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Fibrinogen test for cardiovascular health and blood clotting risk assessment

Blood Test for Heart Health and Clotting Risk

Fibrinogen Antigen

Google
3,138 reviews
  • Pinpoint inflammation levels affecting your health
  • Reveal blood clot risks effortlessly
  • Assess your cardiovascular health comprehensively
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're concerned about your risk of blood clots, heart disease, or have unexplained bleeding issues. It helps identify inflammation levels in your body and assesses your cardiovascular health by measuring fibrinogen, a protein that plays a key role in blood clotting. Many people use this test when they have a family history of heart disease, are experiencing unusual bruising or bleeding, or want to understand their cardiovascular risk factors.

How should I prepare for this test?

Fasting: 8 hours

You'll need to fast overnight before this test, which means no food or beverages except water for at least 8 hours before your blood draw. Your healthcare provider will also need your hematocrit value to perform this test, so you may need to have a Complete Blood Count (CBC) done if that information isn't already available. Follow any additional instructions provided by your testing facility.

What's included in this test?

Fibrinogen Antigen, Nephelometry

This test measures Fibrinogen Antigen using nephelometry, a precise laboratory method. Fibrinogen is a crucial protein that helps your blood clot properly and serves as a marker of inflammation in your body. This measurement provides important insights into both your bleeding risk and cardiovascular health, as elevated levels are associated with increased risk of heart disease and stroke.

What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining what your fibrinogen levels mean for your cardiovascular health and clotting risk. These notes include personalized recommendations like lifestyle modifications, dietary changes, or whether you should follow up with a cardiologist or hematologist. You'll also get the standard lab report and can track your fibrinogen levels over time using our trends feature to monitor how your heart health interventions are working.
Who should consider getting this test?
This test is important for people with a family history of heart disease or blood clotting disorders, those experiencing unexplained bleeding or bruising, and individuals with liver disease. It's also useful for anyone being evaluated for cardiovascular risk factors, people undergoing thrombolytic therapy who need monitoring, or those with chronic inflammatory conditions. Your doctor may also recommend this if you have symptoms suggesting a bleeding disorder or disseminated intravascular coagulation.
What symptoms indicate I may need this test?
Consider this test if you experience frequent nosebleeds, easy bruising, prolonged bleeding from cuts, or bleeding gums. Other signs include a family history of heart attacks or strokes at young ages, chronic inflammation, or if you're being evaluated for unexplained fatigue or joint pain that could be related to inflammatory conditions. This test can also help if your doctor suspects clotting problems or liver disease.
How can I naturally support healthy fibrinogen levels?
Maintaining healthy fibrinogen levels starts with regular cardiovascular exercise like walking, swimming, or cycling for at least 30 minutes most days of the week. Eating an anti-inflammatory diet rich in omega-3 fatty acids from fish, nuts, colorful vegetables, and fruits can help. Avoiding smoking, managing stress through relaxation techniques, maintaining a healthy weight, and getting adequate sleep also support balanced fibrinogen and overall cardiovascular health.
What is fibrinogen and why does it matter?
Fibrinogen is a protein made by your liver that's essential for blood clotting and wound healing. When you get a cut, fibrinogen converts into fibrin strands that form a mesh to stop bleeding. Beyond clotting, fibrinogen levels rise during inflammation and infections as part of your body's acute phase response. High levels can indicate increased cardiovascular risk, while very low levels may lead to bleeding problems or suggest liver disease or other serious conditions.
What does high fibrinogen mean?
High fibrinogen levels often indicate inflammation somewhere in your body, whether from infection, chronic inflammatory conditions, or tissue damage. Elevated fibrinogen is also associated with increased risk of heart disease, stroke, and blood clots because it makes your blood thicker and more likely to clot. High levels can occur with smoking, obesity, diabetes, stress, or as part of acute illness or injury.
What does low fibrinogen mean?
Low fibrinogen levels can lead to bleeding problems because your blood cannot clot properly. This is most commonly caused by liver disease, since the liver produces fibrinogen, or by disseminated intravascular coagulation (DIC), a serious condition where clotting factors get used up throughout the body. Rare inherited conditions can also cause low fibrinogen. Symptoms may include easy bruising, frequent nosebleeds, or prolonged bleeding from minor cuts.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Fibrinogen Antigen 475 mg/dL
Demo results
Low Optimal 200 - 400 High
475 mg/dL

What this means

Your fibrinogen levels are elevated above the optimal range, which may indicate inflammation in your body or increased cardiovascular risk. While mildly elevated levels are common with stress, infection, or lifestyle factors, consistently high fibrinogen can contribute to thicker blood and higher risk of blood clots over time.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Blood Test for Heart Health and Clotting Risk

Google
3,138 reviews
  • Pinpoint inflammation levels affecting your health
  • Reveal blood clot risks effortlessly
  • Assess your cardiovascular health comprehensively

1,000,000+ blood tests later, here's what our customers say

Google reviews 3138 reviews Next
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.