Can You Get Freestyle CGM Sensors Through Walgreens on Medicare Part B

Walgreens can dispense Freestyle CGM sensors that Medicare Part B covers, but only if your doctor writes the prescription and Medicare approves it first

Walgreens is a Medicare Part B provider for durable medical equipment, which includes continuous glucose monitors (CGMs) like the Freestyle Libre. However, Walgreens cannot sell you the sensors on Medicare Part B coverage without a prescription from your doctor and prior approval from Medicare. The pharmacy itself does not decide whether you are covered — Medicare does, based on your doctor's medical documentation and your specific diabetes type.

The process works like this: your doctor submits a prescription and supporting medical records to Medicare. Medicare reviews the request and either approves or denies it. If approved, you can then pick up the sensors at Walgreens (or another pharmacy) and pay your Part B coinsurance, usually 20 percent of the approved amount. If Medicare denies the request, Walgreens cannot override that decision, and you would need to pay the full retail price out of pocket or appeal Medicare's decision.

Key Takeaways

Walgreens can dispense Freestyle sensors covered by Medicare Part B, but only after your doctor submits a prescription and Medicare approves it.
Medicare Part B typically covers CGM sensors for people with type 1 diabetes or type 2 diabetes on insulin, with specific medical documentation required.
You will pay 20 percent coinsurance on the Medicare-approved amount, not the full retail price, once coverage is authorized.
If Medicare denies your request, you can ask your doctor to submit additional medical records or file a formal appeal within 180 days.

What Medicare Part B Covers for CGM Sensors

Medicare Part B covers continuous glucose monitors as durable medical equipment when your doctor documents that you have diabetes and meet specific clinical criteria. For the Freestyle Libre system, Medicare generally covers the sensors themselves but not the reader device in most cases. The sensors are covered if you have type 1 diabetes or type 2 diabetes and are on insulin therapy, and your doctor states that the CGM is medically necessary for your treatment.

The coverage amount varies depending on the specific sensor model and your Medicare plan. Medicare sets an approved amount for each sensor, and you pay 20 percent of that amount as coinsurance. The remaining 80 percent is covered by Medicare Part B. If you have a Medigap or Medicare Advantage plan, your coinsurance may be lower or covered entirely, depending on your plan's terms.

How to Get Freestyle Sensors Through Walgreens on Medicare Part B

Start by scheduling an appointment with your primary care doctor or endocrinologist and bringing documentation of your diabetes diagnosis and current insulin regimen. Tell your doctor you want to use a Freestyle CGM and ask them to submit a prescription to Medicare along with medical records showing why the CGM is necessary for your care. Your doctor's office typically handles this submission — you do not need to contact Medicare yourself at this stage.

Once your doctor submits the prescription and supporting documentation, Medicare will review it, usually within 5 to 10 business days. You can check the status by calling Medicare at 1-800-MEDICARE or logging into your Medicare account online. When Medicare approves the request, your doctor's office will receive a notification, and you can then take the prescription to Walgreens or another pharmacy that carries Freestyle sensors.

At Walgreens, provide your prescription and Medicare information. The pharmacy will verify your coverage and tell you what your coinsurance amount is. You pay that amount at the time of purchase, and Walgreens bills Medicare for the remaining 80 percent. Sensors typically come in boxes of 14 (a two-week supply), and you may need to refill the prescription monthly or every other month, depending on your doctor's orders.

What Happens If Medicare Denies Your Request

If Medicare denies your request for CGM coverage, your doctor's office will receive a denial notice explaining the reason. Common reasons for denial include insufficient medical documentation, a diagnosis that does not meet Medicare's criteria (such as type 2 diabetes not on insulin), or a information that the CGM is not medically necessary for your specific situation.

You have the right to appeal Medicare's decision within 180 days of the denial. Ask your doctor to submit additional medical records, such as recent blood sugar logs, A1C results, or notes explaining why the CGM is essential for your diabetes management. Your doctor can resubmit the prescription with this additional documentation, and Medicare will review it again. If the second review is still denied, you can request a formal appeal hearing, which involves a Medicare representative reviewing your case in detail.

Comparing Walgreens to Other Pharmacies for Freestyle Sensors

Walgreens is not the only pharmacy that dispenses Freestyle sensors on Medicare Part B. CVS, Rite Aid, and many independent pharmacies also carry them and accept Medicare coverage. The sensors themselves are identical regardless of where you purchase them — the difference is in convenience and customer service. Some people prefer their local independent pharmacy because the staff may be more familiar with their medical history. Others prefer Walgreens or CVS because of wider location availability or online refill options.

Before choosing a pharmacy, call ahead and confirm that they stock Freestyle sensors and accept Medicare Part B. Ask whether they can process your prescription on the same day or if there is a wait. Some pharmacies may need to special-order sensors, which can delay your first supply by a few days. Once you have established coverage with Medicare, you can switch pharmacies at any time — there is no requirement to use the same one every time.

Understanding Your Out-of-Pocket Costs

Your out-of-pocket cost for Freestyle sensors on Medicare Part B is 20 percent of the Medicare-approved amount. The approved amount is set by Medicare and is typically lower than the retail price Walgreens charges uninsured customers. For example, if the Medicare-approved amount for a 14-sensor box is $100, you would pay $20 and Medicare would pay $80.

If you have a Medigap plan (supplemental insurance), it may cover some or all of your 20 percent coinsurance, depending on the plan. If you have a Medicare Advantage plan, your coinsurance may be different — some plans cover CGM sensors with no coinsurance, while others charge a copay instead of coinsurance. Check your plan documents or call your plan's customer service line to find out exactly what you will pay.

Common Mistakes to Avoid

Do not assume Walgreens will automatically know you are covered for Freestyle sensors. Medicare coverage must be pre-approved by Medicare itself, not by the pharmacy. If you walk into Walgreens without a prescription and prior Medicare approval, the pharmacy will not be able to process a claim, and you will be asked to pay the full retail price.

Do not wait until you run out of sensors to refill your prescription. Sensors take time to dispense, and if you need them urgently, you may end up paying out of pocket for a quick supply while waiting for your Medicare-covered order. Ask your doctor to write prescriptions for multiple refills so you can request them in advance. Also, do not assume your doctor's office will automatically submit the prescription to Medicare — call and confirm that they have done so and ask for a timeline for when you should expect approval.

Frequently Asked Questions

Does Medicare Part B cover the Freestyle reader device?

Medicare Part B typically covers the sensors but not the reader device itself. However, some Medicare Advantage plans may cover the reader as part of their durable medical equipment benefit. Check your specific plan's coverage details or call your plan's customer service to confirm.

How often can I get new Freestyle sensors through Medicare?

Medicare covers one box of 14 sensors every 14 days, which equals two boxes per month. Your doctor's prescription should specify this frequency. If you need sensors more often due to a medical reason, your doctor can request a higher frequency, but Medicare must approve it.

Can I use Freestyle sensors from Walgreens with a Medicare Advantage plan?

Yes, Medicare Advantage plans cover durable medical equipment including CGM sensors, though the coverage details vary by plan. Some plans may require you to use a specific pharmacy or may have different coinsurance amounts. Contact your plan before filling your prescription to understand your out-of-pocket cost.

What if my doctor refuses to submit the prescription to Medicare?

If your doctor is unwilling to submit the prescription, you can request a referral to an endocrinologist who specializes in diabetes management. You can also contact Medicare directly at 1-800-MEDICARE to understand what documentation is needed, then ask your doctor to provide it. If your doctor still refuses, you may need to find a new provider who is willing to support your CGM use.

Can I buy Freestyle sensors at Walgreens without Medicare and use them later?

Yes, you can purchase sensors out of pocket at any time. However, if you have Medicare Part B coverage, buying them without using your coverage means you are paying the full retail price instead of your 20 percent coinsurance. It is usually more cost-effective to use your Medicare coverage once it is approved.

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.