Hospital
$120+
Other Labs
$42
TestWell
$23.99
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.
Sample Type
Blood draw
Fasting
Not required
Results In
1–3 business days
Performed By
Quest
2 biomarkers tested
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.
No fasting required. Take your usual medications including blood thinners.
TestWell Price
$23.99
No insurance needed · HIPAA compliant
Frequently ordered together
Customers who ordered Prothrombin Time with INR also added these for a more complete health picture.
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$24.99
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General inflammation marker — elevated in infections, autoimmune conditions, and chronic disease.
$19.99
Prothrombin Time with INR
$23.99