What's this test for?

This test is ideal if you or your pathology team need more information about a tissue sample that's already been collected, often as part of a cancer workup. CD15 immunohistochemistry (IHC) is a specialized stain applied to tissue to help identify specific cell types, most commonly used to support diagnosis of certain blood cancers like Hodgkin lymphoma. It's typically ordered as a follow-up to an existing biopsy rather than as a standalone screening test.

What's included in this test?

This test involves a single specialized stain, CD15, applied to a tissue sample under a microscope by a pathologist. It matters because CD15 helps distinguish specific cell types, particularly Reed-Sternberg cells associated with Hodgkin lymphoma, from other similar-looking cells. This added clarity supports more accurate identification of what's happening in the tissue.

What happens after I get my results?

Your results will be available in your account along with an explanation of what the findings mean for the tissue sample tested. Because this is a specialized interpretive stain rather than a simple number, the report will describe the pattern found and what it typically indicates. If your results raise concerns, the report will outline reasonable next steps, and you can always download the full lab report from your account for your records. You can also revisit your results anytime through the trends feature to keep a history of your testing.

Who should consider this test?

This test is typically considered by people who already have a tissue biopsy on file and need additional clarity about the type of cells present, often in the context of a suspected lymphoma or other cancer. It's not a general screening test, so it usually makes sense only when there's an existing clinical reason, such as an abnormal biopsy result, prompting a closer look. If you're not sure whether this applies to you, review your prior pathology results before ordering.

What symptoms indicate I may need this test?

Symptoms that sometimes lead to this kind of specialized tissue testing include unexplained swollen lymph nodes, persistent fevers, night sweats, or unexplained weight loss. These symptoms alone don't confirm anything, but when paired with an existing biopsy, CD15 staining can help clarify what type of cells are involved. If you're experiencing these symptoms without a prior biopsy, this specific test likely isn't the right starting point.

When will I get my results?

Results are typically ready within about 7 days, since this is a specialized tissue stain that requires careful lab processing and interpretation rather than a quick blood draw. You'll receive a notification once your report is ready to view in your account. If timing is critical, keep in mind that specialized pathology tests like this one take longer than routine blood work.

What is CD15 and why does it matter?

CD15 is a marker found on the surface of certain cells that pathologists use to help tell different cell types apart under a microscope. It matters because some cancer cells, like the abnormal cells seen in Hodgkin lymphoma, tend to show a specific CD15 pattern that healthy cells typically don't. Identifying this pattern helps narrow down what type of condition may be present in the tissue.

What does a positive CD15 result mean?

A positive CD15 result means the marker was detected on the cells in your tissue sample, which can support a diagnosis of certain conditions like Hodgkin lymphoma when seen alongside other typical features. On its own, a positive result is one piece of a larger picture that pathologists put together using multiple stains and observations. It's not a definitive diagnosis by itself, so it's usually interpreted together with the rest of your pathology findings.

What causes an abnormal CD15 result?

An abnormal or positive CD15 result usually reflects the presence of specific abnormal cells in the tissue, such as those associated with certain lymphomas, rather than something you did or didn't do. It's a lab finding tied to the biology of the tissue sample itself, not a lifestyle-related result. Because of this, there aren't diet or lifestyle changes that affect this particular result.

What should I do if my results are abnormal?

If your CD15 result comes back abnormal, the next step is usually to review the full pathology report, since this stain is almost always interpreted alongside other markers and clinical information. Keep a copy of your downloadable report for your records, and use the trends feature if repeat testing is needed over time. If your symptoms are severe or worsening, such as significant unexplained weight loss or persistent high fevers, seek medical care promptly.

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.

CD15 IHC Test - Cancer Tissue 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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