What's this test for?

This test is ideal if you're experiencing unexplained bruising, prolonged bleeding, or if a previous blood clotting test came back abnormal. It's often used to figure out why blood isn't clotting the way it should, especially when there's a question about whether a blood thinner like heparin is affecting the results. This test helps clarify whether the issue is related to how your body makes or uses fibrinogen, a protein that's essential for clotting.

What happens after I get my results?

Your results will show up in your account along with an explanation of what a normal clotting time range looks like so you can see exactly where your value falls. If your result is prolonged, next steps usually involve additional clotting studies or a conversation about any medications you're taking that could affect clotting, since this isn't something lifestyle changes alone typically fix. You can download a standard lab report straight from your account at any time, and if you retest in the future, the trends feature lets you track changes in your clotting time over time. If a result comes back significantly abnormal, especially with active bleeding or bruising, seek medical care right away.

Who should consider this test?

People with a history of unexplained bleeding or bruising, a family history of clotting disorders, or those who've had a prior abnormal thrombin time test are good candidates. It's also useful for people on heparin therapy whose doctors need to rule out heparin contamination as the cause of prolonged clotting results. If you have liver disease or a condition like disseminated intravascular coagulation, this test can help evaluate how it's affecting your fibrinogen function.

What symptoms indicate I may need this test?

Watch for symptoms like easy bruising, nosebleeds that won't stop, heavy or prolonged bleeding from small cuts, or bleeding gums. Blood in urine or stool, unusually heavy menstrual periods, and excessive bleeding after surgery or dental work are also signs worth checking out. If you have a known clotting disorder in your family, even mild symptoms may be worth investigating with this test.

When will I get my results?

Results are typically ready within about 7 days of your sample being processed at the lab. You'll get a notification once your results are posted to your account, where you can view the detailed report and see how your value compares to the normal range.

What is fibrinogen and why does it matter?

Fibrinogen is a protein made by your liver that plays a key role in helping blood clot properly when you get injured. If your fibrinogen isn't working correctly or there isn't enough of it, you may bleed more easily or for longer than normal. This test helps determine if your fibrinogen is functioning the way it should by measuring how quickly a sample of your blood clots when exposed to reptilase, a substance derived from snake venom.

What does a prolonged reptilase time mean?

A prolonged reptilase time usually points to a problem with fibrinogen itself, either you don't have enough of it or the fibrinogen you have isn't working properly. This can happen from an inherited condition you were born with, or it can develop later due to things like liver disease or a serious clotting disorder called disseminated intravascular coagulation. Because reptilase time isn't affected by blood thinners like heparin, a prolonged result here (while thrombin time is also prolonged) points away from medication as the cause.

What causes abnormal fibrinogen results?

Inherited conditions like dysfibrinogenemia, hypofibrinogenemia, or afibrinogenemia can cause your fibrinogen to be low or dysfunctional from birth. Later in life, liver disease, disseminated intravascular coagulation, and certain acquired conditions can also lower fibrinogen levels or affect how well it works. Newborns can naturally have a slightly longer reptilase time, so this is taken into account when interpreting infant results.

How often should I retest?

If your first result was normal and you have no ongoing symptoms, you generally won't need to retest unless new bleeding or bruising symptoms show up. If you're being monitored for a known fibrinogen disorder or liver condition, retesting every few months (or as advised based on your specific situation) can help track whether things are stable or changing. Use the trends feature in your account to keep an eye on how your results shift over time.

What should I do if my results are abnormal?

If your reptilase time is prolonged, review the explanation provided with your report to understand whether it points toward a fibrinogen issue or another cause. Simple next steps include repeating the test to confirm the result and checking in on any new medications, supplements, or liver-related symptoms that could be contributing factors. If you notice active or worsening bleeding symptoms, seek medical care promptly rather than waiting for a retest.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. 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. 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. 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. 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. 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. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com 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 support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

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 support@privatemdlabs.com. 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 support@privatemdlabs.com.

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 support@privatemdlabs.com. 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 support@privatemdlabs.com and we'll gladly help you.

Reptilase Clotting Time - Fibrinogen & Bleeding Test

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
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.
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.
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.
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.
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.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

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