Prothrombin Time (PT) with INR & PTT

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About Our Prothrombin Time (PT) with INR & PTT

The Prothrombin Time (PT) with International Normalized Ratio (INR) and Partial Thromboplastin Time (PTT) Panel is a comprehensive blood test used to evaluate how well your blood clots. Proper clotting is essential to prevent excessive bleeding or dangerous blood clots, and abnormalities can signal serious underlying conditions.

This panel assesses multiple pathways of the body’s coagulation system, offering a complete picture of clotting function. It is commonly used to diagnose bleeding or clotting disorders, evaluate unexplained bruising or bleeding, and assess overall clotting risk before medical procedures.

The PT and INR portion of the test is especially important for individuals taking anticoagulant medications such as warfarin, as it helps ensure medication levels are effective yet safe. Meanwhile, the PTT test evaluates different clotting factors and is often used to monitor heparin therapy or detect inherited bleeding disorders.

Together, these tests provide critical insight into clotting balance and are frequently used in routine care, hospital settings, and long-term disease management. Early detection of clotting abnormalities allows for timely treatment adjustments and reduces the risk of serious complications.

What Is Included In This Test?

This panel includes three closely related clotting measurements:

Prothrombin Time (PT): Measures how long it takes blood to clot via the extrinsic and common pathways
International Normalized Ratio (INR): Standardizes PT results across laboratories, especially for warfarin monitoring
Partial Thromboplastin Time (PTT): Measures clotting via the intrinsic and common pathways

These results help:

Assess bleeding or clotting risk
Monitor anticoagulant medications
Detect clotting factor deficiencies
Evaluate liver function related to clotting
Support pre-surgical safety screening

Who Should Consider This Test?

This test is ideal for individuals who need evaluation or monitoring of blood clotting function.

You should consider this test if you:

Take blood-thinning medications such as warfarin or heparin
Have unexplained bleeding, bruising, or clotting
Are preparing for surgery or invasive procedures
Have a history of clotting or bleeding disorders
Have liver disease or suspected vitamin K deficiency
Are being evaluated for conditions like hemophilia or DIC

Regular testing helps ensure safe treatment and proactive management of clotting-related conditions.

Convenient, No-Appointment Testing

To complete your test:

Order online through our website
Use the lab locator to find a nearby testing location
Walk in; no appointment required
Access your results securely in your HealthLabs.com account within one to three business days

110% Price Guarantee!

If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.

Common Questions:

Why are PT and INR tested together?

INR standardizes PT results, making them reliable across different laboratories.

Can these tests detect clotting disorders?

Yes, they help identify clotting factor deficiencies and abnormal coagulation.

Will anyone see my results besides me?

Your results are stored in your secure online account. They are not shared with anyone else. If you choose, you can print or download them to share with your own doctor.

Do I need to fast before this test?

Fasting is not required for this panel. You can eat and drink normally unless your doctor has given you other instructions.

Can I talk to someone about my results?

Yes. If your results come back abnormal or if you simply have questions, our team is here to support you. You can text our Patient Services team at 1800-579-3914.

Can I use insurance to pay for this test?

In order to ensure your privacy, we do not bill insurance directly, but you may use HSA or FSA funds. This keeps your results and testing completely private from insurers. We can also provide you with an itemized receipt for insurance reimbursement purposes if you need it.