What's this test for?

This test is ideal if you've experienced unexplained blood clots, have a family history of clotting disorders, or are planning surgery or pregnancy. It measures how well your body's natural anticoagulant system is working to prevent harmful clots from forming in your veins and arteries. Many people use this test when they've had deep vein thrombosis, pulmonary embolism, or repeated miscarriages that might be linked to clotting issues.

What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your Protein C activity levels mean for your clotting risk and overall circulatory health. These notes include personalized recommendations like lifestyle modifications, dietary considerations, or whether you should consult a hematologist about anticoagulation therapy. You'll also get the standard lab report and can track your Protein C levels over time using our trends feature, which is especially helpful if you're monitoring a known deficiency or managing treatment.

What's included in this test?

This test measures Protein C Activity. This test measures Protein C Activity, which evaluates how effectively your blood's natural anticoagulant system is functioning. Protein C is essential for regulating clot formation and preventing excessive clotting that can lead to dangerous conditions like deep vein thrombosis or stroke. Understanding your Protein C activity helps identify inherited or acquired clotting disorders and guides decisions about pregnancy planning, surgery preparation, or long-term anticoagulation therapy.

How should I prepare for this test?

You should inform your doctor about any blood thinners or anticoagulant medications you're taking, as these can affect test results. If you're on warfarin, your doctor may have you stop it temporarily before testing. Avoid taking this test during an acute clotting episode or within two weeks of one, as results may not be accurate. No fasting is typically required, but follow any specific instructions provided by your healthcare provider.

Who should consider getting this test?

This test is important for anyone who has experienced unexplained blood clots, especially at a young age or in unusual locations. It's also recommended for people with a family history of clotting disorders, women who have had recurrent miscarriages, and individuals preparing for major surgery or long periods of immobility. If you've had deep vein thrombosis, pulmonary embolism, or stroke without clear cause, this test can help identify an underlying clotting disorder.

What symptoms indicate I may need this test?

You may need this test if you've experienced leg swelling, pain, or warmth that could indicate a blood clot, or sudden chest pain and shortness of breath suggesting a pulmonary embolism. Other signs include unexplained strokes or mini-strokes, especially in younger people, and recurrent pregnancy losses. If you have family members with blood clotting disorders or early-onset clots, screening is also recommended even without symptoms.

What is Protein C deficiency and why does it matter?

Protein C deficiency is a condition where your body doesn't produce enough of this natural blood thinner, making you more prone to developing dangerous blood clots. It can be inherited from your parents or acquired through certain medical conditions, liver disease, or vitamin K deficiency. This matters because people with Protein C deficiency have a significantly higher risk of deep vein thrombosis, pulmonary embolism, and pregnancy complications that require careful medical management.

What does low Protein C activity mean?

Low Protein C activity means your blood's natural clot-prevention system isn't working as effectively as it should, putting you at higher risk for abnormal blood clots. This can be due to an inherited genetic condition, liver disease, vitamin K deficiency, or use of certain medications like warfarin. Your doctor may recommend anticoagulation therapy, closer monitoring during high-risk situations like surgery or pregnancy, and genetic counseling if it's hereditary.

How can I support healthy blood clotting naturally?

While Protein C deficiency often requires medical management, you can support overall circulatory health by staying well-hydrated and moving regularly to prevent blood from pooling. Ensure adequate vitamin K intake through leafy greens, which supports natural anticoagulant proteins, but be consistent if you're on blood thinners. Avoid smoking, maintain a healthy weight, and wear compression stockings during long periods of sitting, like flights. Always discuss any supplements with your doctor, as some can interact with clotting disorders or medications.

How often should I retest my Protein C levels?

If you're initially diagnosed with Protein C deficiency, your doctor will likely want to confirm results with a repeat test after any acute illness has resolved. Once diagnosed, you typically don't need frequent retesting unless your clinical situation changes, like adjusting anticoagulation therapy or planning pregnancy. If you're on warfarin or similar medications, you'll need regular monitoring of other clotting factors, but not necessarily Protein C itself. Your hematologist will provide personalized guidance based on your specific situation.

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.

Blood Clot Risk Test - Protein C Activity 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]

Blood Test for Clotting Risk and Blood Clot Prevention

Protein C Activity

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

How should I prepare for this test?

What's included in this test?

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

Blood Test for Clotting Risk and Blood Clot Prevention

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

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