Warfarin (Coumadin) Medicare Coverage

Chemical name: Warfarin

Brand name: Coumadin, Jantoven

Typical dosage: 5mg

Typical type: Tablet1

Warfarin is a medication used to prevent or treat blood clots. Warfarin is available as a brand name or generic and comes as an oral tablet.

Warfarin is the generic form of the brand name medications called Coumadin and Jantoven.

Warfarin is a blood thinner medication used to prevent or treat blood clots related to heart attack, stroke, atrial fibrillation or cardiac valve replacement.

The dose of Warfarin you take depends on many different factors and should be taken at roughly the same time of day, every day. Warfarin blocks vitamin K in the body, which reduces how much your blood clots.

Warfarin is usually well tolerated, but common side effects include minor bleeding like nosebleeds or bleeding in the gums.

Does Medicare cover Warfarin or Coumadin?

Yes! 100% of Medicare Advantage plans and Medicare Part D plans cover Warfarin.1

  • Medicare Advantage plans that offer prescription drug coverage are called Medicare Advantage Prescription Drug Plans (MA-PD). Most Medicare Advantage beneficiaries (88 percent) are enrolled in MA-PDs.2

  • Medicare prescription drugs plans each have their own formulary, or drug list, that details what prescription drugs are covered by the plan and how they are covered.

Drug coverage may vary based on plan availability. You may be able to find Medicare Advantage plan options in your area that cover Warfarin.

Find Medicare Advantage plans with drug coverage

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Or call TTY Users: 711 24/7 to speak with a licensed insurance agent.


You can also compare Part D prescription drug plans available where you live and enroll in a Medicare prescription drug plan online when you visit MyRxPlans.com.

Average costs for Warfarin with Medicare drug coverage1

Your copay and deductible costs for any prescription drug can vary depending on what coverage stage you’re in.

Deductible stage Typical copay stage
Your deductible is the amount of money you must spend on covered drugs before your Medicare drug coverage starts paying its share of costs.

In the deductible stage, you’re responsible for the full cost of your prescription drugs.

Some Medicare prescription drug plans have a $0 deductible. Medicare drug plans cannot have a deductible more than $415 in 2019.
After you meet your Part D deductible, you enter the initial coverage period.

During this phase (the typical copay stage), you pay a copayment (flat fee) or coinsurance (percentage) for your covered medications.
Free – $15 Free – $15

Additional information

It is very important to closely follow the instructions your doctor has given you for taking Warfarin. It is important to keep taking Warfarin even if you feel well.

Try to take this drug at the same time of day, and try not to miss doses.

Warfarin interacts with many drugs you can buy over the counter, including ibuprofen, aspirin, vitamins, dietary supplements and even herbal supplements. Talk to your doctor or pharmacist before starting any new medications to make sure they are safe to take alongside Warfarin.

Warfarin can also interact with foods containing vitamin K. Foods with high amounts of vitamin K include green leafy vegetables, Brussels sprouts, broccoli, cauliflower, cabbage, fish, meat, eggs and more.

You do not have to avoid foods with vitamin K while taking Warfarin, but you should keep your weekly intake of vitamin K consistent.

Too much Warfarin can cause bleeding. Call your doctor if you experience signs of bleeding. If you fall and hit your head, call your doctor or go to the hospital to be checked out for any internal bleeding, even if you feel fine.



This article is for informational purposes only. It is not healthcare advice, treatment, or diagnosis. It is not an endorsement of or recommendation for this medication. Speak to your doctor or healthcare provider about your specific healthcare needs, including your prescription medications. Only take medication as directed by your doctor.

Coverage and costs of prescription medications will vary by Medicare plan. Not all plans are available in all areas.


Written by Hayden Gharibyar, Pharm.D.