Medicare's coverage of Freestyle Libre 3 depends on which part of Medicare you have and whether your doctor prescribes it as medically necessary

Medicare Part B covers Freestyle Libre 3 for people with diabetes who meet specific requirements. Your doctor must prescribe it, and you must have diabetes that requires insulin or certain other medications. Part B typically covers the sensor itself, though you will pay 20 percent of the approved amount after you meet your deductible. The exact coverage amount varies based on what Medicare's approved payment is in your area.

Medicare Part D (prescription drug coverage) does not cover Freestyle Libre 3 because it is classified as durable medical equipment, not a prescription drug. If your plan includes Part B coverage, that is where the sensor is covered.

If you have a Medicare Advantage plan (Part C), coverage varies by plan. Some plans cover Freestyle Libre 3 under their medical equipment benefit, while others do not. You will need to check your specific plan's formulary or call the plan directly to find out whether it is covered and what your out-of-pocket cost would be.

Key Takeaways

  • Medicare Part B covers Freestyle Libre 3 if your doctor prescribes it and you have diabetes requiring insulin or certain medications.
  • You pay 20 percent of Medicare's approved amount after meeting your Part B deductible; the exact cost depends on your region.
  • Medicare Advantage plans have different coverage rules, so you must contact your specific plan to learn what you would pay.
  • Medicare Part D does not cover Freestyle Libre 3 because it is classified as medical equipment, not a prescription drug.

What your doctor needs to document for Medicare to cover it

Medicare requires your doctor to document that you have diabetes and that you use insulin or take certain other medications to manage your blood sugar. The prescription itself is not enough—your doctor's notes must show the medical reason why continuous glucose monitoring is necessary for your care. This documentation is called a Certificate of Medical Necessity (CMN), and the supplier you order from will usually provide the form for your doctor to complete.

Your doctor does not need to try other glucose monitors first. However, Medicare does require that the supplier verify your coverage before sending you the sensor. This verification step protects you from unexpected bills if it turns out Medicare will not cover your specific situation.

How to find out what your plan covers

If you have Original Medicare (Part A and Part B), call Medicare directly at 1-800-MEDICARE to confirm that Freestyle Libre 3 is covered under your Part B benefits. Have your Medicare number ready. You can also visit Medicare.gov and search for "durable medical equipment" to see the general coverage rules.

If you have a Medicare Advantage plan, call the customer service number on the back of your insurance card. Ask whether Freestyle Libre 3 is covered as durable medical equipment and what your copay or coinsurance would be. Plans change their coverage each year, so even if you had it covered last year, you should verify for the current year.

Once you know your coverage, you can order Freestyle Libre 3 from a Medicare-approved supplier. The supplier will verify your coverage with Medicare or your plan before shipping the sensor to you. This verification is free and takes a few business days.

What happens if your plan does not cover it

If Medicare Part B does not cover Freestyle Libre 3 for you, or if your Medicare Advantage plan excludes it, you have a few options. You can purchase the sensor out of pocket—a 14-day sensor typically costs between $60 and $100 per sensor, depending on where you buy it. Some people use a combination approach: they use Freestyle Libre 3 when they can afford it and switch to finger-stick testing or an older glucose monitor when they cannot.

Abbott, the manufacturer of Freestyle Libre 3, offers a patient information program for people without insurance or whose insurance does not cover the cost. You can learn about this program by calling 1-844-FREESTYLE or visiting the Abbott website. Income limits explore, and the program is not the same as insurance coverage.

How coverage works if you switch plans mid-year

If you change from Original Medicare to a Medicare Advantage plan, or from one Advantage plan to another, your coverage for Freestyle Libre 3 may change. The change takes effect on the first day of the month after your new coverage begins. If your old plan covered it and your new plan does not, you may have a gap in coverage. Contact your new plan before your coverage switches to understand what you will pay going forward.

If you are in the middle of a 14-day sensor cycle when your coverage changes, your old plan typically covers that sensor through the end of its wear period. Your new plan's coverage begins with your next sensor.

Comparing Freestyle Libre 3 to other continuous glucose monitors Medicare covers

Medicare also covers other continuous glucose monitors, including Dexcom G6 and Medtronic Guardian. Coverage rules are similar across all of them: your doctor must prescribe it, you must have diabetes requiring insulin or certain medications, and you pay 20 percent of the approved amount under Part B. The main differences are in how often you change the sensor, how long it lasts, and whether it requires fingerstick calibration.

Freestyle Libre 3 lasts 14 days and does not require fingerstick calibration. Dexcom G6 also lasts 10 days and does not require calibration. Medtronic Guardian lasts 7 days and requires calibration. Your doctor can help you decide which one fits your lifestyle best, and Medicare will cover whichever one your doctor prescribes, as long as you meet the basic requirements.

Frequently Asked Questions

Do I need to use a specific supplier to get Freestyle Libre 3 covered by Medicare?

No, but the supplier must be approved by Medicare. When you order, the supplier will verify your coverage with Medicare or your plan. If you use a non-approved supplier, Medicare will not cover the cost. Your doctor can recommend suppliers, or you can ask Abbott for a list of Medicare-approved distributors in your area.

Will Medicare cover replacement sensors if I damage one?

Medicare covers one sensor every 14 days as long as you continue to meet the coverage requirements. If you damage a sensor before 14 days have passed, you would typically need to pay out of pocket for a replacement. Some suppliers offer damage replacement programs, so ask when you order.

What if my doctor says I need Freestyle Libre 3 but Medicare says I do not meet the requirements?

You can ask your doctor to file an appeal with Medicare, explaining why continuous glucose monitoring is medically necessary for your specific situation. This is called a redetermination request. Your doctor submits it, and Medicare reviews it. The process usually takes 30 days. If Medicare denies it again, you can request a hearing.

Does my copay or coinsurance count toward my Part B deductible?

Yes. Your 20 percent coinsurance for Freestyle Libre 3 counts toward your annual Part B deductible. Once you reach your deductible, Medicare pays 80 percent of the approved amount and you pay 20 percent for the rest of the year.