What Diabetic Supplies Medicare Part B Covers

Medicare Part B covers some diabetic supplies, but not all of them

Medicare Part B pays for blood glucose monitors, test strips, lancets, and certain other supplies if you have diabetes and meet specific conditions. The program does not cover insulin, syringes, or pen needles — those fall under Part D (prescription drug coverage) or Part B in limited cases. What you pay depends on whether you see a participating provider, whether you have met your deductible, and which specific item you need.

The rules are detailed and vary by supply type. Understanding what is covered before you order can save you from unexpected bills and help you plan which coverage to use.

Key Takeaways

Medicare Part B covers blood glucose monitors, test strips, and lancets for people with diabetes who meet medical necessity requirements.
You must get these supplies from a Medicare-enrolled supplier and have a prescription or order from your doctor.
Insulin is covered under Part D (prescription drug plans) or sometimes Part B if given in a clinical setting, but never under Part B for home use.
You pay 20 percent of the Medicare-approved amount after you meet your Part B deductible, unless your plan offers additional coverage.
Continuous glucose monitors (CGMs) are covered for people on insulin, but coverage rules and costs vary by model and your specific plan.

Blood glucose monitors and test strips

Medicare Part B covers a blood glucose monitor and test strips if your doctor orders them and you have diabetes that requires daily monitoring. You must obtain them from a Medicare-enrolled durable medical equipment (DME) supplier, not from a pharmacy or retail store. You can find enrolled suppliers by calling 1-800-MEDICARE or searching the Medicare provider directory online.

After you meet your Part B deductible (which is $240 in 2024, though this amount changes yearly), you pay 20 percent of the Medicare-approved amount for the monitor and each box of test strips. The supplier bills Medicare directly if they are enrolled. If you use a non-enrolled supplier, you may have to pay the full cost upfront and request reimbursement yourself — a slower and riskier process.

Medicare limits the number of test strips you can receive per month based on how often your doctor says you need to test. If you test once daily, you may receive one box per month; if you test multiple times daily, the limit is higher. Your supplier should know these limits and will not dispense beyond them without prior authorization from Medicare.

Lancets and lancing devices

Lancets (the small needles used to prick your finger) and lancing devices are covered under Part B when prescribed by your doctor. Like test strips, they must come from a Medicare-enrolled DME supplier. You pay 20 percent of the approved amount after your deductible.

Medicare also limits lancets to a certain number per month — typically matching the number of test strips you are authorized to use. If your doctor prescribes more frequent testing, ask them to document the medical reason so Medicare will approve a higher quantity.

Continuous glucose monitors (CGMs)

Continuous glucose monitors are covered by Medicare Part B if you have diabetes and use insulin. The most common covered models include the Dexcom G6, Freestyle Libre, and Medtronic Guardian, though coverage can change and varies by plan. You need a prescription from your doctor stating that you use insulin and that a CGM is medically necessary.

Like other DME, you must order from a Medicare-enrolled supplier. You pay 20 percent of the approved amount after your deductible. Some CGM manufacturers offer patient information programs that can reduce or eliminate your out-of-pocket cost, so ask your supplier or the manufacturer whether you may have access to.

Coverage rules for CGMs are more complex than for basic monitors because they involve both the device itself and the sensors you replace regularly. Ask your supplier to confirm what your specific plan covers before you order, because some plans cover the reader device but not the sensors, or cover only certain models.

Insulin and insulin delivery supplies

Insulin is not covered by Medicare Part B for home use. Instead, it is covered under Part D (prescription drug coverage) if you have a Part D plan, or under a Medicare Advantage plan if that is what you chose. You pay whatever your plan's formulary and cost-sharing rules require — this varies widely by plan and by insulin type.

Insulin syringes and pen needles are also covered under Part D, not Part B. If you use an insulin pump, the pump itself may be covered as DME under Part B, but the insulin cartridges and infusion sets are covered under Part D.

If you do not have Part D coverage, you can enroll during the annual enrollment period (October 15 to December 7) or during a special enrollment period if you have a may have access to life event. If you cannot afford your insulin, ask your doctor about patient information programs run by insulin manufacturers — many offer free or reduced-cost insulin regardless of income.

What you pay: deductibles and coinsurance

For all Part B diabetic supplies, you pay your Part B deductible first. Once you have met it, you pay 20 percent of the Medicare-approved amount for each item. If you have a Medigap or Medicare Advantage plan, your supplemental coverage may pay some or all of that 20 percent, so check your plan documents or call your plan to confirm.

The Medicare-approved amount is not the same as the supplier's list price. Medicare sets its own approved amount for each supply type, and suppliers must accept that amount as payment in full if they are enrolled. This means you never owe the difference between what the supplier charges and what Medicare approves — that is a key protection of using an enrolled supplier.

If you use a non-enrolled supplier, you may be billed for the full amount and have to request reimbursement from Medicare yourself. This is slower and you may not receive the full amount back.

How to order diabetic supplies through Medicare

Start by asking your doctor for a written order or prescription for the specific supplies you need. The order should include the quantity per month and how long the order is valid (usually one year). Your doctor can send this directly to a supplier or give it to you to deliver yourself.

Next, contact a Medicare-enrolled DME supplier. You can find one by:

Calling 1-800-MEDICARE and asking for a list of enrolled suppliers in your area
Searching the Medicare provider directory at Medicare.gov
Asking your doctor which suppliers they work with

Give the supplier your doctor's order, your Medicare number, and your contact information. They will verify your coverage, confirm what you owe, and arrange delivery. Most suppliers ship supplies to your home. Ask whether they offer automatic refills so you do not run out.

Keep copies of your doctor's order and any paperwork the supplier gives you. If Medicare denies a claim or you receive a bill you think is wrong, you will need these documents to appeal.

Frequently Asked Questions

Does Medicare Part B cover glucose tablets or other diabetes treatments?

No. Part B covers only the supplies used to monitor blood sugar — monitors, test strips, lancets, and CGMs. It does not cover glucose tablets, insulin, medications, or other treatments. Medications and treatments are covered under Part D or Part B depending on how they are administered.

What if my doctor prescribes more test strips than Medicare's monthly limit?

Your doctor can request a higher limit by submitting documentation to Medicare explaining the medical reason — for example, if you have frequent low blood sugar episodes or are adjusting your insulin dose. The supplier can help submit this request. Medicare will review it and approve or deny the higher quantity.

Can I use my Part B coverage at a pharmacy instead of ordering from a DME supplier?

No. Medicare Part B diabetic supplies must come from a Medicare-enrolled DME supplier. Pharmacies do not bill Medicare Part B for these items. If you buy them at a pharmacy, you pay the full retail price and cannot request reimbursement from Medicare.

Do I need prior authorization before ordering diabetic supplies?

For basic monitors, test strips, and lancets, you usually do not need prior authorization — your doctor's order is enough. For continuous glucose monitors, some plans require prior authorization before you order. Ask your supplier to check with your plan before you place an order so there are no delays.

What happens if I switch Medicare plans — do I have to get new supplies?

Not necessarily. Your existing supplies remain yours. However, your new plan's coverage rules may differ, and you may need to switch to a different supplier or CGM model if your new plan does not cover your current one. Contact your new plan before your coverage starts to understand what suppliers and models they cover.

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.