Fibrinogen concentration (serum/plasma mass concentration)
This test measures the amount of fibrinogen, a protein in your blood that helps with clotting.
["Fibrinogen helps your blood clot properly and supports overall blood health."]
Key facts at a glance
- LOINC
- 74615-6
- Short code
- VLCFA C22:0 Fib-mCnt
- Synonyms
- VLCFA C22:0 Fib-mCnt
- 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
What Is Fibrinogen?
Fibrinogen is a key protein in your blood that plays a vital role in preventing excessive bleeding and promoting proper clotting. It’s produced by your liver and helps form clots when needed. Low or high levels can affect how your blood clots and may signal underlying health concerns.
Why Might You Need This Test?
Your doctor may order a fibrinogen test to check for bleeding disorders, clotting problems, or conditions like liver disease, kidney disease, or certain cancers. It can also help monitor treatments for conditions like disseminated intravascular coagulation (DIC) or after surgeries or injuries.
How Is the Test Done?
A small blood sample is taken from a vein, usually in your arm. The blood is then sent to a lab to measure fibrinogen levels. The test is quick and typically done as part of a routine blood draw.
What Does the Result Mean?
Results are usually reported as a numerical value (mass concentration) but aren’t always compared to a standard range unless specified by your doctor. Low fibrinogen may indicate bleeding risks or liver/kidney issues, while very high levels could signal clotting disorders or inflammation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Fibrinogen
Frequently asked questions
What causes abnormal fibrinogen levels?
How often should I get this test?
Can lifestyle changes affect fibrinogen?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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