Prothrombin Time with INR

Prothrombin Time with INR

This test may help measure how long it takes for your blood to clot. A healthcare provider may use this to monitor medication in your blood if you are taking warfarin (a type of medication known as a blood thinner which can treat and prevent blood clots). Read more
Test details

Sample type:
Blood
Preparation:
You do not need to do anything special to prepare for the sample collection. This test does not require fasting.
Test type: In Person
Find Patient Service Centers
$42.00
+ $6.00 Physician Service Fee
Unfortunately this test is not right for you based on your responses.

What
What
Our PT/INR Test measures how long it takes for blood to clot.
Who
Who
Must be 18+ years of age to purchase.
How
How
Blood
Schedule an appointment, then visit a Quest Diagnostics patient service center location.
About the Test

Our Prothrombin Time with INR (PT/INR) Test measures how long it takes for your blood to form a clot (coagulate). Anticoagulants (anti-clotting medications) change the way your blood clots. Warfarin is a commonly prescribed anticoagulant, or blood thinner, that prevents blood from clotting. Anticoagulant therapy must be carefully monitored to make sure the dosage is right for the patient; otherwise, severe and persistent bleeding or excessive blood clotting (hypercoagulation) can occur.

 

How it works

  • In-person
  • In-home sample collection
1

Buy a lab test & schedule an appointment

No doctor visit required for purchase. Book a visit to one of 2000+ Quest locations.

2

Visit Quest for sample collection

3

Get fast results online

Access results online as soon as they’re available.

4

Get physician support

Discuss your results with an independent physician at no extra cost.

1

Buy a lab test
+ in-home sample collection

If in-home service is available in your area, purchase for an additional $79 fee.

2

Schedule an appointment

After you make a purchase, Quest Mobile will contact you to schedule an in-home sample collection appointment.

3

In-home sample collection

A Quest Mobile phlebotomist will collect your sample and deliver it to Quest Diagnostics.

4

Get fast results online

Access results online as soon as they’re available. Discuss your results with an independent physician at no extra cost.

 

In-home sample collection is not available in all locations.
Is in-home sample collection available near me?

FAQs