What's this test for?

This test is ideal if you're following up on abnormal blood work or a suspicious tissue sample and need more detail about the specific cells involved. CD38 is a marker found on certain blood and immune cells, and checking for it helps characterize unusual cells that may show up during a workup for blood-related conditions. It's typically used as part of a broader evaluation, not as a standalone screening test for the general public.

What's included in this test?

This test uses a lab technique called immunohistochemistry (IHC) to look for the CD38 marker on cells in a tissue or blood sample. Checking for this marker matters because certain cells light up with CD38 while others don't, which helps narrow down what type of cell is present. A written interpretation is included so the result is explained in context, not just given as a raw positive or negative.

What happens after I get my results?

Your results will show up in your account along with an explanation of what a positive or negative CD38 finding means for the sample tested. Because this is a specialized cell-marker test, next steps usually depend on the full clinical picture, so if your result is unexpected, it's worth having a follow-up sample or an additional panel run for a fuller picture. You can download the full lab report from your account at any time, and if you retest in the future, the trends feature lets you compare results side by side.

How can I naturally support healthy immune cell function?

While this test measures a specific cell marker rather than general immune health, everyday habits like eating a balanced diet, getting consistent sleep, staying active, and managing stress all support your immune system overall. Reducing alcohol intake and avoiding smoking also help your body's cells function normally. These habits won't change a CD38 result, but they support your overall well-being while you sort out next steps.

When will I get my results?

Results for this test are typically available within about 7 days because CD38 immunohistochemistry with interpretation requires detailed lab analysis and a written summary. You'll get a notification as soon as your results are ready to view in your account. If your results are taking longer than expected, you can check your account for status updates.

Who should consider this test?

This test is typically considered when a previous blood test, biopsy, or imaging finding raised questions about specific cell types that need further characterization. It's often used as a follow-up step rather than a first test, so it makes the most sense if you already have a reason to look closer at particular cells. If you're unsure whether this is the right test for your situation, reviewing your prior results first can help clarify if CD38 marker testing is relevant.

What symptoms might lead someone to need this kind of cell marker test?

People are often referred toward this kind of testing after noticing unexplained swollen lymph nodes, persistent fatigue, unexplained bruising, frequent infections, or abnormal results on a routine blood count. These symptoms alone don't point to any single cause, which is why more detailed marker testing like this can help clarify what's going on at the cellular level. If you're experiencing these symptoms without a clear explanation, this type of test is often used alongside other blood work to get more detail.

What does a positive CD38 result mean?

A positive result means the marker was detected on the cells in your sample, which tells the lab more about what type of cell is present. On its own, a positive result isn't necessarily alarming — many normal cell types can carry this marker — so it's meant to be interpreted together with other test findings, not in isolation. The written interpretation included with your results explains what the finding means in the context of your specific sample.

What does a negative CD38 result mean?

A negative result means the marker wasn't detected on the cells examined, which can help rule out certain cell types from consideration. This is useful information when narrowing down a diagnosis, since ruling things out is just as valuable as finding a match. As with a positive result, a negative finding is best understood alongside your full set of test results.

How often should I retest with a CD38 marker panel?

This isn't a routine test you'd repeat on a regular schedule — it's typically ordered once for a specific sample tied to a particular concern. If your situation changes, like new symptoms appear or a related blood test comes back abnormal, retesting might be recommended at that time. Because this is a specialized test tied to a specific clinical question, there isn't a general "every X months" retesting guideline.

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.

CD38 IHC Test - Blood Cell Marker Analysis

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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