery.

What to Expect Before the Test

You may be asked to fast for a few hours before the test, depending on the lab’s instructions. Bring any medications you’re currently taking, as some may affect results. Avoid smoking or consuming alcohol for a specified period beforehand.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but the process is quick and usually painless. The blood sample is then sent to the lab for analysis.

What the Results Mean

Results may indicate whether your protein levels are within normal ranges or if they are elevated or low, which can signal underlying health concerns. Your provider will discuss these findings with you in detail.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein Screening (Serum/Plasma)

Frequently asked questions

How long will I have to wait for my results?
Results are typically available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will contact you once they are ready to discuss your results.
What should I do if my results are abnormal?
If your results show any deviations from expected levels, your provider will guide you on next steps, which may include additional testing, lifestyle changes, or further medical evaluation to understand and address the cause.
Can I eat or drink before this test?
Follow your healthcare provider’s or lab’s specific instructions, but generally, fasting may be required for 8 to 12 hours before the test. Avoid caffeine or alcohol for the recommended period to ensure accurate results.
  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