Lab test requirements · preparation, ID, referral, and timing United States · 15,280 communities
LabRequirements Know what your test requires

Pacific · Canavan Disease Carrier Test – Ashkenazi

Canavan Disease Carrier Test – Ashkenazi in California

Below is a plain-language overview of the canavan disease carrier test – ashkenazi. This test checks whether a person carries gene changes linked to Canavan disease, a rare inherited condition affecting the brain.

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 Canavan Disease Carrier Test – Ashkenazi 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
Fasting is required for this test — follow the collection lab's instructions.
Preparation
No special preparation is usually needed, but you should follow the instructions given by the collection site or laboratory. If you have questions about fasting or medications, ask the lab…
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

The Canavan disease carrier test is a genetic blood test that looks for four specific changes in the ASPA gene: E285A, Y231X, 433-2A>G, and A305E. It can show if a person carries one copy of a change, which usually causes no symptoms, or if a person has two copies, which is associated with the disease. This test is often offered to people with Ashkenazi Jewish ancestry because these changes are more common in that group.

What it measures

  • E285A — one of the four ASPA gene changes linked to Canavan disease
  • Y231X — one of the four ASPA gene changes linked to Canavan disease
  • 433-2A>G — one of the four ASPA gene changes linked to Canavan disease
  • A305E — one of the four ASPA gene changes linked to Canavan disease

What the test involves

A small sample of blood is collected, usually from a vein in the arm, during a standard blood draw. The sample is then sent to a laboratory for genetic analysis.

Why it is often ordered

A clinician may order this test to find out if a person carries a gene change that could be passed on to children. It is often considered when there is a family history of Canavan disease or when someone wants information for family planning.

Preparation

No special preparation is usually needed, but you should follow the instructions given by the collection site or laboratory. If you have questions about fasting or medications, ask the lab before your appointment.

How results are reported

Results are reported as positive or negative for each of the four gene changes, and a genetic counselor can help explain what they mean. Reference ranges and reporting methods can vary by laboratory, so always discuss your results with your healthcare provider.

Before you go

  • Whether any special preparation is needed before the blood draw
  • How long results typically take at that laboratory
  • Whether genetic counseling is available to help interpret results

Cities

Canavan Disease Carrier Test – Ashkenazi in California communities

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

Los Angeles12,121,244Canavan Disease Carrier Test – AshkenaziSan Francisco3,290,197Canavan Disease Carrier Test – AshkenaziSan Diego3,084,174Canavan Disease Carrier Test – AshkenaziRiverside2,022,285Canavan Disease Carrier Test – AshkenaziSacramento1,924,167Canavan Disease Carrier Test – AshkenaziSan Jose1,729,879Canavan Disease Carrier Test – AshkenaziFresno719,558Canavan Disease Carrier Test – AshkenaziConcord640,270Canavan Disease Carrier Test – AshkenaziBakersfield590,845Canavan Disease Carrier Test – AshkenaziMission Viejo588,540Canavan Disease Carrier Test – AshkenaziMurrieta509,526Canavan Disease Carrier Test – AshkenaziLong Beach466,565Canavan Disease Carrier Test – AshkenaziOakland437,548Canavan Disease Carrier Test – AshkenaziStockton406,822Canavan Disease Carrier Test – AshkenaziVictorville389,060Canavan Disease Carrier Test – AshkenaziModesto382,994Canavan Disease Carrier Test – AshkenaziLancaster381,732Canavan Disease Carrier Test – AshkenaziOxnard366,330Canavan Disease Carrier Test – AshkenaziIndio361,831Canavan Disease Carrier Test – AshkenaziAnaheim348,204Canavan Disease Carrier Test – AshkenaziAntioch322,796Canavan Disease Carrier Test – AshkenaziSanta Rosa314,196Canavan Disease Carrier Test – AshkenaziSanta Ana313,818Canavan Disease Carrier Test – AshkenaziIrvine297,868Canavan Disease Carrier Test – AshkenaziSanta Clarita275,230Canavan Disease Carrier Test – AshkenaziChula Vista274,818Canavan Disease Carrier Test – AshkenaziVisalia249,804Canavan Disease Carrier Test – AshkenaziFremont231,502Canavan Disease Carrier Test – AshkenaziSan Bernardino220,821Canavan Disease Carrier Test – AshkenaziThousand Oaks211,045Canavan Disease Carrier Test – AshkenaziMoreno Valley208,371Canavan Disease Carrier Test – AshkenaziFontana208,087Canavan Disease Carrier Test – AshkenaziSalinas199,290Canavan Disease Carrier Test – AshkenaziHuntington Beach198,735Canavan Disease Carrier Test – AshkenaziSanta Barbara198,240Canavan Disease Carrier Test – AshkenaziGlendale196,512Canavan Disease Carrier Test – AshkenaziHemet191,170Canavan Disease Carrier Test – AshkenaziVallejo181,882Canavan Disease Carrier Test – AshkenaziElk Grove175,510Canavan Disease Carrier Test – AshkenaziOntario175,223Canavan Disease Carrier Test – AshkenaziOceanside174,461Canavan Disease Carrier Test – AshkenaziRancho Cucamonga173,946Canavan Disease Carrier Test – AshkenaziGarden Grove172,708Canavan Disease Carrier Test – AshkenaziPalmdale167,987Canavan Disease Carrier Test – AshkenaziSanta Cruz165,933Canavan Disease Carrier Test – AshkenaziHayward162,254Canavan Disease Carrier Test – AshkenaziCorona157,844Canavan Disease Carrier Test – AshkenaziMerced157,617Canavan Disease Carrier Test – AshkenaziSunnyvale155,550Canavan Disease Carrier Test – AshkenaziPomona151,592Canavan Disease Carrier Test – AshkenaziEscondido151,443Canavan Disease Carrier Test – AshkenaziTorrance147,156Canavan Disease Carrier Test – AshkenaziRoseville145,687Canavan Disease Carrier Test – AshkenaziFairfield145,163Canavan Disease Carrier Test – AshkenaziFullerton142,964Canavan Disease Carrier Test – AshkenaziSanta Maria142,230Canavan Disease Carrier Test – AshkenaziOrange139,195Canavan Disease Carrier Test – AshkenaziPasadena138,771Canavan Disease Carrier Test – AshkenaziYuba City129,536Canavan Disease Carrier Test – AshkenaziSanta Clara127,922Canavan Disease Carrier Test – Ashkenazi