Fish Allergy Testing
Below is a plain-language overview of the fish allergy testing. Fish allergy testing looks for antibodies in the blood that react to proteins found in fish. It is usually ordered when someone has had hives, swelling, stomach upset, or breathing trouble after eating fish or being near it, or when a clinician wants to check whether a fish allergy is present.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $159
- Referral
- Not required
Fish allergy testing looks for antibodies in the blood that react to proteins found in fish. It is usually ordered when someone has had hives, swelling, stomach upset, or breathing trouble after eating fish or being near it, or when a clinician wants to check whether a fish allergy is present.
What it measures
- Total IgE — A general measure of allergy-related antibody in the blood.
- Fish-specific IgE — Antibodies aimed at fish proteins, such as cod, salmon, or tuna.
- Cod-specific IgE — A common single-fish marker used to gauge sensitivity.
- Salmon-specific IgE — Checks reactivity to salmon proteins.
- Tuna-specific IgE — Checks reactivity to tuna proteins.
Who it is for
A primary care clinician, allergist, or pediatrician typically orders this test after a reaction or when allergy is suspected.
Preparation
No fasting is needed. Timing does not usually matter, and no special preparation is required.
Results and what they mean
Results are reported as antibody levels, often graded from low to high, alongside a reference range. A clinician interprets them together with your history, because a positive result alone does not always mean 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 fish allergy testing 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 a positive result mean I am allergic to fish?
Not always. It shows antibodies are present, but only a clinician can confirm whether you have a true allergy.
Can I eat fish before the test?
Yes. No fasting or diet changes are needed before this blood draw.
How long until results are ready?
Most results return in about 1-3 business days.
Will this test tell me which fish to avoid?
It may show reactions to specific fish, but your clinician will advise on which ones to avoid.