Fibrinogen (Mass Concentration) in Serum or Plasma
This test measures the amount of fibrinogen, a protein in your blood that helps form blood clots.
["Fibrinogen supports healthy blood clotting and can indicate bleeding or clotting risks."]
Key facts at a glance
- LOINC
- 3255-7
- Short code
- Fibrinogen PPP-mCnc
- Synonyms
- Fibrinogen PPP-mCnc
- Category
- coagulation
- Sample
- plasma
- Container
- Lavender-top (EDTA) or Green-top (Heparin)
- Units
- N/A
- Ref low
- 200
- Ref high
- 400
- Critical range
- 60 N/A – —
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- coag
- CPT
- 85384
- SNOMED
- 47279000
- 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 doctor may order this test to check for conditions affecting blood clotting, such as bleeding disorders, liver disease, or to monitor treatment for conditions like disseminated intravascular coagulation (DIC). It can also help diagnose or evaluate certain cancers or infections.
What Does a Low or High Level Mean?
Low fibrinogen levels may suggest bleeding disorders, liver problems, or severe infections. High levels could indicate conditions like multiple myeloma, pregnancy, or certain inflammatory diseases.
How Is the Test Performed?
A blood sample is taken from a vein, usually in your arm. The blood is then processed to separate serum or plasma for testing.
What Are Common Causes of Abnormal Results?
Changes in fibrinogen can result from medical conditions (e.g., liver disease, cancer), medications (e.g., anticoagulants), or certain genetic factors. Lifestyle factors like diet or stress may also play a role.
Reference range
Adult: 200-400 mg/dLN/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Fibrinogen plays a critical role in blood clotting and is produced primarily in the liver. Abnormal levels can signal underlying health issues that require medical attention, such as bleeding risks or clotting disorders. Regular monitoring may be needed for patients with chronic conditions affecting fibrinogen production or function.
Short name
Fibrinogen Level
Frequently asked questions
What does a normal range of fibrinogen mean for me?
Can diet or supplements affect fibrinogen levels?
How often should I get this test?
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 17, 2026. · Read our editorial policy