Call: (877) 511-5227

Prothrombin Time (PT) and Partial Thromboplastin Time (PTT) with INR

NOTE: Multiple lab options. Use our Lab Locator to find closest.

Prothrombin Time (PT) and Partial Thromboplastin Time (PTT) with INR

Laboratory: LabCorp
Prothrombin Time (PT) and Partial Thromboplastin Time (PTT) with INR
Laboratory: Quest Diagnostics

The PT/PTT/INR test may be used to determine the cause of unexplained bleeding or blood clots that have formed. Several proteins (coagulation factors) are required for the body to form blood clots to help stop bleeding. If there are too little or too much of any coagulation factor this may cause excessive bleeding or excessive clotting.

The PT/INR test is commonly ordered to monitor the effectiveness of anti-coagulation medication. This test may also be ordered before a surgery in order to ensure patient safety.

1. Purchase Tests

Choose the test you want (be sure to pick the laboratory you want to use).

Pay by credit card or PayPal®.

You pay directly and we do not bill your insurance.

(Note: A $10 laboratory fee is added to your total when you purchase one or more blood tests.)

2. Visit a Lab

After purchasing your testing you will receive an email with your lab requisition.  Bring this form to the laboratory.

NOTE: Be sure to visit the appropriate laboratory! 

If you choose LabCorp only visit a Labcorp location. 
If you choose Quest Diagnostics only visit a Quest location!

Find Your Lab Location.

No appointment is needed, but making one can minimize your wait time. 

If you have selected the option to have an At Home Test Kit delivered to you, you will receive your test kit in the mail within 5 to 7 business days. (Not all tests are available as At Home Test Kits.)

3. Get Results

We’ll email you when your results are ready. Sign into your account to view and download your result reports.

Sample Type
Prepare For Your Test
No special prep required.
Also Known As
No other names specified