What Diabetic Supplies Medicare Part B Actually Covers

Medicare Part B covers specific diabetes supplies, but not all of them

Medicare Part B covers blood glucose monitors, test strips, lancets, and some other diabetes supplies — but only if your doctor says you need them and you meet certain conditions. The program does not cover insulin, syringes, or pen needles under Part B (those fall under Part D, your prescription drug plan). Part B also does not cover continuous glucose monitors in most cases, though that rule has exceptions. What you pay depends on whether you have met your deductible and whether you use a supplier that accepts Medicare assignment.

The key to getting coverage is understanding which supplies may have access to, what your doctor has to document, and which suppliers Medicare recognizes. Many people pay out of pocket for supplies they could have covered, or they use the wrong supplier and end up paying more.

Key Takeaways

Medicare Part B covers blood glucose monitors, test strips, lancets, and lancing devices if your doctor documents that you have diabetes and need them to manage your condition.
Insulin, syringes, and insulin pen needles are covered under Part D (prescription drug coverage), not Part B.
You must use a Medicare-approved supplier and your doctor must write an order; you cannot straightforward buy supplies and submit a receipt for reimbursement.
After you meet your Part B deductible, you typically pay 20 percent of the Medicare-approved amount for covered supplies.
Continuous glucose monitors are not routinely covered by Part B, though some people with insulin-dependent diabetes may have coverage under specific circumstances.

Which diabetes supplies Part B actually covers

Medicare Part B covers blood glucose monitors (also called glucometers or glucose meters), test strips, lancets, and lancing devices. These are the core supplies for checking your blood sugar at home. Part B also covers glucose control solutions — the liquid you use to test whether your meter is working correctly.

Coverage depends on your type of diabetes and how you manage it. If you take insulin, Part B covers these supplies. If you manage your diabetes with oral medications alone (pills), coverage is more limited — you may still get a monitor and strips, but your doctor has to document medical necessity. Part B does not cover supplies for people who manage diabetes through diet alone.

The supplies must be for home use. Supplies used in a hospital or doctor's office are billed differently and are not your responsibility.

What Part B does not cover

Insulin is covered under Part D (your prescription drug plan), not Part B. This includes all types: rapid-acting, long-acting, NPH, and premixed insulins. Syringes and insulin pen needles are also Part D, not Part B. If you use an insulin pump, the pump itself may be covered under Part B as durable medical equipment, but the insulin cartridges and infusion sets are Part D.

Continuous glucose monitors (CGMs) like Dexcom or FreeStyle Libre are not covered by Part B for most people. Medicare has not added them to the list of covered supplies, though this may change. Some people with insulin-dependent diabetes have obtained coverage through an appeal or exception, but this is not standard.

Lancets and lancing devices are covered, but only in quantities that Medicare considers reasonable — typically one lancing device per year and lancets based on how often your doctor says you need to test. If you test more frequently than Medicare's standard, you may have to pay for extra lancets yourself.

How to get your doctor's order and find a Medicare supplier

You cannot walk into a pharmacy, buy diabetes supplies, and send the receipt to Medicare for reimbursement. You need a written order from your doctor that says you have diabetes and need these supplies. The order does not have to be lengthy — it can be a straightforward note that says "Patient has diabetes; needs blood glucose monitor, test strips, and lancets for home monitoring."

Once you have the order, you must buy the supplies from a Medicare-approved supplier. These are companies that have signed an agreement with Medicare to bill the program directly. You can find approved suppliers by visiting the Medicare Supplier Directory at dmepos.cms.gov or by calling Medicare at 1-800-MEDICARE. Search by your ZIP code and the type of supply you need.

When you order from an approved supplier, give them your Medicare number and your doctor's order. The supplier bills Medicare directly. You pay your share (usually 20 percent of the Medicare-approved amount after you meet your deductible) and the supplier handles the rest. If you use a supplier that is not Medicare-approved, Medicare will not pay, and you will owe the full cost.

What you pay: deductibles and coinsurance

Your out-of-pocket cost depends on whether you have met your Part B deductible for the year. The deductible amount changes each year; you can find the current amount on your Medicare card or by calling 1-800-MEDICARE. Once you meet the deductible, you pay 20 percent of the Medicare-approved amount for diabetes supplies.

The Medicare-approved amount is not the same as the supplier's list price. Medicare sets the approved amount for each type of supply. If a supplier charges more than the approved amount, you are responsible only for 20 percent of the approved amount, not 20 percent of what they charged. This is why using a Medicare-approved supplier matters — they know the approved amounts and bill accordingly.

If your supplier accepts Medicare assignment, they agree not to charge you more than your 20 percent coinsurance. If they do not accept assignment, they can charge you more, and you may have to pay the difference out of pocket. Always ask whether a supplier accepts Medicare assignment before you place an order.

How often Medicare covers refills

Medicare limits how often you can get new supplies. For test strips and lancets, the limit is typically based on how often your doctor says you need to test. If your doctor writes an order for daily testing, Medicare will cover strips and lancets for daily use. If your doctor says you test twice a day, Medicare covers supplies for twice-daily testing.

For blood glucose monitors, Medicare typically covers one monitor per year. If your monitor breaks or stops working, you may be able to get a replacement, but you will need your doctor to document that the first one is no longer functional.

Suppliers are required to space out refills — you cannot order three months' worth of supplies all at once. If you need supplies sooner than Medicare's schedule allows, you will have to pay out of pocket for the extra supplies.

Common mistakes that cost you money

The most common mistake is buying supplies from a pharmacy or online retailer without checking whether they are a Medicare-approved supplier. You may think you are saving money by using a familiar pharmacy, but if they are not approved, Medicare will not pay anything, and you will owe the full cost.

Another mistake is not getting a written order from your doctor before you buy supplies. Medicare requires a doctor's order. A verbal conversation with your doctor is not enough — you need something in writing that you can give to the supplier.

A third mistake is not asking about the Medicare-approved amount before you order. If a supplier quotes you a price that seems very high, ask them what the Medicare-approved amount is. If they cannot tell you or if their price is much higher than the approved amount, find a different supplier.

Finally, do not assume that because one supply is covered, all similar supplies are covered. For example, lancets are covered, but some specialty lancets or lancing devices may not be. Always confirm with your supplier or Medicare before you order.

Frequently Asked Questions

Does Medicare Part B cover continuous glucose monitors?

Not routinely. Medicare has not added CGMs to the standard list of covered supplies. Some people with insulin-dependent diabetes have obtained coverage through an appeal, but this requires documentation that other methods of glucose monitoring are not medically appropriate. Contact your doctor and your CGM manufacturer to ask about the appeal process if you believe you have a medical reason for coverage.

What if my doctor says I need to test more often than Medicare allows?

You can pay out of pocket for extra strips and lancets beyond what Medicare covers. Some suppliers offer discounts if you buy additional supplies yourself. You can also ask your doctor to submit a request to Medicare explaining why you need more frequent testing; Medicare may approve additional supplies if the medical reason is documented.

Can I use my Part D plan to cover test strips instead of Part B?

No. Test strips are covered under Part B, not Part D. Your Part D plan covers insulin and insulin-related items like syringes and pen needles, but not glucose monitors or test strips. You must use Part B for those supplies.

What happens if I switch Medicare suppliers?

You can switch suppliers at any time. Give your new supplier your Medicare number and your doctor's order, and they will handle the billing. Your old supplier will stop sending supplies. There is no penalty for switching, and you do not need Medicare's permission.

Do I need to pay anything upfront when I order from a Medicare-approved supplier?

Not usually. A Medicare-approved supplier that accepts assignment will bill Medicare directly and ask you to pay only your coinsurance (20 percent after your deductible). If a supplier asks for full payment upfront, they may not be Medicare-approved, or they may not accept assignment. Always confirm the billing arrangement before you place an order.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.