What's this test for?

This test is ideal if you're experiencing muscle weakness, stiffness, or difficulty relaxing your muscles after use, which can be signs of myotonic dystrophy type 1. It's also helpful if you have a family history of this genetic condition and want to know if you carry the gene change. Many people use this test to get clarity before starting a family or to explain unexplained muscle symptoms.

What happens after I get my results?

Your results will be available in your account, with an explanation of what a positive or negative finding means for the CTG repeat expansion. If your result shows an expansion, next steps typically include watching for symptoms and considering how this may affect family planning decisions. The full lab report can be downloaded from your account, and because this is a one-time genetic result, tracking over time isn't usually needed unless a repeat test is recommended for confirmation. If you have severe or worsening muscle symptoms, seek medical care promptly.

Who should consider this test?

This test is a good fit for people with a close relative diagnosed with myotonic dystrophy, since the condition runs in families. It's also worth considering if you have muscle weakness, stiffness, or unexplained fatigue that doesn't have another clear cause. Couples planning a pregnancy who want to understand their genetic risk before having children may also benefit.

What symptoms indicate I may need this test?

Common signs include trouble relaxing your grip after shaking hands, muscle stiffness that gets better with repeated movement, and general muscle weakness, especially in the face, neck, or hands. Some people also notice drooping eyelids, trouble swallowing, or early cataracts. If these symptoms run in your family or you're noticing them yourself, this test can help provide answers.

When will I get my results?

Results are typically ready within about 7 days after your sample is processed at the lab. This timeframe reflects the detailed genetic analysis needed to count the CTG repeats in the DMPK gene accurately. You'll receive a notification as soon as your results are posted to your account.

What is DMPK and why does it matter?

DMPK is a gene that gives instructions for making a protein important for normal muscle function. When this gene has too many repeated sections of DNA, called CTG repeats, it disrupts muscle cells and leads to myotonic dystrophy type 1. The more repeats present, the more likely symptoms are to appear, which is why counting them is so useful for understanding your genetic risk.

What does a positive result mean?

A positive result means an expanded CTG repeat was found in your DMPK gene, which is linked to myotonic dystrophy type 1. The number of repeats can give a general idea of how the condition might show up, though it doesn't predict everything about severity or timing. This information can help guide conversations about symptom management and family planning.

What causes CTG repeat expansions in the DMPK gene?

CTG repeat expansions are inherited from a parent who carries the expanded gene, and the number of repeats can actually grow larger when passed from one generation to the next. This is why family history plays such a big role in myotonic dystrophy risk. It's a genetic trait, not something caused by lifestyle or environment.

How often should I retest?

Since this is a genetic test looking at a DNA sequence that doesn't change over your lifetime, you typically only need to take it once. Retesting is generally only suggested if there were concerns about the original sample or if a confirmatory test is recommended. Your genetic result stays the same throughout your life.

What should I do if my results show a gene expansion?

Start by reviewing the detailed explanation in your report to understand your specific repeat count and what it may mean. It's a good idea to share this information with close family members, since they may also want to get tested. Keeping track of any new muscle symptoms and seeking medical care if you notice worsening weakness or swallowing difficulty is also a practical next step.

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.

DMPK DNA Test - Myotonic Dystrophy Type 1 Screening

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]

DMPK Gene DNA Test for Myotonic Dystrophy Type 1

DMPK DNA Test (DM1)

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

What's this test for?

What happens after I get my results?

Who should consider this test?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

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DMPK Gene DNA Test for Myotonic Dystrophy Type 1

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

1,000,000+ blood tests later, here's what our customers say