On your lab requisition: Quest “Celiac Disease Comprehensive Panel” (test code 19955)
The short answer
Celiac Disease Screen (tTG-IgA + Total IgA) measures tTG-IgA, Total IgA and Reflex IgG celiac antibodies (if IgA is low) from a standard blood draw. At TestWell it costs $49.99 plus a $6 lab processing fee, needs no fasting, and results post in 2–6 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest.
Hospital Lab
$200
cash pay
Other Labs
$80
+ lab fees
TestWell
$49.99
+ $6 lab processing fee
This is the test guidelines recommend first when celiac disease is a possibility: tissue transglutaminase IgA (tTG-IgA), the most accurate single antibody test for celiac disease, run together with a total IgA level. The total IgA matters because a small share of people make too little IgA for the tTG-IgA result to be reliable; when IgA is low, the lab automatically reflexes to IgG-based celiac antibodies so the screen still gives an answer. A positive result is followed up with a clinician, usually with confirmatory testing before any diagnosis. You must be eating gluten regularly for several weeks before the draw — a gluten-free diet makes the antibodies disappear and the test falsely negative. If you have already had a borderline result, know you are IgA-deficient, or want every celiac antibody in one draw, the Celiac Disease Panel runs tTG-IgA, tTG-IgG, DGP-IgA, DGP-IgG and total IgA up front.
Sample Type
Blood draw
Fasting
Not required
Results In
2–6 business days
Performed At
Quest
3 biomarkers tested
Your Celiac Disease Screen (tTG-IgA + Total IgA) results will include values for each of the 3 biomarkers tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 2–6 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you. Already have results? Analyze them with your AI assistant against our physician-reviewed ranges.
You must be eating gluten daily for at least 2–3 weeks before this test. Do not start a gluten-free diet before testing.
TestWell orders the same Celiac Disease Screen (tTG-IgA + Total IgA) the labs run for doctors' offices, so you can walk into Quest Diagnostics with our requisition — no doctor's visit, a licensed physician authorizes the order, and most patient service centers take walk-ins. The table shows each lab's own test code, the name printed on the requisition, what the lab charges on its own consumer site, and the price through TestWell at that lab (plus one $6 fee per order).
| Lab | Test code | On the requisition | Lab's own site | Through TestWell |
|---|---|---|---|---|
| Quest Diagnostics | test code 19955 | “Celiac Disease Comprehensive Panel” | not sold direct | $49.99 + $6 |
You choose the lab at checkout; the requisition is written for that lab and arrives by email within minutes. New York and New Jersey orders draw at BioReference. Lab-direct prices are read from the labs' public pages and re-checked regularly.
Where to get it near you: patient service centers by state and city · search by ZIP code
A Celiac Disease Screen (tTG-IgA + Total IgA) costs $49.99 at TestWell — $55.99 all-in, since the $6 lab processing fee is charged once per order and there is no draw or physician fee. Hospital outpatient labs typically bill around $200.00 self-pay. With insurance you pay your plan's negotiated rate against your deductible; TestWell's price is fixed before the draw and HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest) | $49.99 | $55.99 | Includes the one $6 lab processing fee, charged once per order |
| Hospital outpatient lab, self-pay (typical) | $200.00 | $200.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 19955. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
Celiac Disease Screen (tTG-IgA + Total IgA) results are typically ready in 2–6 business days after your draw at Quest. TestWell emails you the moment they post, and your results dashboard shows each marker against its reference range with a plain-English explanation.
No, fasting is not required for a Celiac Disease Screen (tTG-IgA + Total IgA) — you can eat normally and book any time of day. You must be eating gluten daily for at least 2–3 weeks before this test. Do not start a gluten-free diet before testing.
Order the Celiac Disease Screen (tTG-IgA + Total IgA) online from TestWell for $49.99 (plus a $6 per-order lab processing fee) — no doctor's visit, referral or insurance needed. A licensed physician authorizes the order, then you walk into any Quest patient service center near you for the draw (the lab locator on our site lists the closest ones by ZIP code), and results arrive in 2–6 business days.
The Celiac Disease Screen (tTG-IgA + Total IgA) is Quest Diagnostics test code 19955 ("Celiac Disease Comprehensive Panel"). TestWell orders it under that code for $49.99 at Quest — no doctor's visit or insurance required, results in 2–6 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed October 2026
TestWell Price
$49.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Frequently ordered together
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Celiac Disease Screen (tTG-IgA + Total IgA)
$49.99