Does Medicare Cover a Continuous Glucose Monitor? Your Guide

Managing Diabetes Shouldn’t Mean Pricking Your Finger All Day

If you’re one of the nearly 15 million Americans over 65 living with diabetes, you know the daily routine all too well — prick your finger, squeeze a drop of blood, wait for the reading, and repeat. Multiple times a day, every single day.

It’s painful, inconvenient, and frankly exhausting. So when continuous glucose monitors (CGMs) came along — small, wearable devices that track your blood sugar automatically — it felt like a game-changer. But here’s the question almost every senior with diabetes asks: does Medicare cover a continuous glucose monitor?

The good news is that yes, Medicare does cover CGMs for qualifying beneficiaries. But like most things with Medicare, the details matter. There are specific eligibility requirements, coverage rules, and out-of-pocket costs you need to understand before you can get one.

In this guide, we’ll walk you through everything you need to know — in plain English — so you can make the best decision for your health and your wallet.

What Is a Continuous Glucose Monitor (CGM)?

A continuous glucose monitor is a small device, usually worn on your arm or abdomen, that measures your blood sugar levels around the clock. A tiny sensor just beneath your skin checks glucose in your tissue fluid every few minutes and sends the data to a receiver, smartphone app, or compatible insulin pump.

Unlike traditional finger-stick meters that give you a single snapshot, a CGM provides a complete picture of your glucose trends — showing you how your levels rise and fall throughout the day and night. This is incredibly valuable because it helps you and your doctor make smarter decisions about food, exercise, and medication.

Popular CGM brands include:

• Dexcom G6 and G7 — widely used, known for accuracy and smartphone integration
• FreeStyle Libre 2 and Libre 3 — affordable and easy to use, sometimes called “flash” glucose monitors
• Medtronic Guardian — often paired with Medtronic insulin pumps

Each of these devices has been approved by the FDA, and importantly, several are now covered under Medicare’s durable medical equipment (DME) benefit.

How Does Medicare Cover CGMs?

Medicare classifies continuous glucose monitors as durable medical equipment (DME) under Part B. This is a critical distinction because it determines how the coverage works, what you’ll pay, and where you need to get your supplies.

Here’s what Medicare Part B CGM coverage looks like:

1. Medicare pays 80% of the Medicare-approved amount for the CGM device and supplies after you meet your annual Part B deductible (which is $240 in 2024).
2. You pay the remaining 20% as your coinsurance — unless you have a Medigap (supplemental) policy or Medicare Advantage plan that covers that portion.
3. You must get your CGM from a Medicare-approved DME supplier. Buying from a pharmacy or non-approved retailer typically means Medicare won’t cover it under Part B.

Some Medicare Advantage (Part C) plans may offer CGM coverage through their pharmacy benefit or with different cost-sharing rules. It’s worth checking your specific plan’s formulary and DME policies. You can explore coverage options at our Medicare Benefits Hub for more details.

One important update: In 2023, the Centers for Medicare & Medicaid Services (CMS) expanded access to CGMs significantly. Previously, you needed to be on intensive insulin therapy with multiple daily injections. Now the rules are broader — which we’ll cover next.

Who Qualifies for Medicare CGM Coverage?

This is where many seniors get confused, so let’s break it down clearly. As of the most recent CMS guidelines, you qualify for Medicare coverage of a CGM if you meet all of the following criteria:

1. You have diabetes (Type 1 or Type 2).
2. You are being treated with insulin OR you have a history of problematic hypoglycemia (dangerously low blood sugar episodes).
3. Your treating physician manages your diabetes and has an in-person or telehealth visit with you at least every six months to review your CGM data and adjust your treatment plan.
4. Your doctor writes a prescription specifically for a CGM and documents why it’s medically necessary.

The 2023 expansion was a big deal. Before that change, Medicare required you to be injecting insulin at least three times a day or using an insulin pump. That rule left out millions of Type 2 diabetics who used insulin once or iwice daily, or who were on non-insulin medications but still struggled with dangerous blood sugar swings.

Now, even if you use a single daily insulin injection — or if you have documented episodes of hypoglycemia that put your safety at risk — you may qualify.

A helpful tip: Make sure your doctor clearly documents your medical necessity in your records. Medicare claims are sometimes denied not because the patient doesn’t qualify, but because the paperwork doesn’t adequately support the need. Ask your doctor’s office to be thorough.

What Will a CGM Cost You With Medicare?

Understanding your out-of-pocket costs helps you plan your budget. Here’s a realistic breakdown:

• Annual Part B deductible: $240 (2024). You pay this before Medicare coverage kicks in.
• After deductible: Medicare pays 80% of the approved amount; you pay 20%.
• Typical monthly cost of CGM supplies: The Medicare-approved amount for CGM receivers and sensors varies, but without supplemental coverage, your 20% coinsurance might run roughly $30–$75 per month depending on the device.

Here’s how to reduce your costs even further:

1. Medigap (Medicare Supplement) plans — Many plans, especially Plan F and Plan G, cover the 20% coinsurance, potentially bringing your CGM cost to $0 after your deductible.
2. Medicare Advantage plans — Some plans have $0 copays on DME or include additional diabetes management benefits. Compare plans during Open Enrollment.
3. Manufacturer assistance programs — Dexcom and Abbott (FreeStyle Libre) both offer savings programs and may help with costs that insurance doesn’t cover.
4. Extra Help / Medicare Savings Programs — If you have limited income, you may qualify for state programs that reduce your Medicare costs across the board.

For a complete picture of your Medicare costs and benefits, be sure to download our free Medicare checklist — it walks you through everything in one simple document.

How to Get a CGM Through Medicare: Step-by-Step

Ready to move forward? Here’s your action plan:

1. Talk to your doctor. Explain that you’re interested in a CGM. Ask if you meet Medicare’s eligibility criteria and request a prescription.
2. Make sure your doctor documents medical necessity. This should include your diabetes diagnosis, current treatment regimen, any history of hypoglycemia, and a statement that a CGM is medically necessary for managing your condition.
3. Find a Medicare-approved DME supplier. This is essential. You can search for approved suppliers at Medicare.gov or call 1-800-MEDICARE (1-800-633-4227). Some CGM manufacturers also help connect you with approved suppliers.
4. Verify your coverage. Call Medicare or your Medicare Advantage plan to confirm that the specific CGM model your doctor prescribes is covered. Not all models may be approved.
5. Schedule your follow-up visits. Remember, Medicare requires that your doctor reviews your CGM data at least every six months. Keep these appointments — if you skip them, you could lose coverage.

Pro tip: If your initial claim is denied, don’t give up. Medicare denials can be appealed, and many are overturned when proper documentation is submitted. Ask your doctor’s billing office for help with the appeals process.

Why CGMs Are Worth It for Seniors

Beyond the convenience of fewer finger pricks, continuous glucose monitors offer real, measurable health benefits — especially for adults over 60.

According to a 2022 study published in JAMA Internal Medicine, seniors with Type 2 diabetes who used CGMs saw a significant reduction in time spent with dangerously high or low blood sugar levels. The American Diabetes Association also reports that CGM use is associated with lower A1C levels, which means better long-term diabetes control and fewer complications.

For seniors specifically, CGMs can help:

• Prevent dangerous hypoglycemia — Low blood sugar episodes can cause falls, confusion, and even hospitalization. CGMs alert you before levels drop too low.
• Reduce emergency room visits — Better glucose control means fewer diabetes-related emergencies.
• Improve quality of life — No more waking up at 2 a.m. to check blood sugar. The CGM does it for you.
• Empower better decisions — Seeing real-time data helps you understand how specific foods, activities, and medications affect your glucose.

If you’re managing diabetes, a CGM isn’t a luxury — it’s a tool that can genuinely protect your health and give you peace of mind.

For more helpful articles about navigating your Medicare benefits, visit our Medicare blog where we cover everything from prescription drug coverage to preventive screenings.