What warfarin costs if you have no insurance

What warfarin is for

MedlinePlus, a health site from the National Library of Medicine, says warfarin is a blood thinner. It is used to prevent and treat blood clots. It also helps prevent problems in people with certain irregular heartbeats and people with replacement heart valves. People who have had a heart attack or a stroke may take it too. Warfarin comes as a tablet that you take by mouth once a day.

What the tablets cost

We found no government list of counter prices for warfarin. The closest real numbers come from Medicare, the federal health plan for people 65 and older and some younger people with disabilities. Its Part D plans are the ones that pay for prescriptions. The Centers for Medicare and Medicaid Services reports what those plans and their members spent in total on each drug.

For generic warfarin in 2024, that spending averaged about $9.37 per prescription fill. The report counted more than 4.6 million fills made by ten different drug makers. The average fill held about 70 tablets, so the cost came to roughly 14 cents a tablet. This is not a cash price, but it shows how low the cost of the medicine is.

A second number comes from the national drug cost survey that Medicaid runs. It tracks what pharmacies pay to buy a drug, which is lower than the price on your receipt. In the week of October 21, 2026, pharmacies paid about 9 cents for a 5 mg tablet. They paid about 10 to 11 cents for most other strengths. Warfarin comes in nine strengths from 1 mg to 10 mg, and every one of them fell between 9 and 11 cents. At that rate, a 30-day supply of 5 mg tablets costs a pharmacy about $2.67. The survey lists warfarin only as a generic medicine, so we found no brand-name version to compare.

Your price at the counter will be higher, and it differs from store to store. A few phone calls can show a wide gap. Our guide on how to compare prescription prices shows what to ask.

When you call a pharmacy, have your prescription in front of you. Give the strength, the number of tablets and the number of days the supply must last. Ask for the cash price for exactly that fill, and ask whether the price changes if you fill a different number of tablets. Write down each answer so you can compare stores later.

The blood tests can cost more than the pills

MedlinePlus says your doctor will order a regular blood test to check how your body responds to warfarin. The test is called a prothrombin time test, and the result is reported as an INR. INR stands for international normalized ratio, a number that shows how fast your blood clots. Your doctor decides how often you need it, and you pay for the lab test and often for a visit as well.

For comparison, Medicare pays about $4.29 to a lab for a prothrombin time test in 2026, and about $9.34 for drawing the blood. Both are Medicare amounts and not cash prices. A clinic or lab that charges you cash may charge more or less, so ask for a price before you go. Our guide on lab tests without insurance explains how lab pricing works.

A cash-pay doctor with a monthly membership can order the test, review the result and renew the prescription for a known fee. Direct primary care usually costs $50 to $200 a month, and you can search for a cash-pay doctor near you.

Ways to lower the cost

Warfarin is a generic medicine, and we found no drug maker program that sells it directly to patients. The best savings come from comparing pharmacies, and a community health center is another option.

The Health Resources and Services Administration, or HRSA, says health centers charge on a sliding scale. That means the fee depends on your income and family size. It also says they can buy outpatient drugs at reduced prices through a federal program called 340B. HRSA does not say how much of that savings reaches patients, so ask the center what it charges. Our guide on community health centers shows how to find one.

Please do not stop warfarin because of cost

MedlinePlus says to keep taking warfarin even if you feel well. It says not to stop without talking to your doctor. It adds that the effects of the medicine can last 2 to 5 days after you stop. If the price is a problem, please call your doctor or pharmacist before you run out and say that cost is the reason.

Other blood thinners exist, and some cost far more. As an example, our guide on apixaban costs shows that pharmacies paid about $331 for 60 tablets in October 2026. Which medicine is safe for you depends on your health, your other medicines and why you take a blood thinner. That choice belongs to you and your doctor, and this page cannot tell you which one to take. Our overview of blood thinner costs lists the other options.

Warning signs that need care right away

MedlinePlus warns that warfarin may cause serious bleeding. It says to call your doctor right away for bleeding that will not stop, nosebleeds or bleeding gums. The same goes for easy bruising, red or black stools, and coughing or throwing up blood. It also says to call if you fall and get hurt, especially if you hit your head.

In an emergency, such as chest pain, trouble breathing or bleeding that will not stop, call 911 or go to the nearest emergency room. Tell the staff that you take a blood thinner. Emergency rooms must see you whether or not you have insurance. This page gives general information and is not medical advice.