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Serum or plasma mass concentration of fibrinogen

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

This test measures the amount of fibrinogen, a protein in your blood that helps blood clot and supports blood vessel repair.

Quick summary

["Fibrinogen helps prevent excessive bleeding and aids in healing after injuries."]

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

Key facts at a glance

LOINC
27393-8
Short code
Deprecated S pneum23f IgG Ser-mCnc
Synonyms
Deprecated S pneum23f IgG Ser-mCnc
Category
coagulation
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 Is This Test Done?

Your healthcare provider may order this test to check for conditions affecting blood clotting, such as liver disease, kidney problems, or certain blood disorders. It can also help monitor treatment for bleeding disorders or clotting issues.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for 8–12 hours before the test if it involves drawing blood from a vein.

How the Test Is Performed

A healthcare professional will insert a needle into a vein in your arm to draw blood. You may feel a slight sting, but it usually lasts only a few seconds.

What the Results Mean

Results can vary based on health, age, and other factors. Low levels may indicate bleeding disorders or liver/kidney problems, while very high levels could suggest clotting disorders or inflammation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fibrinogen Level

Frequently asked questions

What causes abnormal fibrinogen levels?
Abnormal fibrinogen levels can result from liver disease, kidney problems, infections, inflammation, or certain medications. Rarely, genetic disorders or blood clotting disorders may also affect it.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time.
Can diet affect fibrinogen levels?
Dietary factors like high-fat or high-sugar foods may influence inflammation-related clotting proteins, but fibrinogen is primarily regulated by liver function and health conditions, not diet alone.
  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