Fibrinogen
Fibrinogen is a protein made by the liver that is essential for blood clot formation. It is converted to fibrin during the clotting process.
Category: Coagulation
Also known as: fibrinogen, factor i, fibrinogen activity
Reference range: 200–400 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High fibrinogen levels may indicate acute inflammation, infection, tissue damage, cardiovascular disease risk, pregnancy, or certain cancers.
Low values may indicate
Low fibrinogen levels may indicate liver disease, disseminated intravascular coagulation (DIC), inherited fibrinogen deficiency, or excessive fibrinolysis.
Frequently asked questions
- What is a normal Fibrinogen level?
- A typical reference range for Fibrinogen is 200–400 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Fibrinogen measured in?
- Fibrinogen is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Fibrinogen reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Fibrinogen over time?
- Yes. Upload results from any lab and BloodId charts your Fibrinogen over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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