On your lab requisition: Labcorp “Prothrombin Time (PT)” (test no. 005199)
The short answer
Prothrombin Time with INR measures Prothrombin Time and INR from a standard blood draw. At TestWell it costs $23.99 plus a $6 lab processing 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 or Labcorp.
Hospital Lab
$120
cash pay
Other Labs
$42
+ lab fees
TestWell
$23.99
+ $6 lab processing fee
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.
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.
Blood health testing evaluates your blood cells, clotting factors, and oxygen-carrying capacity to detect anemia, infection, bleeding disorders, and other hematologic conditions.
Anyone investigating unexplained fatigue, frequent infections, bruising, or as part of a routine health check.
Sample Type
Blood draw
Fasting
Not required
Results In
1–3 business days
Performed At
Quest or Labcorp
2 biomarkers tested · 1 measured, 1 calculated from them
Your Prothrombin Time with INR results will include values for each of the 2 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 1–3 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.
No fasting required. Take your usual medications including blood thinners.
What can throw off this result
Physician-reviewed “Before your test” pages — what each factor does, for how long, and what to do about it.
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 Sep 12, 2026 |
| Labcorp OnDemand (Labcorp's own site) | $39.00 | $39.00 | list price checked Sep 12, 2026 |
| Hospital outpatient lab, self-pay (typical) | $120.00 | $120.00 | Reference figure; hospital charges vary widely by facility and are often higher |
23% less than the lower lab-direct list price, for the same draw at the same lab. Lab test codes: Quest test code 8847 · Labcorp test no. 005199. 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
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.
Blood draw. Sample is collected at a Quest, Labcorp, or BioReference patient service center near you, or via at-home phlebotomy where available.
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.
No fasting required for the Prothrombin Time with INR. No fasting required. Take your usual medications including blood thinners.
The Prothrombin Time with INR is available at Quest and Labcorp 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.
Ordered directly, a Prothrombin Time with INR test lists at $42.00 at Quest Health (Quest Diagnostics' own site) and $39.00 at Labcorp OnDemand (prices checked September 2026). TestWell orders the same test at the same Quest or Labcorp patient service centers for $23.99 — $29.99 all-in with the $6 per-order lab processing fee — paid out of pocket at checkout with no insurance, doctor's visit or draw fee; HSA and FSA cards are accepted.
Aspirin and blood thinners can change a Prothrombin Time with INR test result without anything being wrong. Aspirin and blood thinners can raise INR — expected; keep the draw at a consistent time relative to the dose. Each factor is covered on our physician-reviewed "Before your test" pages; when one applies, the fix is usually to remove it and retest.
The CPT code for a Prothrombin Time with INR test is 85610. You can order it from TestWell for $23.99 — no doctor's visit or insurance required, with results in 1–3 business days.
The Prothrombin Time with INR test is Quest Diagnostics test code 8847, Labcorp test number 005199 ("Prothrombin Time (PT)") (CPT 85610). TestWell orders it under those codes for $23.99 at Quest or Labcorp — no doctor's visit or insurance required, results in 1–3 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
Related guide
PT/INR Explained: What the Prothrombin Time and INR Blood Test Measures and What Your Result Means
TestWell Price
$23.99
+ $6 lab processing fee at checkout
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.
No insurance needed · HIPAA compliant
Better value: the Blood Clotting Panel
Save $50.97This test is part of the Blood Clotting Panel — 4 tests · 18 biomarkers for $149.99, $50.97 less than à la carte.
$149.99$200.96
4 tests · 18 biomarkers
Frequently ordered together
Customers who ordered Prothrombin Time with INR also added these for a more complete health picture.
Not sure where to start?
Prothrombin Time with INR
$23.99