Shellfish Allergy Test
Shellfish Allergy Test can be requested without a referral, and this overview covers what to expect. A shellfish allergy test checks your blood for antibodies that may react to proteins found in shellfish. It is usually ordered when someone has had allergic symptoms after eating shellfish, or when a clinician wants to confirm or rule out a shellfish allergy.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $159
- Referral
- Not required
A shellfish allergy test checks your blood for antibodies that may react to proteins found in shellfish. It is usually ordered when someone has had allergic symptoms after eating shellfish, or when a clinician wants to confirm or rule out a shellfish allergy.
What it measures
- Total IgE — A general measure of allergy-related antibodies in your blood.
- Shellfish-specific IgE — Antibodies that target proteins from shellfish such as shrimp, crab, lobster, or clam.
- Shrimp-specific IgE — A common marker because shrimp is a frequent trigger.
- Crab-specific IgE — Checks for antibodies that may react to crab proteins.
- Lobster-specific IgE — Checks for antibodies that may react to lobster proteins.
- Clam or mollusk-specific IgE — Checks for antibodies that may react to mollusks like clams or mussels.
Who it is for
A primary care clinician, allergist, or other healthcare professional typically orders this test. It may be ordered for adults or children with suspected reactions to shellfish.
Preparation
No fasting is required for this blood test. Tell your clinician about any medications you take, especially antihistamines, because they may affect some allergy tests.
Results and what they mean
Results are reported as a number for each shellfish allergen, often with a reference range or class. A clinician interprets these numbers alongside your symptoms and history; a positive result alone does not always mean you have a true allergy. This is general information, not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the shellfish allergy test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Does this test hurt?
It uses a standard blood draw, so you may feel a brief pinch when the needle goes in.
How soon will I get results?
Results are usually available within 1 to 3 business days.
Can I eat shellfish before the test?
Yes. Eating shellfish before the test is not known to change the result, but follow any instructions from your clinician.
Do I need to stop my allergy medicine?
Ask your clinician. Some medicines, such as antihistamines, can affect allergy testing, but do not stop any medicine without checking first.