Skip to content

Substance concentration of a specific protein in serum/plasma (e.g., a marker for protein-related conditions)

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

This test measures the amount of a particular protein in your blood, often used to check for conditions affecting protein levels or function.

Quick summary

["Understanding your protein levels can help diagnose or monitor health conditions."]

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

Key facts at a glance

LOINC
60623-6
Short code
Lnt-Sn-Ls Skull XR
Synonyms
Lnt-Sn-Ls Skull XR
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr-measured
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 conditions like kidney disease, liver problems, infections, or certain genetic disorders. It could also be part of routine monitoring for chronic illnesses or after a trauma or surgery.

How the Test Works

A small blood sample is taken, and the protein is measured using a specialized lab technique (likely immunoassay or similar). The test identifies and quantifies the protein concentration in your bloodstream.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours if the test involves a different specimen type. Avoid smoking or certain medications for 24 hours before testing if instructed.

What to Expect During the Test

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause significant discomfort. The process takes a few minutes, and you can resume normal activities afterward.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Abnormal protein levels can signal underlying health issues, such as protein loss due to kidney or liver disease, inflammation, or genetic disorders. High or low levels may require further medical evaluation to determine the cause and guide treatment.
This test result may not provide a definitive diagnosis on its own. Your healthcare provider will consider the result alongside other symptoms, medical history, and tests to make an accurate assessment.
How long will I need to wait for my results?
Results are typically available within 1 to 3 business days, depending on your lab. Your provider will contact you directly with the outcome once it’s ready.
Can I eat or drink before this test?
Generally, no special diet is required unless specified by your provider. However, follow any instructions they give you 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