Fibrinogen
Fibrinogen is a liver-produced clotting factor and acute phase reactant that forms the fibrin mesh of blood clots. Elevated levels increase blood viscosity and thrombotic risk and are associated with cardiovascular events and chronic inflammation. Very low values can indicate liver failure, disseminated intravascular coagulation, or inherited fibrinogen disorders and raise bleeding risk.
3 providers include this
Inflammation &Immune Markers
200-400 mg/dL
What is Fibrinogen?
Fibrinogen is a liver-produced clotting factor and acute phase reactant that forms the fibrin mesh of blood clots. Elevated levels increase blood viscosity and thrombotic risk and are associated with cardiovascular events and chronic inflammation. Very low values can indicate liver failure, disseminated intravascular coagulation, or inherited fibrinogen disorders and raise bleeding risk.
Why It Matters
Essential for blood clot formation. Elevated levels increase blood viscosity and cardiovascular risk. Also an acute phase reactant elevated in chronic inflammation.
Which Providers Test Fibrinogen?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | — | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | — | $349 | 65 |
 Labcorp OnDemand | — | $398 | 40+ |
| — | $486 | 40+ | |
| — | $449 | 288 | |
| — | $349 | 100+ | |
| — | $829 | 54 | |
 Function Health | ✓ | $365 | 160+ |
| — | $250 | 65 | |
| — | $495 | 80+ | |
| — | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| — | $375 | 95+ | |
| — | $Varies | 75+ | |
| — | $190 | 100+ | |
| — | $99 | 50 | |
| — | $124 | 60 | |
| — | $349 | 130+ | |
| — | $349 | 80+ | |
| — | $375 | 85 | |
| ✓ | $700 | 128 | |
| — | $99 | 100+ |
Frequently Asked Questions
What is Fibrinogen?
Fibrinogen is a liver-produced clotting factor and acute phase reactant that forms the fibrin mesh of blood clots. Elevated levels increase blood viscosity and thrombotic risk and are associated with cardiovascular events and chronic inflammation. Very low values can indicate liver failure, disseminated intravascular coagulation, or inherited fibrinogen disorders and raise bleeding risk.
What is the optimal range for Fibrinogen?
The standard reference range for Fibrinogen is 200-400 mg/dL. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Fibrinogen?
3 out of 22 blood testing providers include Fibrinogen in their panels. This biomarker has limited availability.
What category does Fibrinogen fall under?
Fibrinogen is categorized under Inflammation &Immune Markers. This category includes biomarkers that help assess related aspects of health and wellness.
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Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12