--- title: Prothrombin Time with INR Test type: test id: prothrombin-inr url: "https://www.test-well.com/tests/prothrombin-time-inr" price_usd: 23.99 lab_fee_usd: 6 all_in_usd: 29.99 cpt: 85610 category: Blood Health sample: Blood draw fasting_required: false results_in: "1–3 business days" labs: - Quest orderable: true reviewed_at: 2026-09-14 order_url: "https://www.test-well.com/cart?add=prothrombin-time-inr&utm_source=ai_agent&utm_medium=markdown" --- # Prothrombin Time with INR Test > Prothrombin Time with INR measures Prothrombin Time and INR from a standard blood draw. At TestWell it costs $23.99 plus a $6 lab fee, needs no fasting, and results post in 1–3 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest. **Ordering for surgical clearance? Allow 6–8 days before your procedure.** Results typically post 1–3 business days after your blood draw — but between visiting the lab, weekend processing, and your surgical team's review, we recommend ordering at least 6–8 days ahead of surgery. An order placed the day before a procedure will not have results back in time. ## Key facts | Fact | Value | | --- | --- | | Price | $23.99 + $6 lab processing fee per order ($29.99 all-in for this test alone) | | CPT code | 85610 | | Sample | Blood draw | | Fasting | Not required | | Results | 1–3 business days | | Labs | Quest Diagnostics | | Biomarkers measured | 2 | | 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 Prothrombin Time with INR test tell you? Measures blood clotting time — essential for patients on blood thinners like Warfarin. Prothrombin Time (PT) measures how long it takes blood to clot. The INR (International Normalized Ratio) standardizes the result so it can be compared regardless of the testing method. This test is primarily used to monitor patients taking Warfarin (Coumadin) or other vitamin K antagonist anticoagulants, and to evaluate unexplained bleeding or clotting disorders. **Clinical use:** Blood health testing evaluates your blood cells, clotting factors, and oxygen-carrying capacity to detect anemia, infection, bleeding disorders, and other hematologic conditions. ## Who should order it? Anyone investigating unexplained fatigue, frequent infections, bruising, or as part of a routine health check. ## Biomarkers measured - [Prothrombin Time](https://www.test-well.com/biomarkers/prothrombin-time) - [INR](https://www.test-well.com/biomarkers/inr) ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $23.99 | $29.99 | 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 Prothrombin Time with INR test cost? A Prothrombin Time with INR test costs $23.99 at TestWell — $29.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Ordered directly from the labs' own consumer sites, the same test lists at $42.00 at Quest Health and $39.00 at Labcorp OnDemand (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $120.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible. | Where you order | Price | One test, all-in | Notes | | --- | --- | --- | --- | | TestWell (drawn at Quest or Labcorp) | $23.99 | $29.99 | Includes the one $6 lab processing fee, charged once per order | | Quest Health (Quest Diagnostics' own site) | $42.00 | $42.00 | [list price checked 2026-09-12](https://www.questhealth.com/product/prothrombin-time-with-inr/8847M.html) | | Labcorp OnDemand (Labcorp's own site) | $39.00 | $39.00 | [list price checked 2026-09-12](https://www.ondemand.labcorp.com/lab-tests/prothrombin-time-inr-pt-inr-test) | | Hospital outpatient lab, self-pay (typical) | $120.00 | $120.00 | Reference figure; hospital charges vary widely by facility and are often higher | Lab test codes: Quest test code 8847 · Labcorp test no. 005199. ## How do you prepare? No fasting required. Take your usual medications including blood thinners. ## Related conditions - [Anemia](https://www.test-well.com/conditions/anemia) (D64.9) - Hematologic disorder (D75.9) ## Common questions about the Prothrombin Time with INR test ### How long do Prothrombin Time with INR results take? Most Prothrombin Time with INR results are available in 1–3 business days after your specimen arrives at the lab. You'll get an email the moment results are ready, with everything viewable in your TestWell portal. ### What sample is collected for the Prothrombin Time with INR? Blood draw. Sample is collected at a Quest, Labcorp, or BioReference patient service center near you, or via at-home phlebotomy where available. ### How much does the Prothrombin Time with INR cost without insurance? On TestWell, the Prothrombin Time with INR is $23.99. Quest Direct lists comparable tests at $42. Walk-in hospital labs typically bill $120 or more without insurance. Insurance is not required — pay one all-in price. ### Do I need to fast before the Prothrombin Time with INR? No fasting required for the Prothrombin Time with INR. No fasting required. Take your usual medications including blood thinners. ### Where can I get the Prothrombin Time with INR done? The Prothrombin Time with INR is available at Quest patient service centers nationwide. Order online at TestWell, pick your preferred lab, and we'll generate a digital requisition for the location closest to you. ## How to order 1. Add to cart: https://www.test-well.com/cart?add=prothrombin-time-inr&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 1–3 business days with reference ranges and flags. ## Related - [PT/INR Explained: What the Prothrombin Time and INR Blood Test Measures and What Your Result Means](https://www.test-well.com/guides/pt-inr-explained) - [Blood Clotting Panel](https://www.test-well.com/tests/blood-clotting-panel) — 4 tests · $149.99 - [D-Dimer](https://www.test-well.com/tests/d-dimer) — $69.99 - [Factor V Leiden Mutation](https://www.test-well.com/tests/factor-v-leiden) — $131.99 - [Haptoglobin](https://www.test-well.com/tests/haptoglobin-test) — $101.99 - [Immature Red Blood Cell Test](https://www.test-well.com/tests/reticulocyte-count) — $19.99 - [PT and PTT (Prothrombin & Partial Thromboplastin Time)](https://www.test-well.com/tests/pt-and-ptt) — $54.99 - [All Blood Health tests](https://www.test-well.com/tests/category/blood-health) - [Full test directory](https://www.test-well.com/tests/directory) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-14. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/tests/prothrombin-time-inr 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.