Medicare Coverage for Dexcom G7

Medicare Part B covers the Dexcom G7 continuous glucose monitor (CGM) for people with diabetes who meet specific requirements. The device itself, the sensors, and the transmitter are all covered. However, not every person with diabetes qualifies — Medicare has rules about who can receive it and under what circumstances.

Coverage is available through Medicare Part B's Durable Medical Equipment (DME) benefit. You will need a prescription from your doctor, and you will work with a Medicare-approved DME supplier to obtain the device. The supplier handles the paperwork with Medicare, not you.

Key Takeaways

  • Medicare Part B covers Dexcom G7 for people with diabetes who use insulin and meet specific medical criteria, with a prescription from your doctor.
  • You must obtain the device through a Medicare-approved DME supplier, who submits the paperwork to Medicare on your behalf.
  • Your out-of-pocket cost depends on whether you have met your Part B deductible and whether you have supplemental coverage or a Medigap plan.
  • Sensors are replaced weekly, and Medicare covers the cost of replacement sensors as part of the DME benefit.
  • If Medicare denies your request, you have the right to appeal the decision within 180 days.

Who Qualifies for Dexcom G7 Under Medicare

Medicare covers Dexcom G7 for people with diabetes who use insulin injections or an insulin pump. You must also have a prescription from your doctor stating that a CGM is medically necessary for your care. Medicare does not cover the device for people who manage diabetes with oral medications alone.

Your doctor must document that you have one of the following: frequent episodes of low blood sugar (hypoglycemia), difficulty recognizing when your blood sugar is dropping, or unstable blood sugar levels despite insulin therapy. The medical reason matters — Medicare will not cover it straightforward because you want to monitor your glucose more closely.

If you have already been using a different CGM (such as Freestyle Libre or Medtronic Guardian), you may still be able to switch to Dexcom G7. Your doctor will need to explain why the change is medically necessary.

How to Request Dexcom G7 Through Medicare

Start by talking to your doctor. Tell them you are interested in using Dexcom G7 and ask whether they think it would help your diabetes management. If your doctor agrees, they will write a prescription and may need to complete additional paperwork that Medicare requires, called a Certificate of Medical Necessity (CMN).

Next, contact a Medicare-approved DME supplier. You can find suppliers in your area by calling Medicare at 1-800-MEDICARE or by searching the Medicare supplier directory online. When you call a supplier, give them your Medicare number and your doctor's prescription. The supplier will verify your coverage, explain your out-of-pocket costs, and handle all the paperwork with Medicare.

The supplier will submit your prescription and the CMN to Medicare for review. This process usually takes one to two weeks. Medicare will either approve the request or send a denial letter explaining why. If approved, the supplier will ship the Dexcom G7 starter kit to you.

What Medicare Pays and What You Pay

Medicare Part B covers 80 percent of the approved amount for Dexcom G7 after you have met your annual Part B deductible. You are responsible for the remaining 20 percent. The exact dollar amount you pay depends on the supplier's charge and the amount Medicare approves.

Replacement sensors are covered under the same benefit. You receive a new sensor every seven days, and Medicare covers the cost of each sensor at the same 80/20 split. If you have a Medigap supplemental plan, it may cover some or all of your 20 percent coinsurance, depending on your plan.

If you have a Medicare Advantage plan (Part C) instead of Original Medicare, your out-of-pocket costs may be different. Some Medicare Advantage plans cover CGMs with a copay; others require coinsurance. Contact your plan directly to learn what you will owe.

Common Reasons Medicare Denies Dexcom G7 Requests

Medicare denies coverage when the person does not use insulin, when the doctor's documentation does not show a medical reason, or when the request comes from a supplier that is not Medicare-approved. Denials also happen when the CMN is incomplete or when Medicare believes the person has not tried other, less expensive options first.

If your request is denied, the denial letter will explain the reason. You have 180 days from the date of the denial to file an appeal. You can ask your doctor to provide additional medical information, or you can ask the supplier to resubmit with more detail. Many denials are overturned on appeal when the doctor provides clearer documentation of medical necessity.

Switching From Another CGM to Dexcom G7

If you currently use Freestyle Libre, Medtronic Guardian, or another CGM, you can switch to Dexcom G7 under Medicare. Your doctor must write a new prescription and explain why the switch is medically necessary — for example, if your current device is not controlling your blood sugar well enough or if you are having side effects.

Medicare typically allows a switch after you have used your current device for at least 12 months, though exceptions exist if your doctor documents that the current device is not working. Contact your DME supplier to discuss whether a switch is possible in your situation.

Getting Help With the Process

If you are unsure whether you may have access to or if you need help understanding your costs, call Medicare at 1-800-MEDICARE. They can tell you whether your doctor's prescription meets Medicare's requirements and what your out-of-pocket cost will be based on your deductible status.

Your doctor's office can also help. Many practices have staff who work with insurance and can answer questions about what Medicare will cover. The DME supplier you choose will walk you through the approval process step by step and will contact Medicare on your behalf.

Frequently Asked Questions

Does Medicare cover the Dexcom G7 reader, or do I have to use my phone?

Dexcom G7 works with a smartphone app, and you do not need a separate reader. Medicare covers the transmitter and sensors. If you do not have a compatible smartphone, you can purchase a dedicated reader from Dexcom, but Medicare does not cover the reader itself.

What happens if Medicare approves my request but I change my mind?

You can decline the device at any time. If the supplier has already shipped it, you can refuse delivery or return it unopened. Once you start using it, you own it, and Medicare will not pay for a replacement if you decide you do not want it.

How often can I get a new Dexcom G7 transmitter?

The transmitter lasts approximately 90 days. Medicare covers a new transmitter every 90 days. Your doctor's prescription will specify the frequency, and the DME supplier will manage the replacement schedule.

Will my Medicare Advantage plan cover Dexcom G7 the same way Original Medicare does?

No. Medicare Advantage plans set their own coverage rules and costs. Some cover Dexcom G7 with a copay; others require coinsurance or may not cover it at all. Contact your plan's customer service number to learn what your specific plan covers.

What if my doctor says I need Dexcom G7 but Medicare denies it?

You have the right to appeal. Ask your doctor to send additional medical records or a letter explaining why the device is necessary for your care. The DME supplier can resubmit your request with this new information. Many appeals succeed when doctors provide more detail about your blood sugar patterns or hypoglycemia episodes.