What's this test for?

This test is ideal if you're experiencing unexplained low platelet counts, also known as thrombocytopenia, and need to figure out the cause. It measures thrombopoietin (TPO), a hormone that controls how many platelets your body makes. This helps separate cases of ITP (a common cause of low platelets) from rarer genetic conditions that raise TPO levels much higher.

What's included in this test?

This test measures your serum thrombopoietin level, a single blood marker rather than a panel. TPO is the hormone that tells your bone marrow how many platelets to produce, so checking it gives insight into why your platelet count might be low and whether your body is responding normally to that signal.

What happens after I get my results?

Your TPO results will show up in your account along with the normal range so you can see exactly where your number falls. If your level is only slightly elevated or normal, this points toward ITP as the likely cause; if it's markedly elevated, further follow-up on genetic causes may be worthwhile. You can download a standard lab report directly from your account, and if you retest later, the trends feature lets you track how your TPO level changes over time. If your platelet count is dangerously low or you have unusual bruising or bleeding, seek medical care right away.

How can I naturally support healthy platelet levels?

Eating iron-rich foods like leafy greens, beans, and lean meats can support healthy blood cell production. Staying hydrated and getting enough vitamin B12 and folate also helps your bone marrow work properly. Avoid alcohol and NSAID pain relievers like ibuprofen, since they can interfere with platelet function, and try to reduce activities that risk bruising or cuts until your levels are checked again.

When will I get my results?

Results for this test are typically ready within about 7 days of your blood draw. You'll get a notification once they're posted to your account, where you can view the details and download the full report.

Who should consider this test?

This test is a good fit for anyone who has been told they have low platelets without a clear explanation. It's especially useful if you're being evaluated for ITP or considering treatment with a thrombopoietin receptor agonist drug, since knowing your baseline TPO level helps predict whether that expensive treatment is likely to work for you.

What symptoms indicate I may need this test?

Easy bruising, small red or purple spots on the skin, unusually heavy periods, bleeding gums, or nosebleeds that are hard to stop can all point to a platelet problem. If a routine blood count already showed a low platelet number, this test can help explain why. Unexplained fatigue combined with these bleeding signs is also worth checking out.

What does high TPO mean?

A markedly elevated TPO level suggests your low platelet count is probably not simple ITP, since ITP usually causes only normal or slightly raised TPO. Very high levels can be a sign of genetic mutations affecting the CD110 receptor, which controls how your body responds to thrombopoietin. This matters because people with high TPO often don't respond well to thrombopoietin receptor agonist medications.

What causes high or low TPO levels?

High TPO can come from your body trying to compensate for very low platelet production, or from rare genetic changes in the CD110 receptor. Low or normal TPO alongside low platelets is more typical of ITP, where the immune system destroys platelets faster than they're made even though production signals are normal. Liver problems can also affect TPO since the liver is the main site where it's produced.

How often should I retest?

If you're being monitored for a thrombocytopenia diagnosis or tracking response to a new treatment, retesting every few months or as advised by your treatment plan is reasonable. If your first result was borderline, a repeat test after a few weeks can help confirm the pattern. Use the trends feature in your account to keep an eye on 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.

TPO Blood Test - Evaluate Low Platelet Causes

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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