What's this test for?

This test is ideal if you're experiencing unexplained blood clots, repeated miscarriages, or have been told you might have an autoimmune condition like lupus. It looks for a specific antibody that can cause your immune system to mistakenly attack proteins in your blood, raising your risk of clotting problems. It's often used alongside other tests when a doctor-ordered workup for autoimmune or clotting disorders is already suspected based on your history.

What's included in this test?

This test measures a single antibody category that reflects how your immune system may be reacting to proteins involved in blood clotting. Understanding this one marker helps clarify whether an autoimmune clotting risk factor might be part of what's going on with your health.

What happens after I get my results?

Your results will appear in your online account with a clear explanation of what's considered a normal range for this antibody. If your result is positive, a common next step is retesting in about 12 weeks to see if the antibody is still present, since a single positive result isn't always meaningful on its own. You can download a standard lab report directly from your account at any time, and if you retest in the future, the trends feature lets you track changes side by side. If your result is negative but your symptoms continue, additional related antibody tests may be worth considering.

How can I naturally support healthy blood clotting balance?

While antibody levels themselves aren't changed by lifestyle, you can support overall clotting and circulation health by staying well hydrated, moving regularly to keep blood flowing, and avoiding smoking, which increases clotting risk. Eating an anti-inflammatory diet rich in omega-3s, vegetables, and whole grains may help support overall immune balance. Managing stress and getting consistent sleep also supports a more balanced immune system over time.

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 as soon as they're posted to your secure online account, where you can view and download the full report.

Who should consider this test?

This test is a good option for people who have had unexplained blood clots, multiple pregnancy losses, or a diagnosis of an autoimmune condition like lupus. It's also useful if a previous antibody panel came back negative but symptoms suggestive of an autoimmune clotting disorder are still present. People with a family history of autoimmune or clotting disorders may also want to consider testing.

What symptoms indicate I may need this test?

Common signs include unexplained blood clots in the legs or lungs, repeated miscarriages (especially after 10 weeks), unexplained strokes at a young age, or a skin rash with a lace-like pattern. Joint pain, fatigue, and other symptoms common in autoimmune conditions like lupus can also be a reason to test. If you've had any of these along with a family history of autoimmune disease, this test may provide useful information.

What does a positive antibody result mean?

A positive result means your immune system is producing antibodies that target a protein involved in blood clotting, which can raise your risk of forming clots. On its own, one positive result doesn't confirm a diagnosis — testing is usually repeated after about 12 weeks to see if the antibody persists. If it stays positive over time along with a history of clotting or pregnancy loss, it may point toward antiphospholipid syndrome.

What causes a positive result on this test?

A positive result usually reflects an autoimmune process, where the immune system mistakenly identifies normal proteins in the blood as a threat and produces antibodies against them. This can happen on its own or alongside conditions like lupus. In some cases, infections or certain medications can also trigger temporary antibody production.

How often should I retest?

If your first result is positive, retesting at around 12 weeks is recommended to confirm whether the antibody is persistently present, which matters for diagnosis. If your result is negative but you still have symptoms, discussing further testing timing based on your specific situation makes sense. Once a pattern is established, retesting frequency typically depends on your individual health picture and any treatment being used.

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.

Prothrombin Antibody (IgG) Test - Clotting Risk Check

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]

Prothrombin Antibody Test for Clotting & Autoimmune Symptoms