Doctors prescribe anticoagulant drugs, or blood thinners, to treat or prevent blood clots. The anticoagulant warfarin requires a regular blood test called the international normalized ratio (INR). Your INR will tell us how long it takes for your blood to clot.

Because genetics, diet, and other medications can affect how anticoagulants work in the body, you will be closely monitored to avoid serious complications, such as bleeding. Your doctor may refer you to our anticoagulation clinic. The clinic is staffed by pharmacists who are trained to manage anticoagulant therapy. They will closely monitor and adjust your therapy and teach you how to stay safe while taking your anticoagulant.

You play an important role in ensuring the success of your anticoagulant therapy. Please ask if you have questions about your dose, blood testing schedule, or any other aspect of your care.

How Often Will I Visit the Clinic?

To schedule an appointment with the anticoagulation clinic, you must be referred by a physician.

The frequency of your visits depends on your INR results. Patients who are new to anticoagulation therapy may initially be seen once or twice per week. After your INR level becomes stable, you may only need to be tested once a month. Because diet, illness, and other medications can affect your body’s response to anticoagulants, there may be times when you are tested more frequently.


The anticoagulation clinic pharmacists work closely with your physician. Clinic services include:

  • Blood sample (taken from your arm) for INR testing
  • Anticoagulation medication adjustment
  • Close supervision of treatment for effectiveness
  • Monitoring for side effects
  • Educational materials and instruction
  • Screening and counseling about food and drug interactions

All of your clinic information is shared with your doctor.

Your Clinic Appointments

Please bring a complete medication list with you to every appointment, including all prescriptions, supplements, and over-the-counter and herbal medications. You should also bring your insurance card and photo identification.

Please allow one hour for your initial visit.

If you cannot keep your appointment, please call the clinic in advance so that we can help you reschedule and accommodate other patients.


Medicare, Medicaid, and private health insurance plans usually provide coverage for clinic services. Keep in mind that the terms of your policy will apply, including any deductible or coinsurance requirements. Please check with your health insurance plan to review your benefits for outpatient hospital services.


The outpatient anticoagulation clinic is located on the first floor of the Memorial Health Outpatient and Wellness Center on the campus of Memorial University Medical Center.

To reach the clinic, enter the Memorial Health campus through the main entrance at Waters Avenue and 63rd Street. You will be on Clark Drive. At the first stop sign, you will see the Memorial Health Outpatient and Wellness Center building on your right. There is a parking lot across the street from the building.