What's this test for?

This test is ideal if you're experiencing hives, swelling, itching, stomach upset, or breathing trouble after eating shellfish like crayfish. It helps you find out if your immune system is reacting to crayfish proteins, which could explain those symptoms. Knowing this can help you decide whether you need to avoid crayfish and similar shellfish going forward.

What's included in this test?

This test measures one specific type of antibody your immune system makes when it reacts to crayfish proteins. Checking this antibody level matters because higher amounts are linked to a greater chance of having an allergic reaction if you eat crayfish.

What happens after I get my results?

Your results will show up in your account with an explanation of what a normal versus elevated IgE level means for crayfish sensitivity. If your result comes back elevated, a practical next step is avoiding crayfish and other shellfish while watching for symptoms, and retesting later if your diet or exposure changes. You can download a standard lab report from your account at any time, and use the trends feature to track this marker if you test again in the future. If you ever have a severe reaction like trouble breathing or swelling of the throat, seek emergency medical care right away.

How can I naturally support a healthy immune response to food allergens?

While you can't change an existing allergy naturally, you can support your overall immune balance with a varied diet rich in fruits, vegetables, and omega-3 fatty acids. Reducing processed foods and managing stress may help calm overall inflammation levels in the body. Staying well hydrated and getting enough sleep also supports a balanced immune response over time. These habits won't eliminate a shellfish allergy but may help your body handle everyday immune challenges better.

When will I get my results?

Results are typically ready within about 7 days of your lab visit. Once ready, you'll be able to view and download them directly from your account.

Who should consider this test?

This test is a good fit for anyone who has had symptoms like hives, swelling, or stomach discomfort after eating crayfish or other shellfish. It's also useful if you have a family history of shellfish allergies and want to check your own risk before trying crayfish. People who've had an unexplained allergic reaction at a meal that included shellfish may also want to consider this test.

What symptoms indicate I may need this test?

Common signs include skin reactions like hives, redness, or itching after eating crayfish, as well as swelling of the lips, face, or throat. Digestive symptoms like nausea, cramping, or vomiting shortly after eating shellfish can also be a clue. More serious signs like difficulty breathing or dizziness mean you should seek emergency care right away rather than waiting on a lab test.

What does a high crayfish IgE result mean?

A high result means your immune system has produced antibodies that recognize crayfish proteins as a threat, which raises the chance you'll have an allergic reaction if you eat it. The higher the level, the more likely a reaction could occur, though the result doesn't predict how severe a reaction would be. Many people with a high result choose to avoid crayfish and other shellfish to prevent symptoms.

What causes a high crayfish IgE level?

A high level happens when your immune system has been exposed to crayfish proteins and mistakenly identified them as harmful, triggering antibody production. This can happen after eating crayfish directly or sometimes through cross-reactivity with other shellfish like shrimp or lobster. Repeated exposure over time can sometimes increase antibody levels further.

How often should I retest?

If you've been avoiding crayfish and want to check whether your sensitivity has changed, retesting once every year or two is reasonable. If you experience new or worsening symptoms after any shellfish exposure, it's worth retesting sooner. Otherwise, there's no need to retest frequently if your diet and symptoms remain stable.

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.

Crayfish Allergy Test - IgE Antibody Blood 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]

Crayfish Allergy Blood Test (IgE Antibody Check)

Crayfish (rf320) IgE

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's included in this test?

What happens after I get my results?

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

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Crayfish Allergy Blood Test (IgE Antibody Check)

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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