Blood Test: Celiac Disease Antibody Screen
This panel contains the following tests:
- Deamidated gliadin IgA — This test may be positive in some people with CD who are negative for tTG, especially children less than 2 years old.
- Tissue transglutaminase IgA — This is the most sensitive (>90%) and specific (>95%) blood test for celiac disease and is preferred for the detection of CD in people over 2 years of age. Although "tissue" is in the name of this test it is measured in the blood.
- Serum IgA level — This test is used to detect IgA deficiency. This deficiency occurs in about 2-3% of people with CD leading to false negative test results.
Celiac disease is a lifelong digestive disorder affecting both children and adults. The disease is likely under-diagnosed in that it may affect as much as 1% of the population of the United States. This condition is characterized by an immune-mediated reaction to gluten that causes inflammation in the small intestine and does not allow food to be properly absorbed.
Celiac disease is not a food allergy and is not the same as a wheat allergy… it is actually an autoimmune disease. This screening test is for anyone who suspects that grains like wheat, spelt, rye, and barley may be affecting their health. It is also suggested that the food safe allergy test be done as well since a person can react to wheat/grains in different ways. Celiac testing looks at the autoimmune mediated reaction component while the food safe test looks at a delayed food sensitivity reaction.
If a person stops eating foods with gluten (for typically 3-6 months) before being tested, the results may be negative for celiac disease even if the disease is present. If your doctor suspects that you have celiac disease, and you are already on a gluten-free diet for several months, he or she may suggest adding wheat/gluten back into your diet before testing.
Fasting is not required for this test. Take all medications as prescribed.
1) Order your test online or over the phone.
2) Download and return this authorization form to us.
3) You’ll then receive a blood requisition in the mail.
4) Take the requisition form to a LabCorp location near you and have your blood drawn. (See FAQ below for exceptions.)
5) You’ll receive results in 3 days to 3 weeks (depending on the complexity of the tests involved).
6) Your results will be sent directly to you. (You can choose fax, email, or mail.)
7) You can then discuss your results directly with your own doctor.
FREQUENTLY ASKED QUESTIONS
Q) Where do I go to get my blood drawn?
A) Laboratory Corporation of America performs all of our blood draws at no extra charge to you. Not available in Maryland. Simply click here to locate the LabCorp Patient Service Center near you. (However, if you live in Massachusetts, New York, New Jersey or Rhode Island, you will receive a blood draw kit per state law … and additional draw fees may apply.)
Q) Where can I find a lab near me?
A) Click here to find a lab near you.
Q) What laboratory will analyze my blood tests?
A) Laboratory Corporation of America provides our laboratory services.
Q) Do you use any other labs besides LabCorp?
A) Yes. Life Extension National Diagnostics Inc., also offers 24-hour urine tests and blood spot tests which are performed by other specialty laboratories. These tests are packaged as kits and collected by you in the convenience of your own home.
Q) Can I order Life Extension blood tests if I live outside the United States?
A) No. We can only offer blood tests to people residing in the continental US and in Anchorage, AK.
Q) Who orders the blood tests for me?
A) Life Extension National Diagnostics, Inc., contracts with physicians who will order your tests but will not diagnose or treat you.
Q) Will I receive an actual prescription for these blood tests?
A) You will receive a LabCorp “Patient Service Center Request Form” in the mail (USPS- first class) which you will take with you for the blood draw. (If you live in Massachusetts, New York, New Jersey or Rhode Island, you will receive a blood draw kit due to state law. Additional draw fees may apply.) Your requisition form or kit should arrive within 5–7 business days from the time your order is placed.
Q) Is there an expiration date on my blood test order?
A) Yes. Your requisition form for the blood draw is only good for 6 months from the date the order is placed.
Q) How and when will I get my results?
A) Results from Life Extension National Diagnostics, Inc., can be sent to you by snail mail, e-mail or fax. Or you can view them online. The choice is yours. And they usually arrive within 5–14 business days from the date of the blood draw, depending on the complexity of the blood tests ordered.
Q) Who can explain the results to me?
A) Discuss your results with your personal physicians and/or health care provider. You can also call a Life Extension Health Advisor free of charge to review your results.
Q) Why not just go to my own doctor and have him/her order blood tests for me?
A) We can probably save you a lot of money thanks to our partnership with LabCorp. We offer unique blood panels you won’t find elsewhere. And your own doctor may not be willing to write a prescription for blood tests for preventive purposes.
Q) Are these tests covered by my insurance company?
A) This blood test service is for informational purposes only and no specific medical advice, ICD-9 codes, Tax ID’s or CPT codes will be provided. When you purchase a blood test from Life Extension National Diagnostics, Inc., you are doing so with the understanding that you are privately paying for these tests. There is absolutely no billing to Medicare, Medicaid or private insurance.
Q) What are the blood test requisition options?
A) Your blood test requisition options are LabCorp requisition form and blood lab kit. If you choose “LabCorp Requisition Form”, you will receive a form to present to a Patient Service Center in your area. The requisition you receive will have all the ordering information necessary for you to have your blood drawn. Please note that this option is not allowed in the states of NY, NJ, RI, MA or MD.
Alternatively, if you choose “Blood Lab Kit”, you will receive a kit containing all the necessary blood collection tubes, instructions and pre-paid shipping labels. It will be necessary for you to find a local doctors office, hospital, or local clinic to draw and process your blood. A local draw fee may be incurred.
Q) I am a parent. Can I order a blood test for my child, who is under 18?
A) Yes. Click here to download the Parental Consent form.
Q) Do you have sample reports so I can see what that might look like?
Click to view the following sample reports (in PDF) format:
Female Panel Sample Report
Female Comprehensive Hormone Panel Sample Report
Male Panel Sample Report
Male Comprehensive Hormone Panel Sample Report
Food Safe Allergy Test Sample Report
Heavy Metals Panel Sample Report
After you place your order online, please download and return this form to us: Click here to download (PDF).
This is test # LC334971.
The laboratory services are for informational purposes only. It is not the intention of Pine Street Clinic, LLC, National Diagnostics, Inc, or Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.
Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither Pine Street Clinic, LLC, National Diagnostics, Inc, or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.