Fibrinogen, calculated from whole blood
This test measures the amount of fibrinogen, a protein in your blood that plays a key role in blood clotting. It is calculated from your whole blood sample.
["Fibrinogen helps prevent excessive bleeding and supports proper blood clotting."]
Key facts at a glance
- LOINC
- 97016-0
- Short code
- Fibrinogen Bld Calc-mCnc
- Synonyms
- Fibrinogen Bld Calc-mCnc
- Category
- coagulation
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- 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
- calculated
- CPT
- 85384
- SNOMED
- 47279000
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Doctors may order this test to evaluate your risk of bleeding or clotting, especially if you have conditions like liver disease, blood disorders, or are taking medications that affect clotting. It can also help monitor treatment for conditions like disseminated intravascular coagulation (DIC).
What Does a Low or High Level Mean?
Low levels of fibrinogen may indicate conditions that increase bleeding risk, such as liver disease or certain blood disorders. High levels might suggest inflammation, infection, or other clotting-related issues. Your doctor will interpret results in the context of your overall health.
How Is This Test Performed?
A blood sample is drawn from a vein, usually in your arm. The sample is processed to calculate fibrinogen levels based on standard laboratory methods.
What Are Common Causes of Abnormal Results?
Fibrinogen levels can be affected by medical conditions (e.g., liver disease, infections), medications (e.g., anticoagulants), or certain genetic factors. Your doctor will review your medical history and other test results to understand potential causes.
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.
◆Associated findings1
Short name
Fibrinogen (Calc)
Frequently asked questions
What does a fibrinogen test measure?
How often should I get this test?
Can lifestyle changes affect fibrinogen levels?
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