You can save time by checking your INR at home

If you have been on oral warfarin therapy for more than 90 days, you may be able to test your INR at home.

Self-testing your INR enables you to take control of your healthcare — and you’ll potentially save the time traveling to a lab or doctor’s office. Self-testing does require a prescription, so the first step is to discuss your interest with your doctor.

Good candidates for self-testing are interested and willing to perform their own tests, or have a caregiver who can assist them. You’ll need to test, and report the results, in accordance with your doctor’s prescription. Healthcare professionals who have been trained to provide training will help give you the confidence to perform a self-test.

In fact, self-testing may be covered by Medicare and many major insurance plans. (Coverage may vary based on patient's conditions and other factors.)

How does self-testing work?
What is an INR test? 

To measure how long it takes blood to clot, your doctor will order an INR test, or international normalized ratio test. 
•  Your doctor will decide what INR number is best for you and can adjust your dose of warfarin to keep your INR within a target range.
•  A small blood sample is taken from a fingerstick.


Why test at home?

INR tests are typically performed in a hospital, medical lab or doctor’s office, but testing at home is a convenient alternative with the same trusted technology as used in a doctor’s office.

At home, you or a caregiver draw a small blood sample with a simple fingerstick. The blood sample is analyzed by a handheld device in just a few minutes. You report the results, and your doctor will change your warfarin dosage as needed.

Take the assessment to learn if you're a good candidate for self-testing
Is INR Testing at home right for you? 

If you take warfarin and plan with your doctor to take it for 90 days or more, you could be a good candidate for monitoring your therapy at home. People who want to be in greater control of their warfarin therapy, and who follow their doctor's orders and prescription instructions also make good candidates for self-testing.

If you anwer yes to most of the questions on our self-testing assessment, you may be a good candidate for self-testing.

We offer self-pay options to qualified patients.



Geting-Started Checklist
Self-testing: Five easy steps
The quick-start guide to INR home testing.

Five simple steps will get you started testing your blood at home to monitor your warfarin therapy. 

Step 1

Your doctor sends in your patient information. Your doctor submits the Physician Order Form (your prescription) and Patient Authorization Form online to CoaguChek Patient Services.

Step 2

CoaguChek Patient Services confirms your coverage. We’ll contact your insurance company and provide you with estimated out-of-pocket costs.


Step 3

CoaguChek Patient Services schedules an in-person training by a certified healthcare professional or by your doctor's office staff. During training, you’ll learn the importance of testing as prescribed and how to:

• Use the meter
• Report your test results
• Order testing supplies

Step 4

We’ll collect and communicate all results and notify your doctor of out-of-range results.

Step 5

We also have a convenient program that helps keep you on your prescribed testing schedule and  reminds you if you miss reporting a result. 

CoaguChek Patient Services provides ongoing service and support. We provide testing supplies to you and have 24/7 technical support for the meter.

Does insurance cover self-testing?
Our experts help you determine out-of-pocket costs

The cost of self-testing will vary depending on your insurance coverage. (Coverage may vary based on your condition and other factors.)


1 Coverage/eligibility for this service may vary based on your condition and other factors, including your health plan benefits.

Talk to your healthcare provider
Say yes to self-testing. Ensure you get
the maximum benefit from warfarin. 

Whether you perform INR tests at home or you go into the doctor’s office, hospital or a medical lab, routine monitoring enables your doctor to adjust your warfarin dosage to better manage your risk of complications.

Take an active role by checking and reporting your INR as prescribed by your doctor, and make sure to share any relevant information about changes in your lifestyle that may affect your blood test results, such as:
•  Missed doses of warfarin
•  Changes in your diet
•  Alcohol intake
•  Stress
•  Herbal supplement you’re considering
•  New medications prescribed by other doctors

Ask your doctor how self-testing can help you stay on track.

Remember these facts about home INR testing when you go to your next doctor’s appointment:

•  Self-testing can enable you to test more consistently, which may improve your time in the target INR range set by your doctor.1,2
•  Self-testing is easy with a home monitor and a simple fingerstick to obtain your blood sample.
•  Self-testing can help you stay connected to your doctor, who quickly receives the results.
•  Home INR testing may be covered by Medicare and many major insurance providers.
   (Coverage may vary based on your condition and other factors.)


1  Kortke, H., Minami, K., Reymann, T., et al., (2001). “INR self-management after mechanical heart valve replacement: ESCAT (Early Self-Controlled Anticoagulation Trial).” Z Kardiol 90(6)118-124.
2  Heneghan CJ, et. al. Self-monitoring and self-management of oral anticoagulation. Cochrane Database of Systematic Reviews2016, Issue 7. Art. No.: CD003839. DOI: 10.1002/14651858.CD003839.pub3.

Frequently asked questions about self-testing

Frequently asked questions about self-testing

Checking your INR at home offers you:


Check your own INR at home per your doctor’s prescribed test frequency on your own schedule, and never worry about missing a test.


Use the same CoaguChek XS technology your doctor most likely uses to ensure results that are just as accurate as an in-office test.

More time in your target range 

Self-monitoring per your doctor’s prescribed test frequency allows your doctor to make timely dosage adjustments, which may result in more time in range.1

Peace of mind 

Being able to test where and when you need to enables you to test as prescribed, which may help you stay in therapeutic range longer.1

If you have a mechanical heart valve, chronic atrial fibrillation or venous thromboembolism, and you’re on long-term warfarin therapy, Medicare Part B may cover meter training, services, equipment and supplies for monitoring your INR at home with a portable handheld meter.2 Most private insurance companies also cover INR self-testing.3 Individual plans vary, so it’s important to talk to your provider to find out if you’re covered. (Coverage varies based on your condition and other factors.)

The CoaguChek Vantus meter and home testing must be prescribed by your doctor. Only you and your doctor can decide if home monitoring is right for you. Be sure to discuss testing options with your doctor. Read our Get Started Guide to learn more about how to start home testing.

It’s easy, thanks to our certified training. A certified healthcare professional will sit down with you at home or in your doctor’s office to provide step-by-step instructions for running a test and reporting the results.

We offer you four easy ways to record your INR results. Choose the one that is best for you:

Secure patient website CoaguChek Link 

1. Intuitive and secure, our website enables you to easily record your latest INR results. 

2. You can also review any changes to your warfarin dosing schedule, and access your previous INR results.

Automated phone system

1. Report your results 24 hours a day.

2. Never have to wait on hold to report your results.

3. You can even use our automated system to: 

a. Reorder testing supplies

b. Check your previous results 

c. Update insurance information

CoaguChek XS mPOC Kit

1. Wirelessly transmit results from your meter directly to CoaguChek Patient Services.

2. The kit comes with a SmartClip that attaches to your CoaguChek XS meter.

3. The SmartClip works with our iOS app (available from the Apple® App Store®), or the 2net™ Hub transmitter, to transmit your results to CoaguChek Patient Services, which makes themavailable to your healthcare provider.4 

4. mPOC requires cellular connectivity 2net™ Hub transmitter works only in the United States and requires a reliable cellular connection.

Live phone support

Call our toll-free number, 1-800-780-0675

Talk directly with our knowledgeable CoaguChek Patient Services staff. We’re here to help answer all your questions and will communicate directly with your doctor.

If your testing device is not working properly and our telephone technical support staff is unable to resolve the issue with you, we ship a new device to replace your defective device at no additional cost to you.

Don’t worry – self-testing is quite different from veinous draw. Instead of drawing blood from a vein in the bend of your elbow, you simply stick a finger with a specially designed device. Once a small drop of blood appears, you apply it to a disposable test strip inserted into an easy-to-use, handheld CoaguChek meter. In approximately one minute, you have a result. Most people who try self-testing prefer it to lab testing.5

Getting a blood sample takes just a small fingerstick. A specially designed lancing device, which is about the size of a pen, quickly inserts a tiny needle and pulls it out again. You can even set the lancing device to go no deeper than necessary. Most people who try self-testing prefer it to lab testing.5

Try these tips:

•  Warm your hand by holding it under your arm.

•  Use a hand warmer.

•  Wash your hands in warm, soapy water, and then rinse and dry thoroughly before testing.

•  Gently shake your arm down at your side for about 30 seconds.

•  Watch this video to learn how easy it is.

For your convenience, your supplies will automatically be delivered to your door with quantities based upon your testing frequency.

• Contained within each shipment you will find 2 boxes of testing strips, and 1 box of lancets which will provide adequate testing supplies for up to 12 tests.

• Your initial training will include everything you need to get started, and your continuation of supplies will automatically be delivered shortly thereafter.

• If you should need additional supplies while waiting for your automated order please visit us online. You may also contact Customer Service at 1-800-780-0675, who is available Monday through Friday from 8 AM to 6 PM EST to support your continued enjoyment of our service.  

One of our CoaguChek Patient Services representatives is available to answer your questions, including helping you find out what expenses are covered by Medicare or your private insurance. Call us at 1-800-780-0675 from 8:30 a.m. to 8:30 p.m. ET.


1  Kortke, H., Minami, K., Reymann, T., et al., (2001). “INR self-management after mechanical heart valve replacement: ESCAT (Early Self-Controlled Anticoagulation Trial).” Z Kardiol 90(6)118-124.
2  Centers for Medicare and Medicaid Services, National Coverage Determination (NCD) for Home Prothrombin Time/International Normalized Ratio (PT/INR) Monitoring for Anticoagulation Management (190.11), (accessed January 2018)
3  Coverage varies by plan.
4  The CoaguChek® Vantus system may be used up to a maximum altitude of 13,120 feet. 
5  Gardiner, C., Williams, K., Mackie, I.J., Machin, S.J., Cohen, H. (2004). “Patient self-testing is a reliable and acceptable alternative to laboratory INR monitoring.” British Journal of Haematology 128;242-247.