Does Medicare cover the Dexcom G7?

Last reviewed August 20, 2026 by the Medically Modern coverage team. Coverage rules change — always confirm with Medicare or your plan before relying on a figure here.

Medicare covers continuous glucose monitors, including the Dexcom G7®, under the Part B durable medical equipment (DME) benefit. That means it is not a pharmacy benefit and not a Part D drug — it runs through a DME supplier, and the rules that apply are Medicare's DME rules.

Dexcom states that the Dexcom G6 and Dexcom G7 are covered by Medicare. Note that Dexcom's Medicare page does not list the newer G7 15 Day as Medicare-covered, so if you are specifically after the 15-day sensor, confirm its status before you order — we cover that in more detail on our G7 15 Day and Medicare page.

The coverage criteria, in plain English

Medicare's policy for glucose monitors (LCD L33822 and its accompanying policy article) sets out what you must meet. You need both of the following.

First: you have diabetes mellitus

Diagnosed and documented by your treating practitioner. This part is rarely the obstacle.

Second: you meet one of these two conditions

• You are treated with insulin. Any insulin, any regimen. Since Medicare's 2023 expansion, there is no longer a requirement to inject multiple times a day or test your blood sugar four times daily. If you use insulin, you meet this branch.
• Or you have a history of problematic hypoglycemia, with documentation of at least one of the following:
  • Recurrent (more than one) level 2 hypoglycemic events — glucose below 54 mg/dL — that persist despite multiple attempts to adjust medication and/or modify your diabetes treatment plan; or
  • One level 3 hypoglycemic event — glucose below 54 mg/dL — characterized by altered mental and/or physical state requiring third-party assistance to treat.

The requirement that causes most denials

If a Medicare CGM claim gets denied, the clinical criteria are usually not the reason. The visit requirement is.

• Before the order: within the six months prior to ordering the CGM, your treating practitioner must have had an in-person or Medicare-approved telehealth visit with you to evaluate your diabetes control.
• After the order: every six months following the initial prescription, your treating practitioner must conduct another in-person or approved telehealth visit documenting your adherence to the CGM regimen and your diabetes treatment plan.

In practice this means your G7 supply can lapse for a reason that has nothing to do with your health: you were due for a six-month visit, it did not get booked, and the next claim bounced. Putting the follow-up visit in your calendar the day you start is the single most useful thing you can do to keep coverage uninterrupted.

What you will pay on Medicare in 2026

Once you qualify, Part B cost sharing works the way it does for other DME:

If you have a Medicare Advantage (Part C) plan, your plan sets its own cost sharing and network rules. Some reduce or waive the coinsurance; some require prior authorization or a specific supplier. Check with the plan directly rather than assuming Original Medicare's numbers apply.

Coupons and Medicare do not mix

This is worth stating plainly, because a lot of sites blur it. Federal anti-kickback rules prohibit manufacturer coupons and copay assistance for people with Medicare, Medicaid, TRICARE or VA benefits. Dexcom's free trial explicitly excludes government health plans, and its pharmacy savings coupon requires you to opt out of insurance entirely for that fill — which, on Medicare, means giving up the coverage that is almost certainly cheaper for you.

• You cannot use Dexcom's free trial on Medicare.
• You cannot stack a manufacturer coupon on top of Medicare coverage.
• Be skeptical of any site offering Medicare beneficiaries free sensors — the HHS Office of Inspector General has repeatedly warned about “free diabetic supply” schemes that exist to harvest Medicare numbers.

What does lower your cost on Medicare: supplemental coverage, and using a supplier that accepts Medicare assignment so you are billed the Medicare-allowed amount rather than more.

How Medicare bills a CGM

You do not need to memorize this, but recognizing the codes helps when you are reading an explanation of benefits or arguing a denial:

• E2103 — non-adjunctive continuous glucose monitor (the receiver/transmitter side). The G7 is non-adjunctive, meaning you can dose from it without a confirmatory fingerstick.
• E2102 — adjunctive CGM.
• A4239 — supply allowance for a non-adjunctive CGM; one unit covers 30 days.

If your denial letter cites one of these codes, the issue is usually documentation rather than eligibility, and it is often fixable on appeal with the right visit notes attached.

Frequently asked questions

Does Medicare cover the Dexcom G7 for type 2 diabetes?

Yes, if you meet the criteria. Medicare's policy does not distinguish between type 1 and type 2 — it asks whether you have diabetes mellitus and whether you use insulin or have documented problematic hypoglycemia. A person with type 2 diabetes on insulin meets the criteria.

Does Medicare cover a CGM if I do not use insulin?

Only through the problematic-hypoglycemia branch. You would need documentation of recurrent level 2 events below 54 mg/dL that persisted despite treatment changes, or one level 3 event requiring third-party assistance. Without insulin use or that documentation, Medicare will not cover it.

Is the Dexcom G7 covered under Part B or Part D?

Part B, as durable medical equipment. This surprises people who expect to pick sensors up at a pharmacy counter like a prescription. It also means Part B rules apply: the annual deductible, 20% coinsurance, and the six-month visit requirement.

What if my claim was denied?

Find out which requirement the denial cites. If it is the visit requirement, the fix is usually getting your practitioner to document a qualifying visit and resubmitting. If it is the clinical criteria, your practitioner may need to document insulin use or hypoglycemic events more specifically. Denials on documentation grounds are frequently overturned on appeal.

Can I switch from a Dexcom G6 to a G7 on Medicare?

Generally yes — Dexcom states both are Medicare-covered, and the coverage criteria are the same because they apply to CGMs as a category rather than to a specific model. Your supplier handles the transition; talk to your practitioner about updating the prescription.

Medicare Advantage plans work differently

Everything above describes Original Medicare. If you have a Medicare Advantage (Part C) plan, the plan must cover at least what Original Medicare covers, but it sets its own cost sharing, prior-authorization rules, and supplier network. In practice that means:

• Your cost may be lower than 20% coinsurance — some plans reduce or waive it, and some use a flat copay instead.
• Prior authorization is more common than under Original Medicare.
• You may be restricted to in-network suppliers. Using an out-of-network supplier can mean paying much more or nothing being covered.
• The plan may have a preferred CGM brand, which Original Medicare does not.

Call the plan rather than assuming Original Medicare's numbers apply to you. Ask for the CGM benefit specifically, and ask whether the supplier you intend to use is in network.

What to look for in a supplier

Medicare only pays for durable medical equipment from suppliers that meet its requirements, and one detail affects your bill directly:

• Enrolled in Medicare and accredited for the item being supplied.
• Accepts assignment. This is the one that costs you money if you get it wrong. A supplier that accepts assignment agrees to the Medicare-approved amount as full payment, so your share is the 20% coinsurance and nothing more. A supplier that does not can charge you above that.
• Handles the documentation. Ask directly whether they coordinate the visit documentation and any authorization with your prescriber, or whether that is left to you.

Appealing a Medicare denial

Medicare has a formal, multi-level appeals process with deadlines, and denials on documentation grounds are frequently overturned:

1. Redetermination

   The first level, handled by the contractor that processed the claim. Usually where a missing visit note or a clearer statement of insulin use resolves things.

2. Reconsideration

   An independent review if redetermination fails.

3. Administrative Law Judge hearing

   Available above a minimum amount in controversy.

4. Further review

   The Medicare Appeals Council, and then federal court.

Most CGM cases end at the first level once the documentation is supplied. The deadlines are firm, so note the date on the denial notice and work backwards. Your supplier and your prescriber's office should both be involved — the evidence a redetermination needs usually lives in the chart, not in your files.

Practical things that come up

• Traveling. Plan supply around trips; a lapse while away is harder to fix. Ask your supplier about timing a shipment before you leave.
• Failed sensors. Contact Dexcom about its replacement policy rather than using up a covered fill.
• Changing prescribers. Make sure the new one knows the six-month documentation requirement exists, and that the first visit with them is documented accordingly.
• January. The Part B deductible resets each calendar year, so your first order of the year will cost more than your December order did. In 2026 that reset is $283.

Sources: CMS LCD L33822 (Glucose Monitors), CMS Policy Article A52464, CMS 2026 Part B premiums & deductibles, Noridian DME — Glucose Monitors, Dexcom Medicare FAQ.

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