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Pacific · Walnut Allergy Test – Nut Allergies

Walnut Allergy Test – Nut Allergies in California

Walnut Allergy Test – Nut Allergies is a laboratory test you can request directly. A walnut allergy test measures the level of IgE antibodies your immune system makes in response to walnut proteins. It is used along with your history to help evaluate a possible walnut allergy.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in California

Here is what you need before ordering and completing the Walnut Allergy Test – Nut Allergies in CA. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Some tests require fasting or avoiding certain foods or drinks beforehand. You will be informed when you order — confirm the details with the collection lab.
Preparation
In most cases no special preparation is needed, but you should follow the instructions provided by the collection site. If you take medications, ask the lab or your clinician whether any…
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

This is a blood test that looks for specific IgE antibodies directed against walnut proteins. The presence of these antibodies suggests the immune system has been sensitized to walnuts, but it does not by itself prove that a clinical allergy exists. Clinicians interpret the result together with symptoms and other findings.

What it measures

  • Walnut-specific IgE antibody — Reflects immune sensitization to walnut proteins.
  • Total IgE (if included) — Shows the overall level of IgE antibodies in the blood.
  • Other nut-specific IgE (if a panel is ordered) — Helps check for reactions to related tree nuts.

What the test involves

A healthcare professional collects a small blood sample from a vein in your arm using a standard blood draw. The sample is then sent to a laboratory for analysis.

Why it is often ordered

A clinician may order this test when a person reports symptoms such as hives, swelling, stomach upset, or breathing trouble after eating walnuts or foods that may contain them. It is also sometimes used to help assess whether a known nut allergy is still present.

Preparation

In most cases no special preparation is needed, but you should follow the instructions provided by the collection site. If you take medications, ask the lab or your clinician whether any changes are needed before the draw.

How results are reported

Results are typically reported as a numeric level of walnut-specific IgE, often with a qualitative category such as negative, low, moderate, or high. Reference ranges and reporting formats vary by laboratory, so results should always be interpreted using the range provided by the performing lab.

Before you go

  • Whether any medications you take could affect the test
  • The exact turnaround time for results at your chosen lab
  • Whether a referral or order from a clinician is required

Cities

Walnut Allergy Test – Nut Allergies in California communities

Choose your city for local context and to order this test.

Los Angeles12,121,244Walnut Allergy Test – Nut AllergiesSan Francisco3,290,197Walnut Allergy Test – Nut AllergiesSan Diego3,084,174Walnut Allergy Test – Nut AllergiesRiverside2,022,285Walnut Allergy Test – Nut AllergiesSacramento1,924,167Walnut Allergy Test – Nut AllergiesSan Jose1,729,879Walnut Allergy Test – Nut AllergiesFresno719,558Walnut Allergy Test – Nut AllergiesConcord640,270Walnut Allergy Test – Nut AllergiesBakersfield590,845Walnut Allergy Test – Nut AllergiesMission Viejo588,540Walnut Allergy Test – Nut AllergiesMurrieta509,526Walnut Allergy Test – Nut AllergiesLong Beach466,565Walnut Allergy Test – Nut AllergiesOakland437,548Walnut Allergy Test – Nut AllergiesStockton406,822Walnut Allergy Test – Nut AllergiesVictorville389,060Walnut Allergy Test – Nut AllergiesModesto382,994Walnut Allergy Test – Nut AllergiesLancaster381,732Walnut Allergy Test – Nut AllergiesOxnard366,330Walnut Allergy Test – Nut AllergiesIndio361,831Walnut Allergy Test – Nut AllergiesAnaheim348,204Walnut Allergy Test – Nut AllergiesAntioch322,796Walnut Allergy Test – Nut AllergiesSanta Rosa314,196Walnut Allergy Test – Nut AllergiesSanta Ana313,818Walnut Allergy Test – Nut AllergiesIrvine297,868Walnut Allergy Test – Nut AllergiesSanta Clarita275,230Walnut Allergy Test – Nut AllergiesChula Vista274,818Walnut Allergy Test – Nut AllergiesVisalia249,804Walnut Allergy Test – Nut AllergiesFremont231,502Walnut Allergy Test – Nut AllergiesSan Bernardino220,821Walnut Allergy Test – Nut AllergiesThousand Oaks211,045Walnut Allergy Test – Nut AllergiesMoreno Valley208,371Walnut Allergy Test – Nut AllergiesFontana208,087Walnut Allergy Test – Nut AllergiesSalinas199,290Walnut Allergy Test – Nut AllergiesHuntington Beach198,735Walnut Allergy Test – Nut AllergiesSanta Barbara198,240Walnut Allergy Test – Nut AllergiesGlendale196,512Walnut Allergy Test – Nut AllergiesHemet191,170Walnut Allergy Test – Nut AllergiesVallejo181,882Walnut Allergy Test – Nut AllergiesElk Grove175,510Walnut Allergy Test – Nut AllergiesOntario175,223Walnut Allergy Test – Nut AllergiesOceanside174,461Walnut Allergy Test – Nut AllergiesRancho Cucamonga173,946Walnut Allergy Test – Nut AllergiesGarden Grove172,708Walnut Allergy Test – Nut AllergiesPalmdale167,987Walnut Allergy Test – Nut AllergiesSanta Cruz165,933Walnut Allergy Test – Nut AllergiesHayward162,254Walnut Allergy Test – Nut AllergiesCorona157,844Walnut Allergy Test – Nut AllergiesMerced157,617Walnut Allergy Test – Nut AllergiesSunnyvale155,550Walnut Allergy Test – Nut AllergiesPomona151,592Walnut Allergy Test – Nut AllergiesEscondido151,443Walnut Allergy Test – Nut AllergiesTorrance147,156Walnut Allergy Test – Nut AllergiesRoseville145,687Walnut Allergy Test – Nut AllergiesFairfield145,163Walnut Allergy Test – Nut AllergiesFullerton142,964Walnut Allergy Test – Nut AllergiesSanta Maria142,230Walnut Allergy Test – Nut AllergiesOrange139,195Walnut Allergy Test – Nut AllergiesPasadena138,771Walnut Allergy Test – Nut AllergiesYuba City129,536Walnut Allergy Test – Nut AllergiesSanta Clara127,922Walnut Allergy Test – Nut Allergies