Medicare covers some diabetes supplies, but not all, and coverage depends on which part of Medicare you have and whether your doctor writes an order

Medicare Part B covers blood glucose monitors, test strips, lancets, and lancing devices if your doctor writes an order saying you need them to manage diabetes. Part B also covers insulin pumps and continuous glucose monitors (CGMs) under specific conditions. However, Medicare does not cover insulin itself through Part B — that coverage comes through Part D (prescription drug plans) or Part B in limited cases. The rules are strict about what counts as medically necessary, and supplies ordered without a doctor's written order will not be covered.

Coverage also depends on where you get your supplies. Medicare pays for items dispensed by a Durable Medical Equipment (DME) supplier that is enrolled with Medicare. If you buy supplies at a pharmacy or online without going through a DME supplier, Medicare will not pay, even if the item itself is covered. This is one of the most common reasons claims are denied.

Key Takeaways

  • Medicare Part B covers blood glucose test strips, lancets, monitors, and lancing devices only when your doctor writes an order stating medical necessity.
  • Insulin pumps and continuous glucose monitors are covered under Part B, but you must use an enrolled DME supplier and meet specific clinical criteria your doctor must document.
  • Insulin is covered through Part D (prescription drug plans) or, in rare cases, through Part B if given in a hospital or doctor's office setting.
  • Buying supplies without a doctor's order or from a non-enrolled supplier will result in no Medicare payment, even if the item is otherwise covered.
  • You typically pay 20 percent coinsurance after you meet your Part B deductible, though some DME suppliers offer plans that let you pay a flat monthly fee instead.

What Medicare Part B Covers for Diabetes

Medicare Part B covers blood glucose monitors, test strips, lancets, and lancing devices as durable medical equipment. Your doctor must write an order that includes a diagnosis of diabetes and a statement that the items are medically necessary. The order does not need to be a formal prescription — a note in your medical record that your doctor signs counts. Without this order, Medicare will deny the claim.

The monitor itself is typically covered once per lifetime, meaning Medicare pays for one device. Test strips and lancets are covered as ongoing supplies. The exact number of strips covered per month varies based on your doctor's order and your specific situation — someone on insulin may be approved for more strips per day than someone managing diabetes with diet alone. Your DME supplier will submit the order to Medicare and tell you how many strips per month are approved.

Continuous glucose monitors (CGMs) such as Dexcom, FreeStyle Libre, and Medtronic Guardian are covered under Part B if your doctor documents that you meet specific clinical criteria. Generally, you must be on insulin and have a medical reason for continuous monitoring — such as frequent low blood sugar episodes or difficulty recognizing low blood sugar. Your doctor must submit the clinical justification along with the order. Coverage includes the sensor and transmitter but not always the receiver or reader device, depending on the brand and your specific plan.

Insulin Pumps and When They Are Covered

Insulin pumps are covered under Medicare Part B as durable medical equipment. Your doctor must document that you have type 1 diabetes or type 2 diabetes requiring insulin, and that you have tried insulin injections and either had poor control or experienced significant side effects. Some doctors also document that you have hypoglycemia unawareness (inability to feel low blood sugar coming on), which strengthens the case for a pump.

The pump device itself is covered, as are infusion sets and reservoirs (the supplies that hold and deliver the insulin). Your doctor's order must go to an enrolled DME supplier, who will work with the pump manufacturer to verify coverage before you receive the device. This process typically takes two to four weeks. You will pay 20 percent coinsurance after your Part B deductible, though some pump manufacturers offer patient information programs that reduce or eliminate your out-of-pocket cost.

If your pump order is denied, the most common reason is that your doctor did not document a prior trial of insulin injections or did not explain why injections did not work for you. Ask your doctor to add this information and resubmit. Appeals are common and often successful when the clinical justification is clear.

How Insulin Is Covered Under Medicare

Insulin is not covered as a supply under Part B. Instead, it is covered as a prescription drug through Part D (prescription drug plans) if you are enrolled in one. If you have Original Medicare (Part A and Part B only) without a Part D plan, you will pay the full cost of insulin out of pocket unless you are in a hospital or doctor's office, where it may be covered under Part B as an injectable drug administered by a provider.

If you have a Medicare Advantage plan (Part C), insulin coverage depends on your specific plan. Most Medicare Advantage plans include prescription drug coverage, but the formulary (list of covered drugs) and copays vary widely. Check your plan's formulary or call the plan to confirm which insulins are covered and what you will pay.

Some people may have access to for the Extra Help program (also called Low-Income Subsidy), which reduces Part D premiums and copays for insulin and other drugs. You can check whether you may have access to by calling 1-800-MEDICARE or visiting Medicare.gov. If your Part D plan's insulin copay is very high, you may be able to switch to a different Part D plan during the annual enrollment period (October 15 to December 7) that offers lower copays for your specific insulin.

Using a Durable Medical Equipment Supplier

To get Medicare coverage for diabetes supplies, you must use a DME supplier that is enrolled with Medicare. Your doctor can refer you to a specific supplier, or you can search for enrolled suppliers in your area on Medicare.gov using the "Supplier Directory" tool. Not all pharmacies are enrolled DME suppliers, and not all DME suppliers stock all brands of supplies.

Once you choose a supplier, give them your doctor's order. The supplier will verify your Medicare coverage, check your deductible status, and tell you what you will owe. They will submit the claim to Medicare on your behalf. If Medicare denies the claim, the supplier should tell you why and help you understand whether an appeal is possible.

Some DME suppliers offer flat monthly rental or supply fees instead of per-item copays. For example, instead of paying 20 percent coinsurance on each box of test strips, you might pay a flat $15 per month for unlimited strips. These plans are legal and can save money if you use a lot of supplies. Ask your supplier whether they offer this option.

What You Will Pay Out of Pocket

Under Original Medicare Part B, you pay 20 percent coinsurance for diabetes supplies after you meet your annual Part B deductible (which is $240 in 2024, though this amount changes yearly). For example, if your blood glucose monitor costs $100, you pay $20 after the deductible is met. Once you reach your out-of-pocket maximum for the year, Medicare covers 100 percent of covered supplies for the rest of the year.

If you have a Medicare Advantage plan, your copays and coinsurance for diabetes supplies depend on your specific plan. Some plans cover test strips and lancets with no copay; others charge a copay per box or per month. Check your plan documents or call your plan to find out what you will pay.

If you have Part D coverage for insulin, your copay depends on your plan's formulary tier for that specific insulin. Insulin is often on a higher tier, meaning higher copays. Once you and your plan spend a combined total of $7,050 on covered drugs in 2024 (this amount changes yearly), you enter the "coverage gap" and pay more out of pocket until you reach your plan's out-of-pocket maximum. Some plans offer copay information programs or manufacturer coupons that can reduce your cost.

Common Reasons Claims Are Denied

Medicare denies diabetes supply claims most often because there is no doctor's order on file, the order is incomplete or outdated, or the supplies were purchased from a non-enrolled supplier. If your claim is denied, ask your supplier or doctor's office for the specific reason. The denial notice from Medicare will include a code that explains why.

Other common denial reasons include: the doctor did not document medical necessity clearly enough; the quantity of supplies ordered exceeds what Medicare considers reasonable for your situation; or the item itself is not on Medicare's covered list (for example, some brands of lancets or certain types of glucose monitors). If you believe the denial is wrong, you have the right to appeal. Your supplier or doctor can help you file an appeal, and many appeals are successful when the clinical documentation is strengthened.

Supplies ordered without a doctor's order will never be covered, even if you later get a doctor to sign off. Medicare requires the order to be in place before the supplies are dispensed. If you have already paid out of pocket for supplies, you cannot go back and ask Medicare to reimburse you retroactively.

Frequently Asked Questions

Does Medicare cover glucose tablets or other fast-acting carbohydrates for low blood sugar?

No. Glucose tablets, juice, candy, and other foods or supplements used to treat low blood sugar are not covered by Medicare. These are considered over-the-counter items or food, not medical equipment. You pay for them out of pocket.

Will Medicare cover a continuous glucose monitor if I do not take insulin?

It depends. Medicare's policy requires that you be on insulin to may have access to for a CGM. However, some people with type 2 diabetes who take certain medications (such as GLP-1 agonists) have had CGMs covered after their doctor documented medical necessity. Ask your doctor whether your situation might may have access to and have them submit a detailed clinical justification if you want to pursue coverage.

Can I switch DME suppliers if I am not happy with the one I am using?

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

What happens to my diabetes supply coverage if I switch from Original Medicare to a Medicare Advantage plan?

Coverage changes depending on your new plan. Most Medicare Advantage plans cover test strips, lancets, and monitors, but copays and the number of supplies covered per month may differ from Original Medicare. Check your new plan's formulary and coverage details before you switch, and ask whether your current DME supplier is in the plan's network. Some suppliers work with multiple plans; others do not.

If I have both Medicare and Medicaid, which one pays for my diabetes supplies?

Medicare is the primary payer, meaning it pays first. Medicaid covers what Medicare does not cover, up to what Medicaid allows. Your DME supplier will bill Medicare first, then bill Medicaid for any remaining balance. You should not have to do anything — the supplier handles the coordination. Tell your supplier that you have both Medicare and Medicaid so they bill correctly.