Medicare Part B Coverage for FreeStyle Libre 2

Medicare Part B covers the FreeStyle Libre 2 continuous glucose monitor (CGM) for people with diabetes who meet specific requirements. The device itself and the sensors are covered, but only if your doctor prescribes it and you have the right type of diabetes diagnosis. Part B treats the Libre 2 as durable medical equipment, which means Medicare pays 80 percent of the approved amount after you meet your Part B deductible — you pay the remaining 20 percent.

Coverage is not automatic. Your doctor must document that you have diabetes and are using insulin, and the prescription must come through as a written order. Medicare also requires that you use a specific pharmacy or supplier on their approved list. If you go to an unapproved supplier, Medicare will not pay, and you will owe the full cost.

The sensors themselves — the small patches you wear on your arm — are covered as replacement supplies. Medicare covers a new sensor every 14 days, which aligns with how long each FreeStyle Libre 2 sensor lasts. The reader device (the small handheld scanner) is also covered, though you typically only need one.

Key Takeaways

  • Medicare Part B covers the FreeStyle Libre 2 reader and sensors only if your doctor prescribes it and documents that you use insulin for diabetes.
  • You must order through a Medicare-approved supplier; ordering from other sources means Medicare will not pay.
  • Medicare pays 80 percent of the approved amount after your Part B deductible; you pay 20 percent coinsurance.
  • Sensors are covered as replacement supplies at one sensor every 14 days, matching the device's actual wear schedule.
  • Your doctor's prescription must be a written order, not just a verbal recommendation, for Medicare to process the claim.

Who Qualifies for Coverage

Medicare Part B will only cover the FreeStyle Libre 2 if you have a diagnosis of diabetes and use insulin. This is the core requirement. If you manage your diabetes with oral medications alone (pills), Medicare does not cover the Libre 2. The logic is that continuous glucose monitoring is most useful for people adjusting insulin doses, and Medicare limits coverage to that population.

Your doctor must document your insulin use in your medical record and include it in the prescription. Medicare reviewers check this before approving payment. If your records show you stopped using insulin or never used it, the claim will be denied, and you will receive a bill for the full cost.

There is no age limit. Medicare covers the Libre 2 for people on Medicare at any age, including those under 65 who may have access to for Medicare due to disability or end-stage renal disease.

How to Order Through a Medicare-Approved Supplier

The first step is to get a written prescription from your doctor. The prescription should state that you have diabetes, use insulin, and need a continuous glucose monitor. Your doctor's office can fax or mail this directly to a supplier, or they can give you a copy to send yourself.

Next, contact a Medicare-approved supplier. You can find these by visiting Medicare.gov and using their Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) supplier locator, or by calling 1-800-MEDICARE. Abbott, the manufacturer of FreeStyle Libre, also maintains a list of approved suppliers on their website. Call the supplier and provide your Medicare number, prescription, and doctor's contact information.

The supplier will verify your coverage with Medicare before shipping anything. This step prevents surprises — if there is a problem with your prescription or your coverage, you will find out now rather than after receiving the device. Once verified, the supplier ships the reader and your first sensor directly to your home. Replacement sensors arrive on a schedule you set up with the supplier.

What You Pay Out of Pocket

Your cost depends on whether you have met your Part B deductible for the year. The Part B deductible for 2024 is $240 (this amount changes yearly). Once you meet the deductible, Medicare pays 80 percent of the approved amount, and you pay 20 percent coinsurance.

The approved amount varies by supplier and region, but Medicare typically approves around $100 to $150 per sensor. If Medicare approves $120 per sensor and you have met your deductible, you pay $24 per sensor (20 percent), and Medicare pays $96. Since you need a new sensor every 14 days, that is roughly $96 out of pocket per month in coinsurance.

If you have not met your deductible, you pay the full approved amount until you reach $240, then coinsurance kicks in. Some people reach their deductible quickly with other medical expenses; others may not reach it until later in the year.

If you have a Medigap or Medicare Advantage plan, your out-of-pocket costs may be lower. Medigap plans often cover the 20 percent coinsurance. Medicare Advantage plans vary — some cover the Libre 2 with little or no cost-sharing, while others charge copays. Check your plan documents or call your plan's customer service line to confirm your coverage.

Common Reasons Claims Are Denied

The most frequent denial is ordering from an unapproved supplier. If you buy the Libre 2 directly from a pharmacy, a retail store, or even from Abbott's website without going through a Medicare-approved supplier, Medicare will not pay. You will owe the full retail price, which is typically $300 to $400 per sensor. Always verify the supplier is on Medicare's approved list before placing an order.

Another common reason is missing or incomplete documentation of insulin use. If your doctor's prescription does not clearly state that you use insulin, or if your medical records do not support it, Medicare will deny the claim. Before your doctor sends the prescription, confirm that your chart shows your current insulin regimen.

Some claims are denied because the prescription is verbal rather than written. Medicare requires a written order. If your doctor only told you to get a Libre 2 but did not send a formal prescription to the supplier, the supplier cannot bill Medicare. Always ask your doctor to send a written prescription directly to the supplier or give you a signed copy.

What Happens if Your Claim Is Denied

If Medicare denies your claim, the supplier will send you a notice called an Explanation of Benefits (EOB). This notice explains why the claim was denied. Common reasons include missing documentation, ordering from an unapproved supplier, or a prescription that does not meet Medicare's requirements.

You have the right to appeal. The appeal process has several levels. First, you can ask the supplier to resubmit the claim with additional documentation — for example, a clearer statement from your doctor about your insulin use. If that does not work, you can file a formal appeal with Medicare. The appeal form is included with your EOB, or you can request one by calling 1-800-MEDICARE.

While an appeal is pending, you may need to pay out of pocket for sensors to keep using your device. Some suppliers will hold off billing you while an appeal is in progress, but this is not may provide. Ask the supplier about their policy before you start the appeal.

Medicare Advantage Plans and the Libre 2

If you are enrolled in a Medicare Advantage plan (Part C) instead of Original Medicare Part B, your coverage for the FreeStyle Libre 2 may be different. Some Medicare Advantage plans cover the Libre 2 with no cost-sharing, some charge a copay per sensor, and some do not cover it at all. You must check your specific plan's formulary or call the plan directly to find out.

Medicare Advantage plans are required to cover at least what Original Medicare covers, but many cover more. If your plan does not cover the Libre 2, you have the option to switch to Original Medicare during the Annual Enrollment Period (October 15 to December 7 each year). However, switching plans is a major decision with other trade-offs, so review your full coverage before deciding.

Frequently Asked Questions

Does Medicare cover the FreeStyle Libre 2 if I only take diabetes pills, not insulin?

No. Medicare Part B covers the Libre 2 only for people who use insulin. If you manage your diabetes with oral medications alone, Medicare will not cover the device. You would need to pay the full cost out of pocket, or explore whether your private insurance or a patient information program from Abbott offers coverage.

Can I use my FreeStyle Libre 2 prescription at any pharmacy?

No. You must use a Medicare-approved supplier. If you take your prescription to a regular pharmacy or order directly from a retailer, Medicare will not pay. Use the Medicare DMEPOS locator or call 1-800-MEDICARE to find an approved supplier near you.

How often does Medicare pay for new sensors?

Medicare covers one sensor every 14 days, which matches the lifespan of each FreeStyle Libre 2 sensor. You will receive roughly two sensors per month. If you need more frequent replacements due to sensor failure, talk to your supplier about how to request additional sensors and whether Medicare will cover them.

What if I have both Medicare and Medicaid?

If you have both Medicare and Medicaid (called "dual may be able to access"), Medicaid may cover costs that Medicare does not, including your coinsurance. However, coverage rules vary by state. Contact your state Medicaid office or your local Area Agency on Aging to learn what your state covers for the Libre 2.

Do I need a new prescription every year?

Your doctor's prescription does not expire automatically, but Medicare may require a new one if your treatment changes or if a certain amount of time has passed. Ask your supplier how often they need an updated prescription. Most suppliers will contact your doctor to renew the prescription when needed, so you do not have to manage this yourself.