A clotting protein that also functions as an acute-phase inflammation marker.
What is it
Fibrinogen is a protein produced by the liver that is essential to blood clotting. It also rises during systemic inflammation as an acute-phase reactant.
Why it's measured
Elevated fibrinogen has been associated with cardiovascular risk and inflammatory states in published research.
Reference range
Standard laboratory reference
200 – 400 mg/dL
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with inflammation and elevated cardiovascular risk in research literature.
Lower
Has been associated with bleeding tendencies and certain liver conditions in research literature.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Used in cardiovascular risk evaluation and clotting workups.
Related markers
Common questions
Fibrinogen is a protein produced by the liver that is essential to blood clotting. It also rises during systemic inflammation as an acute-phase reactant.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. Fibrinogen is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
Fibrinogen is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.