What Medicare Covers for FreeStyle Libre Glucose Monitors

Medicare's Coverage of FreeStyle Libre

Medicare Part B covers the FreeStyle Libre continuous glucose monitor (CGM) for people with diabetes who meet specific requirements. The amount Medicare pays depends on whether you have traditional Medicare (Part A and B) or a Medicare Advantage plan, and it varies based on the specific model and your supplier.

For the standard FreeStyle Libre 2, Medicare typically covers 80 percent of the approved amount after you meet your Part B deductible. You pay the remaining 20 percent coinsurance. The actual dollar amount Medicare pays varies by region and supplier, ranging roughly between $50 and $80 per sensor in most areas, though this is not fixed nationally.

Medicare Advantage plans (Part C) may cover FreeStyle Libre differently — some cover it at the same rate as traditional Medicare, while others require prior authorization or have different cost-sharing. You need to check your specific plan's coverage details before ordering.

Key Takeaways

Medicare Part B covers FreeStyle Libre for people with diabetes who use insulin or certain other medications, after meeting the Part B deductible.
Medicare pays approximately 80 percent of the approved amount per sensor, leaving you responsible for 20 percent coinsurance.
You must order through a Medicare-approved supplier, and the supplier must have a valid billing agreement with Medicare.
Medicare Advantage plans have their own coverage rules, so you must contact your plan directly to confirm what you will pay.
Prior authorization from your doctor is required before Medicare will pay, and your doctor must document that you meet medical necessity criteria.

Who Qualifies for Medicare Coverage

Medicare covers FreeStyle Libre only for people with diabetes who meet one of two conditions: you must use insulin at least once daily, or you must use a medication that increases the risk of low blood sugar (such as certain sulfonylureas or meglitinides). If you have type 2 diabetes and manage it with diet or oral medications alone, Medicare will not cover the device.

Your doctor must document that you have diabetes and that you meet one of these medication requirements. The documentation goes to Medicare through your supplier as part of the prior authorization process. If your doctor believes you need the device for a different reason, they can request an exception, but Medicare will likely deny it unless the medical reason falls within their coverage rules.

Age is not a barrier — Medicare covers FreeStyle Libre for people 65 and older and for some younger people with disabilities or end-stage renal disease who have Medicare.

What You Pay Out of Pocket

Your out-of-pocket cost depends on whether you have met your Part B deductible for the year. Once you meet the deductible (which is $226 in 2024, though this amount changes annually), you pay 20 percent of Medicare's approved amount for each sensor. If you have not met your deductible, you pay the full deductible first, then 20 percent coinsurance.

The approved amount varies by region and supplier. In most areas, Medicare's approved amount per sensor is between $50 and $80, meaning your 20 percent coinsurance is roughly $10 to $16 per sensor. Since FreeStyle Libre sensors last 14 days, you would need approximately 26 sensors per year, putting annual coinsurance between $260 and $416 for most people.

If you have a Medigap or other supplemental insurance plan, it may cover some or all of your coinsurance. Check your supplemental plan's coverage details.

How to Order Through Medicare

You cannot order FreeStyle Libre directly from Abbott (the manufacturer) and have Medicare pay. You must order through a Medicare-approved Durable Medical Equipment (DME) supplier. Your doctor writes a prescription for the device, and you contact a DME supplier to place the order.

The supplier handles the prior authorization request to Medicare on your behalf. This means the supplier submits your doctor's documentation showing you have diabetes and use insulin or a may have access to medication. Medicare reviews this and sends approval (or denial) to the supplier, usually within 5 to 10 business days.

Once approved, the supplier ships the sensors to you. You do not pay the supplier directly for Medicare-covered items — instead, Medicare pays the supplier, and you pay your coinsurance amount. Some suppliers may ask you to pay upfront and then seek reimbursement from Medicare, so confirm the payment process before ordering.

Finding a Medicare-Approved Supplier

You can find Medicare-approved DME suppliers through the Medicare Supplier Directory on the Centers for Medicare & Medicaid Services (CMS) website. Search by your ZIP code and filter for suppliers that carry continuous glucose monitors or FreeStyle Libre specifically.

Not all suppliers carry all brands or models. Call ahead to confirm the supplier stocks FreeStyle Libre and accepts Medicare. Ask whether they handle prior authorization, how long delivery typically takes, and what happens if Medicare denies the request.

Some suppliers are national (such as Byram Healthcare or Edgepark), while others are regional or local. National suppliers often have faster processing, but local suppliers may offer better customer service. You can use any approved supplier — you are not limited to one.

Medicare Advantage Plan Coverage

If you have a Medicare Advantage plan (Part C), your coverage of FreeStyle Libre is determined by your specific plan, not by Medicare Part B rules. Some plans cover it identically to traditional Medicare, while others may require prior authorization, limit the number of sensors per year, or charge different coinsurance amounts.

Contact your Medicare Advantage plan's customer service line and ask specifically about FreeStyle Libre coverage. Ask whether prior authorization is required, what your coinsurance will be, and which suppliers are in-network. Using an out-of-network supplier may result in higher costs or no coverage.

If your plan denies coverage or limits it in a way you believe is medically inappropriate, you have the right to request an appeal. Your doctor can support the appeal by submitting additional medical documentation.

Common Reasons Medicare Denies Coverage

Medicare denies FreeStyle Libre coverage most often because the person does not use insulin or a may have access to medication. If your doctor prescribed it for type 2 diabetes managed with oral medications alone, Medicare will deny it. The only way around this is if your doctor can document a medical exception — for example, if you have severe hypoglycemia unawareness despite oral medication management — but exceptions are rarely approved.

Coverage is also denied if the prior authorization request lacks sufficient documentation. Your doctor must explicitly state that you have diabetes and that you use insulin or a may have access to medication. A vague prescription is not enough. If this happens, ask your doctor to resubmit with clearer documentation, and the supplier can resubmit the prior authorization request.

Some people are denied because they ordered through a supplier that is not Medicare-approved or because the supplier did not submit prior authorization before shipping. Always confirm the supplier is on the Medicare Supplier Directory and that they will handle prior authorization before you place an order.

Frequently Asked Questions

Does Medicare cover the FreeStyle Libre 3?

Medicare coverage of FreeStyle Libre 3 is still being determined. As of early 2024, Medicare has not yet issued a national coverage information for the newer model. Check with your supplier or call Medicare at 1-800-MEDICARE to learn the current status. Some Medicare Advantage plans may cover it, but coverage varies by plan.

What if I use a continuous glucose monitor from a different brand?

Medicare covers other CGMs, including Dexcom and Medtronic Guardian, under the same rules as FreeStyle Libre. Coverage, prior authorization requirements, and your out-of-pocket costs may differ by brand and model. Ask your doctor which option Medicare covers in your area and what your costs would be for each.

Can I get FreeStyle Libre sensors more frequently than once every 14 days?

Medicare covers one sensor every 14 days, which is the standard wear time. If you need to replace a sensor early due to malfunction, contact the supplier or Abbott directly — they may replace it at no cost under warranty. Medicare will not pay for extra sensors beyond the standard schedule.

Do I need prior authorization every time I reorder sensors?

No. Once Medicare approves FreeStyle Libre, your supplier can reorder sensors without submitting prior authorization again, usually for up to one year. After one year, your doctor may need to resubmit documentation to confirm you still meet coverage criteria. Ask your supplier about their reorder process.

What happens if my Medicare Advantage plan covers FreeStyle Libre differently than traditional Medicare?

Your plan's coverage rules explore instead of traditional Medicare rules. If your plan charges more coinsurance, requires prior authorization, or limits the number of sensors, you follow your plan's rules. If you disagree with your plan's decision, you can file an appeal with your plan and ask your doctor to provide supporting documentation.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.