Skip to content

Fibrinogen (Serum) Concentration

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

This test measures the amount of fibrinogen, a protein in your blood that plays a key role in blood clotting.

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
110820-8
Short code
FLUBV IgM Msmt Ser
Synonyms
FLUBV IgM Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 doctor may recommend this test if you have symptoms of bleeding disorders, such as easy bruising or excessive bleeding, or if you’re at risk for blood clots. It may also be checked before surgery to ensure proper clotting function or to monitor conditions like liver disease that can affect fibrinogen levels.

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, let your doctor know before the test.

What the Results Mean

Fibrinogen levels can vary based on health, diet, and medications. While reference ranges differ by lab, low levels may suggest bleeding disorders or liver issues, while very high levels could indicate inflammation or pregnancy.

Common Conditions Monitored

Fibrinogen is often checked in people with suspected clotting disorders, liver disease, or after trauma/injury. It’s also used to guide decisions about blood transfusions or anticoagulant therapy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Fibrinogen’s Role in Health

Short name

Serum Fibrinogen

Frequently asked questions

What causes low fibrinogen levels?
Low fibrinogen can result from liver disease (where protein production is impaired), severe infections, blood loss, or certain medications. It may also be inherited in rare bleeding disorders like afibrinogenemia.
How does high fibrinogen relate to health?
Elevated fibrinogen is often a marker of inflammation or infection. It may also be present in pregnancy or during acute stress, though it’s not always a cause for concern unless symptoms like fever or swelling accompany it.
Can diet affect fibrinogen levels?
Yes, diet may influence fibrinogen indirectly. High-sodium diets or excessive alcohol can sometimes raise fibrinogen, while a balanced diet rich in fruits, vegetables, and lean proteins may support normal protein levels.
  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