LabInformationLab tests, explained

Shellfish Allergy Test in California

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. Across California, part of Pacific, the shellfish allergy test can be ordered directly and collected at a certified site — no referral required.

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.

Requesting the Shellfish Allergy Test in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. With coastal metros, inland towns, and rural counties with very different access to testing, it pays to schedule your collection in advance.

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.

Shellfish Allergy Test by city in California

All testing in California →   Full Shellfish Allergy Test guide →