Prothrombin Time (PT) with INR Popular
- Direct-to-consumer lab testing; No doctor referral or insurance necessary
- 4,500+ conveniently located CLIA-certified U.S. labs
- Comprehensive and easy-to-use website
- Most Results in 1-3 days
- 110% price guarantee
About Our Prothrombin Time (PT) with INR
Note: Fasting is not required for this test.
Our Prothrombin test is a blood test that measures the following: international normalized ratio (INR); prothrombin time (PT), and activated partial thromboplastin time (aPTT or PTT) to help determine if there are issues with blood clotting.
Overall the Prothrombin test (PT) is used primarily to investigate unexplained bleeding or clotting. It's commonly ordered to help diagnose clotting or bleeding disorders or to aid in monitoring individuals who are taking anticoagulants like Warfarin (also known as Coumadin®).