Medicare Diabetes Coverage: Insulin, CGMs & Supplies (2026)

If you have diabetes and Medicare, your coverage is split across two parts, and knowing which part pays for what is the difference between a smooth pharmacy trip and a surprise bill. Medicare covers insulin, glucose monitors, test strips, continuous glucose monitors, nutrition counseling, and prevention programs, but the rules and costs differ depending on whether a supply falls under Part B or Part D. This guide walks through each piece, starting with the change most people ask about: the $35 monthly cap on insulin.1

The $35 insulin cap

The single most important number for anyone with diabetes on Medicare is this one.

That $35 ceiling holds whether or not you've met any deductible, and it applies per insulin product, not per prescription bundle. If you take two different covered insulins, each is capped at $35 a month. The cap is built into how every Part D plan must price insulin, so you don't apply for it or fill out a form.1

Medicare diabetes coverage: Part B or Part D?

Most of the confusion around diabetes coverage comes down to one question: is this supply Part B or Part D? The split follows a logic. Part B, your medical insurance, covers equipment and clinical services. Part D, your drug plan, covers the medications you take at home and the supplies that go with them.

The line that trips people up most is insulin itself. Insulin you inject or use with a pen is a Part D drug. Insulin delivered through a durable insulin pump is Part B equipment. Both are capped at $35, but they run through different parts of your coverage, which matters when you're picking a plan or sorting out a bill.1

Continuous glucose monitors

A continuous glucose monitor, or CGM, tracks your blood sugar around the clock and has become standard for many people managing insulin. Part B covers a CGM and its supplies when your doctor prescribes it in line with its FDA-approved use and you either take insulin or have a history of problem low blood sugar (hypoglycemia). You also need a visit with your doctor within 6 months of the CGM being ordered, and enough training to use it.2

When Part B covers a CGM, you pay 20% of the Medicare-approved amount after you've met the Part B deductible, which is $283 in 2026. Because a CGM is durable medical equipment, you'll need a prescription and a Medicare-enrolled supplier, the same as any other equipment Medicare pays for.2,3

Test strips and lancets

If you check your blood sugar with a meter, Part B covers the monitor, test strips, and lancets as durable medical equipment. How many you can get depends on whether you use insulin.

• If you use insulin: up to 300 test strips and 300 lancets every three months.
• If you don't use insulin: up to 100 of each every three months.

Your doctor can order more than these amounts if it's medically necessary and documents why. As with a CGM, you pay 20% of the Medicare-approved amount after the Part B deductible, and you need a doctor's order filled through a Medicare-enrolled supplier.2

Training, nutrition, and prevention

Coverage isn't only about supplies. Medicare also pays for services that help you manage the condition or head it off.

Diabetes Self-Management Training (DSMT) teaches you how to manage diabetes day to day, including monitoring, diet, and medication. Medicare covers DSMT when you've been diagnosed with diabetes and your doctor or other health care provider orders it.2

Medical Nutrition Therapy (MNT) gives you counseling from a registered dietitian on eating to manage diabetes. MNT is a Part B benefit and works alongside DSMT rather than duplicating it. Unlike a CGM or test strips, MNT costs you nothing. It's one of three Part B diabetes services that carry no coinsurance and no deductible (the others are diabetes screening and the prevention program below), as long as you qualify and your provider accepts assignment.2

The Medicare Diabetes Prevention Program (MDPP) is for people who are at risk of developing type 2 diabetes but don't have it yet. MDPP is a structured lifestyle-change program built around coaching, healthy eating, and physical activity, aimed at preventing the disease before it starts. It also costs you nothing, and the old once-per-lifetime limit on it no longer applies: a 2026 federal law removed that limit, and CMS and Medicare.gov now state there is no limit on how many times you can enroll in MDPP services.2

Diabetes drug costs and the $2,100 Part D cap

Diabetes often means more than one prescription, so your total out-of-pocket drug spending for the year matters as much as any single copay. In 2026, Medicare Part D caps what you pay out of pocket for covered drugs at $2,100. Once your spending reaches that ceiling, you pay nothing for covered Part D drugs for the rest of the calendar year, and the $35-per-month insulin cap still applies underneath it. What counts toward the $2,100 is not only what you hand over at the pharmacy: certain payments made on your behalf, such as payments through Extra Help, count toward it too, so someone getting help paying for drugs reaches $0 earlier than their own receipts suggest.4,1

If you take a GLP-1 drug for type 2 diabetes, Medicare says your Part D drug plan should cover it, so check your plan's drug list. The Medicare GLP-1 Bridge, a short-term demonstration running from July 1, 2026 through December 31, 2027, gives eligible people certain GLP-1s for weight reduction at a $50 copayment for a month's supply, but it isn't open to people with type 2 diabetes, whose drug plan is the route instead. Our guide to GLP-1 and weight-loss drug coverage walks through that distinction.5

Diabetes coverage under Medicare Advantage

If you're in a Medicare Advantage plan (Part C) rather than Original Medicare, your plan must cover the medically necessary Part A and Part B services Original Medicare covers, so the diabetes equipment and services above stay covered, and the $35 insulin cap applies there too.6 What changes is how you get them. Most Medicare Advantage plans, especially HMOs, generally require you to use in-network providers, and a plan may require prior authorization before it covers certain items, which Original Medicare generally does not.6 Check your plan's rules before you order supplies, and use a supplier and pharmacy that are in the plan's network.1,2

What you need before you fill a prescription

Two practical requirements apply to most diabetes equipment, and skipping either is the usual reason a claim gets denied:

• A doctor's order for the supply or service.
• A Medicare-enrolled supplier to fill it. Buying from a supplier that isn't enrolled in Medicare can leave you paying the full cost yourself.

These apply to monitors, test strips, lancets, and CGMs. For Part D drugs like oral medications and pen insulin, you fill the prescription at a pharmacy in your drug plan's network instead.

If Medicare denies a diabetes claim

If a claim is denied, you have the right to appeal. Under Original Medicare, the first step is a redetermination, which you request within 120 days of getting the Medicare Summary Notice that shows the decision. In a Medicare Advantage plan, the appeal starts with the plan itself: you ask it to reconsider within 65 days of the date on its denial notice.7 When you're not sure why a claim was denied or how to challenge it, 1-800-MEDICARE (1-800-633-4227, TTY 1-877-486-2048) is the route CMS gives for an Original Medicare question, reachable 24 hours a day, 7 days a week, except some federal holidays; if the denial came from a Medicare Advantage plan, CMS directs you to the plan first, using the number on your member ID card.8

Where to get help

Learn More

Find personalized help understanding your Medicare diabetes coverage at brevy.com.

The information on Brevy.com is for educational purposes only and is not a substitute for professional legal, financial, or medical advice. Rules vary by state and program and change frequently. Always verify with the relevant agency or a qualified professional. Brevy is not a law firm, financial advisor, or healthcare provider.