What's this test for?

This test is ideal if you're experiencing unexplained kidney problems, recurrent infections, or if you have a family history of certain kidney or immune-related conditions. Factor H plays a role in regulating part of your immune system, and low levels can be linked to certain rare kidney disorders. Your provider may have flagged this test if other results suggested your immune system's regulation isn't working as expected.

How should I prepare for this test?

See the pre-collection instructions on your order confirmation.

What's included in this test?

This test measures a single, specific protein in your blood that helps regulate part of your immune system's defense network. Checking this one marker matters because unusually high or low levels can point to issues with how your body controls immune activity, which can in turn affect kidney health. Because it's a single, focused marker, this test is often used to follow up on other findings rather than as a broad screening tool.

What happens after I get my results?

Your results will show up in your secure online account, with each value explained alongside its normal range so you know exactly where you stand. Depending on your result, next steps might include simple lifestyle adjustments, a repeat test in a few months to confirm a trend, or prompt attention if the value falls far outside the normal range. You can download a standard lab report directly from your account at any time. If you test again in the future, our trends feature lets you see how your levels change over time.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Once processing is complete, they'll be uploaded automatically to your secure online account, and you'll get a notification so you can log in and review them right away.

Who should consider this test?

This test is a good fit for people who have a personal or family history of certain rare kidney conditions, unexplained recurrent infections, or unusual immune-system findings on prior labs. It's also useful if you're being monitored for changes in an already-known condition related to immune regulation. If you're not sure whether this applies to you, reviewing your family health history and any prior lab results can help you decide.

What symptoms indicate I may need this test?

Signs that might prompt this test include unexplained swelling, changes in urine (like foaming or blood), fatigue linked to kidney issues, or a pattern of infections that seem to happen more often than usual. A family history of early kidney disease or related immune conditions is another reason to consider testing. These symptoms alone don't confirm a problem, but they're worth investigating with a focused lab test like this one.

What does high Factor H mean?

A higher-than-expected Factor H level isn't typically linked to a specific disease on its own and is less commonly a concern than a low level. It can sometimes reflect general inflammation or be a normal individual variation. If your result is high, retesting after addressing any active inflammation or infection is a reasonable first step.

What does low Factor H mean?

A lower-than-normal Factor H level means your body may have less of this protein available to help regulate part of your immune system's defense pathway. This has been linked in some cases to certain rare kidney conditions and immune-regulation disorders. If your level comes back low, it's worth discussing retesting or additional follow-up testing to understand the full picture, especially if you have related symptoms.

How often should I retest?

If your first result is within the normal range and you have no ongoing symptoms, you likely don't need to retest unless new symptoms appear. If your result was abnormal or borderline, retesting every 3 to 6 months can help you and your care team see whether the trend is stable, improving, or worsening. Using the trends feature in your account makes it easy to compare results side by side 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 H Blood Test - Immune & Kidney Health 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]