Skip to content

Fibrinogen (Serum) Concentration

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

This test measures the amount of fibrinogen, a blood protein essential for clot formation, in your serum sample.

Quick summary

["Fibrinogen helps your blood clot properly and supports wound healing."]

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

Key facts at a glance

LOINC
74787-3
Short code
FLUBV Vic + Yam RNA Pnl Spec
Synonyms
FLUBV Vic + Yam RNA Pnl Spec
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 Is This Test Done?

Your healthcare provider may order this test to evaluate bleeding disorders, assess liver function (since the liver produces fibrinogen), or monitor conditions like disseminated intravascular coagulation (DIC) or certain cancers. It can also help diagnose or monitor clotting disorders or bleeding risks.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re on blood-thinning medication, discuss it with your provider beforehand.

What the Results Mean

Results are compared to a general reference range, but exact values can vary by lab. Low levels may suggest bleeding disorders or liver issues, while high levels could indicate inflammation or dehydration.

Common Conditions Monitored

Fibrinogen levels are tracked in conditions like liver disease, clotting disorders (e.g., hemophilia), or during treatments for cancer or infections.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Fibrinogen

Frequently asked questions

What does a low fibrinogen level mean?
A low fibrinogen level may signal bleeding problems, liver disease, or conditions like DIC, where clotting and bleeding occur simultaneously. Your provider will review your symptoms and other test results to determine the cause.
How is fibrinogen tested?
This test involves drawing blood from a vein in your arm. The blood is processed to separate serum (the liquid part without clotting factors), and the fibrinogen level is measured using a specialized lab method.
Can diet affect fibrinogen levels?
Dietary factors like high protein intake or certain medications (e.g., blood thinners) may influence fibrinogen, but the test measures the current level in your blood. Avoiding heavy meals 12 hours before testing helps 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