What's this test for?

This test is ideal if you're starting warfarin (Coumadin) therapy or having trouble finding the right dose. It looks at your genes to see how your body processes this blood thinner, which can help explain why some people bleed too easily or don't get enough clot protection at standard doses. It's especially useful if you or your family have a history of unusual reactions to blood thinners.

What happens after I get my results?

Your results will show up in your account along with an explanation of what each genetic variant means for warfarin processing. Because this is a one-time genetic test, there's usually no need to retest it later, but the report can guide conversations about dosing adjustments going forward. You can download the standard lab report anytime from your account, and it stays saved in your history for future reference alongside any other tests you track over time.

What's included in this test?

This test analyzes the VKORC1 gene (promoter variant -1639 G→A) and CYP2C9 gene variants. VKORC1 variants account for roughly 25%-44% of the variability in warfarin dose needs, while CYP2C9 variants account for another 10%-15%. Together, these two genes explain much of why people need very different warfarin doses to get the same clot-prevention effect, supporting more personalized, safer dosing.

How can I naturally support healthy blood clotting while on warfarin?

Keeping your vitamin K intake consistent day to day (rather than avoiding leafy greens altogether) helps keep warfarin's effect steady. Staying well hydrated, limiting alcohol, and avoiding sudden big changes in diet or supplements can also help keep your levels predictable. Regular gentle movement supports circulation, but always avoid activities with high fall or injury risk while your blood is thinner than normal.

When will I get my results?

Results are typically ready within about 7 days of your sample being processed at the lab. Genetic tests like this one take a bit longer than routine bloodwork because of the specialized analysis involved. You'll get a notification as soon as your results are posted to your account.

Who should consider this test?

This test is a good fit for anyone newly prescribed warfarin, anyone who has had unpredictable results on warfarin in the past, or people with a family history of bleeding or clotting complications on blood thinners. It's also useful if you've experienced side effects at standard doses and want more insight into why.

What symptoms indicate I may need this test?

Signs like unusual bruising, prolonged bleeding from small cuts, nosebleeds, or blood in urine or stool while on warfarin can indicate your dose isn't matched to your genetic makeup. On the flip side, forming clots despite being on warfarin can also signal a dosing mismatch. If you notice any of these, especially bleeding that won't stop, seek medical care right away.

What is the VKORC1 gene and why does it matter?

VKORC1 makes a protein that warfarin targets to slow down blood clotting. Certain variations in this gene make people much more sensitive to warfarin, meaning they need a lower dose to get the same effect, while others need more. Knowing your VKORC1 pattern helps explain a large part of the dose variability seen between different people.

What does it mean if I have a warfarin-sensitive CYP2C9 variant?

CYP2C9 is an enzyme that breaks down warfarin in your liver. If you carry a variant that makes this enzyme slower, warfarin builds up more in your body, raising your risk of bleeding at standard doses. This information can be used to consider a lower starting dose and closer monitoring.

How often should I retest this?

Since VKORC1 and CYP2C9 are genes you're born with, they don't change over time, so this test only needs to be done once in your lifetime. You won't need to repeat it even if you start or stop warfarin again in the future. Keep the report on file to reference whenever warfarin therapy comes up.

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.

Warfarin Sensitivity Test - Personalized Dosing Insight

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

[email protected]

AccuType Warfarin Sensitivity Genetic Test

AccuType® Warfarin

Prescription & fees included

Easy to understand results

Fast & convenient

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

What's included in this test?

What happens after I get my results?

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

Find a lab near you

AccuType Warfarin Sensitivity Genetic Test

Prescription & fees included

Easy to understand results

Fast & convenient

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