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Fibrinogen (Serum or Plasma Concentration)

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

This test measures the level 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
73024-2
Short code
Fenofibrate (neut) IgG SerPl Ql FC
Synonyms
Fenofibrate (neut) IgG SerPl Ql FC
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
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 Is Done

Doctors may order a fibrinogen test to check for bleeding disorders, clotting problems, or conditions like liver disease, which can affect how well your blood clots. It might also be used to monitor treatment for conditions like disseminated intravascular coagulation (DIC) or to evaluate response to medications that thin the blood.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on blood-thinning medications, let your healthcare provider know before the test.

What the Results Mean

Results are reported as a concentration in grams per deciliter (g/dL). Lower levels may indicate bleeding risks or liver issues, while very high levels could suggest inflammation or clotting disorders.

Common Conditions Monitored

Fibrinogen levels are often checked in people with suspected clotting disorders, liver disease, or those taking anticoagulants like warfarin.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Fibrinogen is essential for blood clotting. Low levels can lead to excessive bleeding, while high levels may signal inflammation or clotting risks. Monitoring it helps guide treatment for conditions like liver disease, infections, or clotting disorders.

Short name

Fibrinogen

Frequently asked questions

What causes low fibrinogen levels?
Low fibrinogen can result from liver disease, severe infections, blood loss, or certain medications. It may also occur in conditions like disseminated intravascular coagulation (DIC), where the body forms clots uncontrollably.
What are the symptoms of abnormal fibrinogen levels?
Symptoms of low fibrinogen include excessive bleeding (e.g., easy bruising, nosebleeds, or heavy menstrual periods). High fibrinogen levels may cause no symptoms but can be linked to inflammation or clotting risks.
Can fibrinogen levels change with diet?
Dietary factors like vitamin K intake (found in leafy greens) can influence clotting proteins, but fibrinogen itself isn’t directly affected by diet. However, liver health—which depends on nutrition—may indirectly impact 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