Medicare Part B covers Dexcom G7 for people with diabetes who meet specific requirements
Yes, Medicare Part B covers the Dexcom G7 continuous glucose monitor, but not for everyone with diabetes. You must use insulin, either through injections or a pump, and your doctor must prescribe the device as medically necessary. Medicare pays 80% of the approved amount after you meet your Part B deductible; you pay the remaining 20% as coinsurance.
The Dexcom G7 is a small sensor worn on your body that reads your blood sugar every five minutes and sends the readings to a receiver or smartphone. Because it reduces the need for fingerstick testing and helps prevent dangerous blood sugar swings, Medicare considers it a durable medical equipment (DME) benefit rather than a supply you replace monthly.
Coverage details vary slightly depending on whether you have Original Medicare, a Medicare Advantage plan, or both. Your out-of-pocket costs and the suppliers you can use will differ based on your specific plan.
Key Takeaways
- Medicare Part B covers Dexcom G7 only if you use insulin and your doctor prescribes it as medically necessary.
- You pay 20% coinsurance after meeting your Part B deductible; the exact amount depends on your plan and supplier.
- You must order through a Medicare-approved DME supplier, and some suppliers charge different amounts within Medicare's approved price.
- Medicare Advantage plans may have different rules, copays, or prior authorization requirements than Original Medicare.
- Your doctor's prescription must specifically state that you use insulin and that the device is medically necessary for your care.
What your doctor needs to prescribe before Medicare will pay
Your doctor must write a prescription that includes your insulin regimen — either multiple daily injections or pump therapy — and state that continuous glucose monitoring is medically necessary for your diabetes management. The prescription goes directly to the DME supplier you choose, not to a pharmacy.
If your doctor has never prescribed a continuous glucose monitor before, they may need to document your medical history showing why fingerstick testing alone is not enough. This is especially important if you have frequent low blood sugar episodes, high A1C levels despite current treatment, or hypoglycemia unawareness (not feeling when your blood sugar drops dangerously low).
Some Medicare Advantage plans require prior authorization, meaning the plan must approve the prescription before the supplier ships your device. Ask your plan whether authorization is needed before your doctor sends the prescription.
How much you will pay out of pocket
Under Original Medicare, you pay 20% coinsurance of the approved amount after you meet your $240 Part B deductible (the deductible amount can change each year). The approved amount varies by region and supplier, but Medicare sets a national limit on what it will pay. If a supplier charges more than the approved amount, you are responsible for the difference — this is called balance billing.
Your actual out-of-pocket cost depends on three things: whether you have already met your Part B deductible this year, which DME supplier you use, and whether that supplier charges the full approved amount or less. A supplier might charge $300 approved, meaning you pay $60 coinsurance; another might charge $250 approved, meaning you pay $50 coinsurance.
If you have a Medigap (supplemental insurance) plan, it may cover some or all of your 20% coinsurance, depending on which Medigap plan you have. Check your Medigap policy or call the insurance company to confirm.
Medicare Advantage plans and Dexcom G7 coverage
Medicare Advantage plans (Part C) must cover Dexcom G7 at least as well as Original Medicare does, but they can charge different copays, coinsurance amounts, or deductibles. Some plans cover it with a $0 copay; others charge a percentage of the cost or a flat fee per month.
Many Medicare Advantage plans require prior authorization before you order the device. Contact your plan's customer service number (on your insurance card) to ask whether authorization is needed, what your out-of-pocket cost will be, and which DME suppliers are in-network. Using an in-network supplier usually means lower costs.
If your Medicare Advantage plan denies coverage or charges you more than you think is fair, you have the right to appeal. Your plan must provide an appeal process in your member handbook or on its website.
Choosing a Medicare-approved DME supplier
You cannot order Dexcom G7 directly from Dexcom and have Medicare pay. You must use a supplier enrolled in Medicare as a DME provider. Dexcom maintains a list of approved suppliers on its website, and you can also search the Medicare Supplier Directory at dmepos.cms.gov to find suppliers in your area.
Call at least two suppliers and ask for their price under Medicare, whether they bill Medicare directly (so you pay only your coinsurance), and how long delivery takes. Some suppliers offer faster shipping or better customer service, and comparing a few takes only a few phone calls.
Once you choose a supplier, give them your doctor's prescription and your Medicare information. The supplier handles billing Medicare and sends you an invoice for your coinsurance amount. You should receive your first Dexcom G7 sensor within one to two weeks.
Replacing sensors and transmitters under Medicare coverage
The Dexcom G7 sensor lasts 10 days and then must be replaced. Medicare covers replacement sensors as part of your DME benefit, meaning you continue to pay 20% coinsurance for each new sensor after your deductible is met. You do not pay a separate deductible for each sensor.
The transmitter (the small device that holds the sensor) lasts about 90 days. Medicare covers transmitter replacement the same way — 20% coinsurance after your deductible. Your DME supplier will send you new sensors and transmitters on a schedule, usually every 10 days for sensors and every 90 days for transmitters.
If a sensor fails early or a transmitter stops working before 90 days, contact your supplier. Most suppliers will replace it at no extra cost if you report the problem within a certain timeframe (usually 30 days).
What to do if Medicare denies coverage
If your claim is denied, the denial letter will explain the reason. Common reasons include: your doctor did not document that you use insulin, the prescription did not come from your doctor, or the supplier is not enrolled in Medicare.
Ask your doctor to review the denial and resubmit the prescription with clear documentation of your insulin use and medical need. If the issue is with the supplier, ask whether they are enrolled in Medicare or whether there was a billing error.
You have the right to appeal any denial. The denial letter includes instructions for filing an appeal. You can also contact your State Health Insurance information Program (SHIP), a free counseling service. Find your state's SHIP at shiptalk.org or call 1-877-839-2675.
Frequently Asked Questions
Do I have to use insulin to get Medicare to pay for Dexcom G7?
Yes. Medicare covers Dexcom G7 only for people who use insulin through injections or a pump. If you manage your diabetes with oral medications alone, Medicare will not cover the device. Your doctor's prescription must document your insulin regimen.
Can I use my Dexcom G7 reader and smartphone app with Medicare coverage?
Yes. The Dexcom G7 can send readings to a receiver device or to a compatible smartphone. Medicare covers the sensor and transmitter; you pay for the smartphone separately if you choose to use one instead of the receiver.
What happens if I switch from Original Medicare to a Medicare Advantage plan mid-year?
Your new Medicare Advantage plan takes over coverage on your effective date. Contact the new plan to confirm they cover Dexcom G7, what your copay or coinsurance will be, and whether you need prior authorization. Your old supplier may need to transfer your prescription to a new in-network supplier.
Will Medicare pay for Dexcom G7 if I also have Medicaid?
If you have both Medicare and Medicaid (dual may be able to access), Medicare is your primary payer. Medicaid may cover costs Medicare does not, such as your coinsurance, depending on your state's rules. Contact your state Medicaid office to learn what they cover.
Can I get Dexcom G7 sensors shipped to me automatically each month?
Yes. Most Medicare-approved DME suppliers offer automatic shipment on a schedule — usually every 10 days for sensors. You can adjust the schedule or pause shipments by contacting your supplier. Make sure the supplier knows your preferred delivery dates.