What's this test for?

This test is ideal if you're following up on unusual cells found in a biopsy or other tissue sample and need more information about what type of cell it is. It helps identify specific cell markers that are often used alongside other findings to characterize certain blood and tissue-related conditions. This test is typically ordered as part of a broader diagnostic workup rather than as a standalone screening tool.

What's included in this test?

This test looks at whether a specific marker called CD56 is present on the cells in your sample. This marker is useful because certain cell types express it and others don't, which helps narrow down what kind of cell is being examined. It's often used together with other similar marker tests to build a clearer picture.

What happens after I get my results?

Your results will be available in your account, with an explanation of what the finding means in the context of this marker. Because this is a specialized diagnostic test, next steps often involve looking at the result alongside other tests you may have had done, rather than acting on it in isolation. You can download the full lab report from your account at any time, and if you have follow-up testing later on, you can track results over time using the trends feature.

How can I naturally support healthy immune function?

While this specific test isn't about general immune health, keeping your immune system strong overall is always a good idea. Simple habits like eating a balanced diet, getting consistent sleep, managing stress, and staying active all support healthy immune cell function. Avoiding smoking and limiting alcohol also helps your body's natural cell repair processes.

When will I get my results?

Results for this test typically take about 7 days to process, since it involves specialized lab analysis rather than a quick blood draw. Once ready, they'll be uploaded directly to your account. You'll be able to view the full report and see how the finding is explained in plain terms.

Who should consider this test?

This test is generally considered when a biopsy or tissue sample has already shown unusual cells that need more specific identification. It's typically used as a follow-up test rather than a first step, often requested after another finding raises questions. If you've been told you need additional marker testing on a sample, this may be one of the tests involved.

What is CD56 and why does it matter?

CD56 is a marker found on the surface of certain cells, including some immune cells called natural killer cells and some nerve and muscle cells. Testing for its presence helps labs figure out what type of cell they're looking at under the microscope. This information matters because different cell types behave differently, and identifying them correctly is an important step in understanding a tissue sample.

What does a positive CD56 result mean?

A positive result means the cells in your sample carry this marker, which points toward certain cell types that commonly express it. This finding is usually interpreted together with other markers and tissue features rather than on its own. The full lab report explains what a positive finding suggests in the context of your specific sample.

What does a negative CD56 result mean?

A negative result means the cells tested did not show this marker, which helps rule out certain cell types from consideration. Like a positive result, this is most useful when looked at alongside other marker tests run on the same sample. Your report will explain how this fits into the overall picture.

What should I do if my results raise more questions?

If your report leaves you with questions about what the finding means for your specific situation, it's a good idea to have it reviewed together with any other test results or biopsy findings you've had. This test is often just one piece of a larger diagnostic puzzle. Keeping all your related lab reports organized in one place makes it easier to see the complete picture.

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.

CD56 IHC Test - Cell Marker Identification

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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