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 cap on insulin.
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.
Part B or Part D? Which part pays for what
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.
| Covered under Part B | Covered under Part D |
|---|---|
| Blood sugar monitors | Oral anti-diabetic drugs (pills) |
| Test strips and lancets | Injected and pen insulin |
| Continuous glucose monitors (CGMs) and sensors | Syringes and needles |
| Insulin used in a durable insulin pump | Insulin-related supplies for injections |
| A1C tests | |
| Medical nutrition therapy | |
| Diabetes Self-Management Training |
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.
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 sensors when two conditions are met: your doctor orders it, and you either take insulin or have a history of problem low blood sugar (hypoglycemia).
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.
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.
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 it when your doctor orders it as part of your treatment plan.
Medical nutrition therapy gives you counseling from a registered dietitian on eating to manage diabetes. It's a Part B benefit and works alongside DSMT rather than duplicating it.
The Medicare Diabetes Prevention Program is for people who are at risk of developing type 2 diabetes but don't have it yet. It's a structured lifestyle-change program built around coaching, healthy eating, and physical activity, aimed at preventing the disease before it starts.
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.
Frequently asked questions
No. There's no deductible on insulin. You pay no more than $35 for a one-month supply of each covered insulin product whether or not you've met any other deductible for the year.
It can. Part B covers a CGM when your doctor orders it and you either take insulin or have a documented history of problem low blood sugar. If you take no insulin and have no such history, a CGM generally isn't covered.
Not always. Insulin you inject or use with a pen is covered under Part D. Insulin used with a durable insulin pump is covered under Part B as part of the equipment benefit. Both are capped at $35 a month.
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. Your doctor can request more when it's medically necessary.
Learn More
- What is Medicare? Parts A, B, C, and D explained
- How Medicare Part D drug coverage works
- Durable medical equipment coverage
- Medicare preventive services and screenings
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.