As of May 7th, 2018, the new CPS Customer Service hours will be 8:00AM-6:00PM EST Monday-Friday.

Patients will still be able to report their INR results to a live agent from 8AM-8PM.


We make self-testing simple for you

From around-the-clock support for meters to certified training, find everything you need to make self-testing simple, safe and convenient with CoaguChek Patient Services. Get the support you need to stay on track with us. We’re here to help make self-testing the right fit for your life.


you and coaguchek patient services


We are here for you

CoaguChek Patient Services was created especially to help you enjoy the freedom of testing your PT/INR, or INR, from home. Think of us as your partner in self-testing.



Enrolling is easy! Just call us at 1-800-780-0675. We'll contact your healthcare provider to start your enrollment.





1  CoaguChek Patient Services 2017 Patient Satisfaction Survey. Compiled from 983 responses. Data on file.

2  The CoaguChek Vantus system may be used up to a maximum of 13,120 feet.


patient resources


Looking for something? We’re here to help. 

Access forms, browse our Frequently Asked Questions (FAQs) page for answers to common inquiries or peruse back issues of the CoaguChek Patient Services newsletter, At Home, for even more information and resources.




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frequently asked questions about coaguchek patient services
CoaguChek Patient Why Test FAQ Icon

What is coagulation?

Coagulation is the formation of blood clots inside the body. Proteins in the blood, called fibrins, and small elements in the blood, called platelets, work together to form a clot, which helps stop bleeding when you have a cut or injury.

What are anticoagulants?

Oral anticoagulants (blood thinners) such as warfarin or Coumadin® are drugs that help thin the blood of patients with conditions such as atrial fibrillation, thrombophilia and other diseases that increase the risk of forming blood clots. Patients taking warfarin have to sometimes make a lifelong commitment to this medication to avoid complications such as stroke or pulmonary embolism (blockage in the main lung artery).

These drugs are called vitamin K antagonists, and each patient reacts to them differently. There are also external factors that could interfere with the medication, including certain foods, stress and alcohol. That is why it is so important for anticoagulation patients to test according to a prescribed testing frequency.1

Why do I need warfarin?

For some people, blood clots form too easily or they don’t dissolve properly. These clots can impede blood flowing through the body, potentially leading to heart attack or stroke.2 Anticoagulation medication, such as Coumadin® or another brand of warfarin, slows down the clotting process to help keep you in a safe range.

What is PT/INR?

PT stands for “prothrombin time,” or the time it takes for blood to clot. INR is short for “international normalized ratio.” This is a calculation for standardizing results from PT tests. Essentially, PT/INR is a measure of whether your blood is clotting at a safe rate. You may see this referred to as PT monitoring, INR monitoring, or PT/INR.

What are the benefits of self-testing?

Checking your INR at home offers you:


Check your own INR at home per your doctor’s prescriped 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.3,10

Peace of mind

Being able to test where and when you need to enables you to test as prescribed.

Is an at-home meter as accurate as a lab test?

When you test at home with a CoaguChek XS meter, you’re most likely using the same device most doctors use in their offices. A study has shown that the CoaguChek XS meter provides consistent results (97% correlation), whether through self-testing by trained users, or when the test is performed by a healthcare professional.4 That means you can count on reliable results without making a trip to your doctor’s office.

Are the CoaguChek XS meter and supplies covered by insurance or Medicare?

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.5 Most private insurance companies also cover INR self-testing.6 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.)

What’s the target range for INR levels?

The goal of monitoring your warfarin dose is to remain in the target range recommended by your doctor. For most people, a result of 2.0 to 3.0 is appropriate, although those at higher risk of clotting may have a target range of 2.5 to 3.5.7 Talk to your doctor about the appropriate range for you.

What if my results are out of range?

If your INR is higher than the target range, blood clots may not form quickly enough, and you may experience bruising or be at increased risk of bleeding. If your PT/INR is too low, you may still be at risk of excessive clotting.7 Talk to your doctor about the appropriate range for you.

Is it easy to learn how to perform a self-test?

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.

What if I’m uncomfortable drawing my own blood sample?

Don’t worry – self-testing is quite different from lab testing. Instead of drawing blood from a vein in the bend of your elbow, you simply stick your finger with a specially designed device. Once a small drop of blood appears, you apply it to a disposable test strip inserted in an easy-to-use, handheld meter. In approximately one minute, you have the result. Most people who try self-testing prefer it to lab testing.8

Does it hurt to get a blood sample?

Getting a blood sample takes just a small fingerstick. A specially designed lancing device, which looks like 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.8

How can I make it easier to get a drop of blood?

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.

What can affect my INR level?

Many things can alter your INR, including stress, missing a warfarin dose, taking herbal supplements and other medications, and consuming certain foods and beverages, such as kale and cranberry juice.9

Can I drink alcohol while taking warfarin/Coumadin®?

Alcohol can increase the effect of warfarin and further slow your clotting rate, causing your INR to be too high. You may want to avoid it while on warfarin.10

What’s the importance of vitamin K?

Warfarin works by blocking the body’s ability to use vitamin K, a necessary component in the formation of blood clots. When you’re taking warfarin, it’s important to keep the amount of vitamin K in your diet consistent, or it may impact the effectiveness of your warfarin dose.9

What foods are high in vitamin K?

Green vegetables such as spinach, kale and broccoli are high in vitamin K,9 as are the following foods:

• Tuna

• Prunes

• Green tea

• Beef and chicken liver

• Liverwurst

• Blueberries and blackberries 

How often should I test?

Test frequency should be determined by your healthcare provider.  

How do I report test results to my doctor?

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 transmits 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 them available to your healthcare provider.11

4. Internet availability is required for wireless reporting.  

5. 2net(TM) Hub transmitter works only in the United States and requires a reliable cellular connection.

Live phone support

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

a. 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.

Where can I order testing supplies?

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 at 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.  

What should I do with my used lancets?

Lancets are considered “medical sharps” and must be disposed of properly so they don’t injure sanitation workers and others. Guidelines vary by state, and many areas have collection programs for these items. Please visit the Coalition for Safe Community Needle Disposal site to find out what’s required in your state.

What health conditions require INR testing?

Any condition that results in an increased risk for blood clots and is treated with warfarin (sometimes known as Coumadin® or other brand names) will require regular testing. These include:

• Atrial fibrillation – The most common type of arrhythmia or irregular heartbeat.

• Venous thromboembolism (VTE) – Involving blood clots in the veins of the legs or the lungs; includes deep vein thrombosis (DVT) and pulmonary embolism (PE).

• Mechanical heart valves – Implantable devices, especially those with manmade surfaces, can cause blood clots to form.

• Thrombophilia – An increased tendency to form abnormal blood clots.

How can patients ensure they are getting a factory-new INR meter?

As the recognized leader in providing safe, accurate INR testing technology, Roche does not allow CoaguChek XS meters used for patient self-testing to be refurbished. 

Why is this important?

Re-use of improperly cleaned medical devices may be associated with multiple safety risks to patients, although insufficient data is available to definitely assess the risk of using refurbished medical devices.12 There’s no way to monitor or know the way meters previously used by patients for self-testing have been handled, cleaned, or stored.


1 Coumadin® (warfarin sodium) package insert revised October 2011.

2 American Heart Association, “What is excessive blood clotting (hypercoagulation)?” (accessed January 2018).

3 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.

4 Roche Diagnostics. Indianapolis, Ind. (2016). 97% correlation with lab results using Dade Innovin reagent. See package insert for more information. CoaguChek® XS PT Test [package insert 05967694001(05)]. 

5 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).

6 Coverage varies by plan.

7 American Heart Association. “A patient’s guide to taking warfarin,” (accessed January 2018).

8 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.

9 Blood Thinner Pills: Your Guide to Using Them Safely. Agency for Healthcare Research and Quality, Rockville, MD. September 2015. Available at (Accessed January 2018.)

10 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.

11 The CoaguChek® Vantus system may be used up to a maximum altitude of 13,120 feet.

12 Association for the Advancement of Medical Instrumentation. Technical Information Report: A compendium of processes, materials, test methods, and acceptance criteria for cleaning reusable medical devices. 2011.