What's this test for?

This test is ideal if you're experiencing unusual bruising, prolonged bleeding, or have a personal or family history of a bleeding disorder like hemophilia A. It's also useful if you're being monitored while on certain blood-thinning medications or Factor VIII replacement therapy, since it measures how well this specific clotting factor is working. This chromogenic method is often preferred when other conditions, like Lupus anticoagulant, could interfere with standard clotting tests.

What happens after I get my results?

Your results will show up in your account with the normal range clearly explained next to your value, so you can see exactly where you fall. If your level is outside the expected range, the report will help you understand what that means, and you can use the trends feature to track your Factor VIII activity over time if you retest in the future. A downloadable lab report is always available in your account for your records. If your result points to a significant bleeding or clotting risk, treat that as a sign to seek medical care promptly.

Who should consider this test?

People with a personal or family history of hemophilia A, unexplained bruising, or prolonged bleeding after cuts, dental work, or surgery are good candidates. It's also relevant if you're currently on heparin, direct thrombin inhibitors, or Factor VIII concentrates and need an accurate read on your clotting activity despite those medications. Anyone previously diagnosed with Lupus anticoagulant, where standard clotting tests can give misleading results, may be directed toward this more specific chromogenic version.

What symptoms indicate I may need this test?

Watch for signs like frequent or large bruises, nosebleeds that are hard to stop, heavy or prolonged bleeding from small cuts, or excessive bleeding after dental work or surgery. Joint pain or swelling without a clear injury can also be a sign of a clotting factor issue. If you have a known bleeding disorder in your family, even mild symptoms are worth checking out with this test.

When will I get my results?

Results are typically ready within about 7 days of your sample being processed. You'll receive a notification once your report is available, and you can log into your account anytime to view it. If your situation feels urgent, such as active or uncontrolled bleeding, don't wait for results and seek medical care right away.

How can I naturally support healthy blood clotting?

Staying well hydrated and eating a balanced diet with enough vitamin K, found in leafy greens, can support your body's natural clotting process. Avoiding excessive alcohol and not smoking also helps keep your blood vessels and clotting function working properly. That said, Factor VIII levels are largely determined by genetics or underlying health conditions, so lifestyle changes alone won't fix a significant deficiency or excess.

What does high Factor VIII activity mean?

A higher than normal Factor VIII level can mean your blood is more prone to forming clots, which has been linked to an increased risk of blood clots in the veins. This can happen with inflammation, certain infections, liver conditions, or simply as your body's response to stress or illness. If your result is elevated, it's a good idea to mention any symptoms like leg swelling or unexplained shortness of breath and seek prompt medical care.

What does low Factor VIII activity mean?

A lower than normal Factor VIII level means your blood may take longer to clot properly, which can lead to easy bruising or prolonged bleeding. This is the hallmark finding in hemophilia A, but it can also show up temporarily with certain medications or conditions. If your level is low, especially if you have bleeding symptoms, this is a sign to seek medical care to figure out the cause and next steps.

What causes abnormal Factor VIII levels?

Low levels are most often caused by an inherited condition like hemophilia A, though liver disease or certain autoimmune conditions can also lower this factor. High levels are more commonly tied to inflammation, infection, pregnancy, or being on estrogen-containing medications. Blood thinners like heparin or direct thrombin inhibitors can also affect how this test reads, which is part of why the chromogenic method is preferred in those cases.

How often should I retest?

If you have a known bleeding disorder or are on treatment that affects clotting factors, retesting every few months or as advised after any dosage change can help you track how your levels are trending. If this is a one-time check without ongoing symptoms or treatment changes, you may not need to retest unless new symptoms come up. Use the trends feature in your account to keep an eye on any changes over time.

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.

Factor VIII Activity Test - Bleeding Disorder Screening

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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