Do I need a doctor to order celiac tests?

No. JustLabs provides physician-authorized orders for celiac antibody tests without a doctor visit.

How much does celiac testing cost?

The tTG IgG/IgA test costs about $18. Adding total IgA and nutritional markers brings the total to about $55.

Do I need to be eating gluten for accurate results?

Yes. You must be eating gluten regularly for at least 2-3 weeks before testing. A gluten-free diet can cause false-negative results.

Can a blood test confirm celiac disease?

Blood tests are the recommended screening tool. Positive antibody results are typically followed by an intestinal biopsy for definitive diagnosis.

How often should I retest?

After starting a gluten-free diet, antibodies should be rechecked in 6-12 months to confirm they are declining.

Lab Tests for Celiac Disease

Celiac disease is an autoimmune condition where eating gluten triggers your immune system to attack the lining of your small intestine. It affects about 1 in 100 people worldwide, but up to 80% of cases go undiagnosed. Lab testing for celiac disease measures specific antibodies your body produces in response to gluten. The tissue transglutaminase (tTG) antibody test is the primary screening tool, ideally combined with total IgA to ensure accuracy. JustLabs lets you order celiac screening tests online without a doctor visit.

Recommended Tests

TTG Antibodies

$40

Tissue transglutaminase antibodies for celiac disease screening.

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CBC w/ Diff

Comprehensive blood cell analysis including red cells, white cells, platelets, and white cell differential.

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Understanding Your Results

Test	Normal Range	Low Means	High Means
tTG IgA/IgG	<4 U/mL (negative)	Celiac disease unlikely	Strong indicator of celiac disease
Total IgA	81–463 mg/dL	IgA deficiency — tTG IgA may be falsely normal	Typically not clinically significant
Ferritin	12–300 ng/mL	Malabsorption from intestinal damage	Inflammation possible
Vitamin D	30–100 ng/mL	Common in undiagnosed celiac (malabsorption)	Unlikely unless supplementing heavily

How to Order

Order Online

Select your tests and pay securely. A licensed physician authorizes your order.

Visit Quest Diagnostics

Walk into any of 2,200+ Quest locations nationwide. No appointment needed.

Get Results

Results available in your account within 1-2 business days.

Frequently Asked Questions

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Content reviewed for accuracy by the JustLabs editorial team.