--- title: Celiac Disease Screen (tTG-IgA + Total IgA) Test type: test id: celiac-screen url: "https://www.test-well.com/tests/celiac-disease-screen" price_usd: 49.99 lab_fee_usd: 6 all_in_usd: 55.99 category: Inflammation & Autoimmune sample: Blood draw fasting_required: false results_in: "2–6 business days" labs: - Quest orderable: true reviewed_at: 2026-10-12 order_url: "https://www.test-well.com/cart?add=celiac-disease-screen&utm_source=ai_agent&utm_medium=markdown" --- # Celiac Disease Screen (tTG-IgA + Total IgA) Test > 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. **On your lab requisition:** Quest "Celiac Disease Comprehensive Panel" (test code 19955) ## Key facts | Fact | Value | | --- | --- | | Price | $49.99 + $6 lab processing fee per order ($55.99 all-in for this test alone) | | Sample | Blood draw | | Fasting | Not required | | Results | 2–6 business days | | Labs | Quest Diagnostics | | Biomarkers measured | 3 | | Physician authorization | Included — no doctor's visit, referral or insurance needed | | Payment | Card, HSA or FSA; cash-pay only (no insurance billing) | ## What does the Celiac Disease Screen (tTG-IgA + Total IgA) test tell you? The first-line celiac blood test — tTG-IgA with a total IgA check, and IgG-based reflex testing if your IgA is low. 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. ## Biomarkers measured - [tTG-IgA](https://www.test-well.com/biomarkers/ttg-iga) - [Total IgA](https://www.test-well.com/biomarkers/total-iga) - Reflex IgG celiac antibodies (if IgA is low) ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $49.99 | $55.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | Rhode Island is not served. Prices are identical online and in the lab; no draw fee or physician fee is added. ## How much does a Celiac Disease Screen (tTG-IgA + Total IgA) cost? 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. ## How do you prepare? You must be eating gluten daily for at least 2–3 weeks before this test. Do not start a gluten-free diet before testing. ## Common questions about the Celiac Disease Screen (tTG-IgA + Total IgA) test ### How long does it take to get Celiac Disease Screen (tTG-IgA + Total IgA) results? 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. ### Do I need to fast, or can I eat before a Celiac Disease Screen (tTG-IgA + Total IgA)? 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. ### Where can I get a Celiac Disease Screen (tTG-IgA + Total IgA) near me without a doctor? 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. ### What is the Quest test code for a Celiac Disease Screen (tTG-IgA + Total IgA)? 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. ## How to order 1. Add to cart: https://www.test-well.com/cart?add=celiac-disease-screen&utm_source=ai_agent&utm_medium=markdown 2. Create an account or sign in, confirm your state and preferred lab, pay by card, HSA or FSA. 3. A licensed physician authorizes the order (usually within minutes); the requisition arrives by email. 4. Walk into any Quest Diagnostics patient service center — no appointment needed at most sites. 5. Results post to your TestWell portal in 2–6 business days with reference ranges and flags. ## Related - [Celiac Disease Panel](https://www.test-well.com/tests/celiac-disease-comprehensive) — $124.99 - [Immunoglobulins Panel (IgG, IgA, IgM), Quantitative](https://www.test-well.com/tests/immunoglobulins-panel) — $59.99 - [Rheumatoid Arthritis Antibody Test (Anti-CCP)](https://www.test-well.com/tests/anti-ccp-antibody) — $32.99 - [Sed Rate (ESR)](https://www.test-well.com/tests/sed-rate-esr) — $24.99 - [All Inflammation & Autoimmune tests](https://www.test-well.com/tests/category/inflammation-autoimmune) - [Full test directory](https://www.test-well.com/tests/directory) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-10-12. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/tests/celiac-disease-screen Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.