Skip to content

Serum or plasma concentration of a specific protein marker measured by immunoassay (e.g., for renal or liver function assessment)

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

This test measures a protein in your blood that may help assess how well your kidneys or liver are working.

Quick summary

["This test helps doctors check organ function by detecting abnormal protein levels."]

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

Key facts at a glance

LOINC
6115-0
Short code
False ragweed IgE Qn
Synonyms
False ragweed IgE Qn
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 you have symptoms like swelling, fatigue, or changes in urine output, or if you have conditions like kidney disease, liver disease, or certain infections.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves a blood draw. Drink plenty of water the day before if it’s a urine-based test.

What the Test Involves

A healthcare professional will collect a blood sample (serum or plasma) or urine sample. The sample is then tested in a lab using an immunoassay method to measure the protein concentration.

What the Results Mean

Results may indicate if your kidneys or liver are functioning normally or if there’s an issue like protein loss, inflammation, or organ damage. Your provider will discuss findings with you based on your symptoms and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test is critical for diagnosing or monitoring conditions affecting protein metabolism, such as nephrotic syndrome (kidney disease causing protein loss), liver cirrhosis, or certain infections. Elevated or low levels may signal underlying health risks requiring further evaluation.

Short name

Protein marker test

Frequently asked questions

What causes abnormal protein levels in this test?
Abnormal results can occur due to kidney or liver disease, infections, inflammation, or genetic conditions. Other factors like diet, medications, or dehydration may also influence protein levels.
How often should I get this test?
Frequency depends on your health status. Your doctor will determine how often to repeat the test based on your symptoms, medical history, and treatment plan.
Can I eat or drink before this test?
For blood-based tests, fasting may be required. For urine tests, follow your provider’s instructions—usually no restrictions, but drink as directed to ensure proper sample volume.
  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