How many Dexcom G7 sensors does Medicare cover per month?

Medicare generally covers up to three Dexcom G7 sensors per month (approximately one sensor every 10 days, matching the G7's wear duration). Your supplier will submit claims based on Medicare's approved quantities.

Do I need a prior authorization to get the Dexcom G7 through Medicare?

Original Medicare Part B does not require prior authorization for Therapeutic CGMs like the Dexcom G7, but Medicare Advantage plans may have their own prior authorization requirements. Always check with your specific plan before ordering.

Can I use my FSA or HSA to pay the 20% coinsurance for my Dexcom G7?

Yes. The 20% Medicare coinsurance for your Dexcom G7 is an eligible medical expense that can typically be paid using an FSA (Flexible Spending Account) or HSA (Health Savings Account), helping reduce your effective out-of-pocket cost.

Where can I order Dexcom G7 supplies that accept Medicare?

You must order from a Medicare-enrolled DME supplier. MDS Diabetes at mdsdiabetes.com offers Dexcom G7 supplies and can help guide you through the insurance and ordering process to ensure your coverage is applied correctly.

Medicare Coverage for Dexcom G7: Complete Guide

Key takeaways

✓Medicare Part B covers the Dexcom G7 as a Therapeutic CGM — paying 80% after your deductible is met
✓Eligibility now only requires insulin use and a doctor's prescription — no fingerstick minimums required
✓Ordering through an approved supplier like mdsdiabetes.com simplifies the process with auto-shipment options

Does Medicare Cover the Dexcom G7?

Yes — Medicare covers the Dexcom G7 Continuous Glucose Monitor (CGM) under the Medicare Part B Durable Medical Equipment (DME) benefit. This is significant news for the millions of Medicare beneficiaries managing diabetes, as the Dexcom G7 represents one of the most advanced, accurate, and user-friendly CGM systems available today.

Understanding exactly what Medicare covers, what you'll pay out of pocket, and how to access your supplies efficiently can make a real difference in your diabetes management and your budget.

Medicare Eligibility Requirements for the Dexcom G7

To qualify for Medicare coverage of the Dexcom G7, you must meet the following criteria established by Medicare:

You have been diagnosed with diabetes (Type 1 or Type 2)
Your treating physician has determined that CGM is medically necessary for your care
You require insulin therapy — meaning you use insulin via injections or a pump to manage blood sugar
You have a face-to-face visit with your doctor within the six months prior to ordering the CGM
You are enrolled in Medicare Part B

It is important to note that Medicare does not currently require a minimum number of daily fingerstick tests to qualify, a requirement that was eliminated in recent policy updates — making CGM access easier for more beneficiaries.

What Does Medicare Part B Cover?

Medicare Part B classifies CGM systems like the Dexcom G7 as Therapeutic CGMs (tCGMs), meaning readings from the device can be used directly for treatment decisions without requiring a confirmatory fingerstick test. Under Part B, Medicare typically covers:

The Dexcom G7 receiver (the display device)
Dexcom G7 sensors (up to a monthly quantity determined by Medicare)
Replacement transmitters as needed (note: the G7 has an integrated transmitter within each sensor)

After meeting your Part B deductible, Medicare generally pays 80% of the Medicare-approved amount. You are responsible for the remaining 20% coinsurance, which may be covered by a Medigap supplemental policy if you have one.

How to Get Your Dexcom G7 Through Medicare

The process of obtaining your Dexcom G7 through Medicare involves a few key steps:

Get a prescription: Your endocrinologist or primary care physician must write a detailed prescription and document medical necessity in your records.
Choose a Medicare-approved supplier: You must obtain your CGM supplies from a Medicare-enrolled Durable Medical Equipment supplier. MDS Diabetes is a trusted source where you can explore Dexcom G7 supplies and verify coverage options at mdsdiabetes.com.
Verify your coverage: Confirm your plan details, deductible status, and any prior authorization requirements before ordering.
Set up auto-shipments: Many suppliers, including mdsdiabetes.com, offer convenient recurring delivery so you never run out of sensors.

What If You Have Medicare Advantage?

If you are enrolled in a Medicare Advantage (Part C) plan, CGM coverage rules may differ slightly by plan. Most Medicare Advantage plans are required to cover the same benefits as Original Medicare, but prior authorization requirements and preferred supplier networks can vary. Always call your plan directly to confirm Dexcom G7 coverage and find in-network suppliers.

Reducing Your Out-of-Pocket Costs

Even with Medicare coverage, the 20% coinsurance can add up. Here are strategies to reduce your costs:

Use a Medigap or Medicare Supplement plan to cover coinsurance
Check if you qualify for Extra Help (Low Income Subsidy) programs
Compare supplier pricing — mdsdiabetes.com offers competitive pricing on Dexcom G7 supplies
Ask your doctor about samples to bridge any coverage gaps

Dexcom G7 vs. G6 Under Medicare

Medicare covers both the Dexcom G6 and G7. The G7 features a smaller sensor, a 30-minute warm-up period (down from two hours), and a 12-hour grace period after sensor expiration. If you are currently using the G6 and wish to upgrade to the G7, speak with your doctor about updating your prescription. Many suppliers including mdsdiabetes.com carry both systems to suit your needs.

References & Sources

Frequently asked questions

Yes. Medicare covers the Dexcom G7 for both Type 1 and Type 2 diabetes, provided you use insulin to manage your blood sugar and have a prescription documenting medical necessity from your treating physician.

Editorial note

This article is for educational purposes only and does not constitute medical advice. Always consult your healthcare provider before making changes to your diabetes management. Last reviewed: July 12, 2026 by the MDS Diabetes editorial team.

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