Walmart cannot dispense Freestyle CGM sensors as a Medicare Part B supplier, but you can get them through other retailers that Medicare has enrolled.

Medicare Part B covers continuous glucose monitoring (CGM) systems for people with diabetes who meet specific medical criteria. The sensors themselves — the small devices you wear on your skin — are covered as durable medical equipment. However, not every pharmacy or retailer can bill Medicare for them. Walmart is not currently enrolled as a Medicare Part B DME supplier for CGM sensors, which means they cannot process the claim directly through Medicare, even if they stock the product.

You have two main paths to get Freestyle sensors covered by Medicare. You can order through a Medicare-enrolled DME supplier (a medical equipment company, not a pharmacy), or you can buy them at retail and submit a claim for reimbursement if your doctor's prescription meets Medicare's rules. The first route is simpler because the supplier handles the paperwork.

Key Takeaways

  • Walmart does not have Medicare Part B enrollment as a DME supplier for CGM sensors, so they cannot bill Medicare directly for them.
  • Medicare Part B covers Freestyle sensors only if your doctor documents that you use insulin and meet other medical criteria, and the supplier is enrolled with Medicare.
  • You can order Freestyle sensors from enrolled DME suppliers like Byram Healthcare, Edgepark, or Aeroflow Health, which will bill Medicare directly.
  • If you buy Freestyle sensors at Walmart or another retailer out of pocket, you may be able to submit a claim to Medicare for reimbursement, but this requires keeping all receipts and documentation.
  • Your doctor must submit a detailed prescription that includes your insulin regimen and the specific CGM model you need for Medicare to cover it.

Which Suppliers Can Bill Medicare for Freestyle Sensors

Medicare maintains a list of enrolled DME suppliers on its website, searchable by ZIP code and equipment type. Byram Healthcare, Edgepark, Aeroflow Health, and Medline are among the larger national suppliers that carry Freestyle sensors and are enrolled to bill Medicare Part B. Smaller local medical equipment companies may also be enrolled in your area.

When you contact a supplier, tell them you have a Medicare Part B prescription for a Freestyle CGM system. They will ask for your doctor's prescription, your Medicare card, and your contact information. The supplier then verifies your coverage with Medicare before sending the sensors. This process usually takes a few business days to a week.

If you prefer to order through a pharmacy, check whether your pharmacy is enrolled as a Medicare DME supplier — many are not. CVS, Walgreens, and other chain pharmacies may stock Freestyle sensors but cannot bill Medicare Part B for them. They can fill the prescription at the retail price, which you would then need to claim back to Medicare yourself.

What Medicare Requires Your Doctor to Document

Medicare Part B covers CGM sensors only for people with diabetes who use insulin. Your doctor must write a prescription that includes the specific CGM model (for example, FreeStyle Libre 2 or FreeStyle Libre 3), your insulin regimen, and confirmation that you meet medical criteria. The prescription is not the same as a regular pharmacy prescription — it is a detailed order that goes to the DME supplier.

Your doctor may need to submit additional documentation, called a Certificate of Medical Necessity (CMN), depending on your situation and the supplier's requirements. This form confirms that the CGM is medically necessary for your care. Some suppliers handle this paperwork on your behalf once they receive your initial prescription.

If your doctor is unsure what information to include, they can contact the DME supplier directly — suppliers have staff who work with doctors' offices regularly and can guide them through the process.

How to Claim Reimbursement if You Buy at Retail

If you purchase Freestyle sensors at Walmart or another retailer and pay out of pocket, you can submit a claim to Medicare for reimbursement. Keep your receipt, the itemized invoice showing the product name and price, and your prescription from your doctor. You will also need documentation that you meet Medicare's medical criteria — usually a note from your doctor confirming your insulin use and the medical reason for the CGM.

Submit these documents to your Medicare Part B carrier (the insurance company that processes Part B claims in your state). You can find your carrier's contact information and claim submission address on your Medicare card or by calling 1-800-MEDICARE. Some carriers accept claims online through their portal; others require mail or fax.

Medicare will review the claim and determine the allowable amount — the price it will reimburse. This may be less than what you paid at retail. Reimbursement typically takes four to six weeks after Medicare receives your claim. This route is slower and riskier than ordering through an enrolled supplier, because Medicare may deny the claim if your documentation does not meet their standards.

The Difference Between Freestyle Models and Medicare Coverage

Freestyle makes several CGM models: the Libre, Libre 2, and Libre 3. Medicare covers these models, but coverage rules and the frequency of sensor replacement can vary. Your doctor's prescription must specify which model you are using, because Medicare's payment rate and coverage terms differ by model.

The Freestyle Libre 3 is the newest model and is covered by Medicare Part B. However, some older plans or regional variations may have different coverage rules, so confirm with your supplier or doctor that the specific model your doctor prescribes is covered under your plan.

What to Do if Your Supplier Runs Out of Stock

If your enrolled supplier cannot get Freestyle sensors in stock, ask them for a timeline. Most suppliers can order sensors within a few days, but during high-demand periods there may be delays. If the delay is long, ask your supplier whether they can substitute a different CGM model that Medicare covers, such as the Dexcom G6 or Medtronic Guardian, while you wait for Freestyle to become available.

You can also contact a different enrolled supplier to see if they have stock. There is no rule that you must use the same supplier each time — you can switch suppliers between orders as long as each one is enrolled with Medicare and your doctor's prescription is current.

Frequently Asked Questions

Can I use my Walmart prescription discount card instead of Medicare Part B?

Yes, you can choose to use a discount card or pay cash at Walmart instead of using Medicare. However, if you use Medicare Part B, you will typically pay less out of pocket because Medicare covers a larger portion of the cost. Discuss the costs with your doctor and Walmart pharmacist to compare.

Does Medicare Part D cover Freestyle sensors?

No. Medicare Part D is prescription drug coverage and does not cover CGM sensors. Sensors are covered under Part B as durable medical equipment. If you have both Part B and Part D, only Part B applies to CGM sensors.

What if my doctor says I do not meet Medicare's criteria for a CGM?

Medicare has specific rules about who qualifies for CGM coverage. If your doctor believes you need a CGM but Medicare's criteria do not explore to you, ask your doctor about appealing the decision or paying out of pocket. Some people use CGMs without Medicare coverage because the benefit to their diabetes management outweighs the cost.

Can I order Freestyle sensors online directly from Abbott?

Abbott, the manufacturer of Freestyle, does not sell directly to consumers through Medicare Part B. You must order through an enrolled DME supplier. You can buy Freestyle sensors directly from Abbott's website or other retailers at full retail price, but Medicare will not cover that purchase unless you submit a claim for reimbursement.

How often does Medicare cover new Freestyle sensors?

Medicare covers sensor replacement based on the sensor's wear time. The Freestyle Libre 2 and Libre 3 sensors last 14 days, so Medicare typically covers one sensor every two weeks. Your supplier will manage the schedule and send sensors on a regular basis once your prescription is set up.