Medicare Diabetes Supplies Coverage: Test Strips, CGMs, Insulin and What You Pay

Medicare splits diabetes supplies between two parts, and the line between them decides what you pay. Your meter, test strips, lancets, a continuous glucose monitor and a traditional insulin pump fall under Part B: 20% of the Medicare-approved amount after the $283 deductible (the 2026 figure). Insulin pens, syringes, needles and alcohol swabs fall under Part D, or under nothing if you don't have drug coverage. And insulin itself is capped at $35 for a month's supply of each covered product, under either part.

Three things commonly drive a surprise bill: the item sat on the other side of that line, the supplier didn't accept assignment, or the prescription had lapsed. Here's how each piece works, with the quantity limits, the coverage rules for glucose monitors, and what's different for Floridians.

Source: Medicare.gov, Insulin; CMS 2026 Parts A and B fact sheet; CMS CY 2027 Rate Announcement; Medicare.gov, Blood sugar test strips.

Which part pays for what

Medicare treats a glucose meter and its supplies as durable medical equipment (DME), which is a Part B benefit. Drugs and the disposable things you inject them with are Part D. The CMS diabetes booklet (Product No. 11022, July 2026) lays it out, and the table below follows it.

Source: CMS booklet 11022, pp. 5-10 and 16; Medicare.gov, Insulin.

The row that catches people is syringes. Part B doesn't cover insulin pens or insulin-related supplies. If you have Part B but no Part D, Medicare.gov says plainly that you'll pay all of the cost of syringes, needles, swabs and gauze (Medicare.gov, Insulin). That's one more reason people with diabetes should think hard before going without drug coverage.

This table is for Original Medicare. If you're in a Medicare Advantage plan, the plan sets its own cost sharing and may require you to use in-network providers and suppliers, so check your plan's Evidence of Coverage for your share.

Test strips and lancets: the quantity limits

The limits are set per three months, not per month, and they turn on one question: do you use insulin? It doesn't matter whether your diagnosis is type 1 or type 2. The coverage rule for glucose monitors, Local Coverage Determination L33822, says so explicitly.

Source: CMS booklet 11022, p. 6; LCD L33822, Glucose Monitors. "About per day" is our arithmetic over a 90-day quarter, not a Medicare rule.

Going over the usual amount is allowed, but it takes paperwork. Under L33822, your treating practitioner needs an in-person or Medicare-approved telehealth visit with you in the six months before ordering the higher quantity, to look at your diabetes control and your need for the extra supplies. Then, every six months, the practitioner has to verify that you're actually testing at that higher rate. The booklet adds that you may need to keep a record of how often you test.

So keep the log. If your meter stores readings, that's your record. If the supplier's claim gets denied for quantity, a log and a recent visit note are the records that support an appeal.

Continuous glucose monitors: who qualifies

Part B may cover a continuous glucose monitor (CGM) and its sensors if you have diabetes and either take insulin or have a history of problems with low blood sugar. You or a caregiver also need enough training to use it, and your provider has to evaluate you before ordering it (Medicare.gov, Continuous glucose monitors).

The fine print in L33822 is more specific than the Medicare.gov summary:

• Insulin-treated counts on its own. The rule doesn't set a minimum number of daily injections.
• Problematic hypoglycemia means either more than one level 2 event (glucose under 54 mg/dL) that keeps happening despite more than one attempt to adjust your medications or treatment plan, or one level 3 event (glucose under 54 mg/dL with an altered mental or physical state that needed someone else's help).
• A visit within six months before the order, in person or by Medicare-approved telehealth, where the practitioner confirms you meet the criteria.
• A follow-up visit every six months after that to document that you're using the CGM and following your treatment plan.

That last point is the one people drop. Miss the six-month visits and the supplier may not be able to keep billing for sensors. If you're on a CGM, put the next visit on the calendar before you leave the office.

What about people with type 2 diabetes who don't use insulin and haven't had serious lows? Under the current rule, they don't qualify. As of today, the CMS coverage database shows no proposed change to L33822 open for comment. If that changes, this post will be updated.

Insulin, pumps and the $35 cap

The cap is simple to state: no more than $35 for a one-month supply of each Part B- or Part D-covered insulin product, and no deductible on insulin. A three-month supply is generally no more than $105 (Medicare.gov, Insulin). Under Part D, the cap applies to everyone who takes insulin, including people with Extra Help, who may pay less (booklet 11022, p. 10; see Extra Help in Florida).

Two details matter:

It's per product. If you use a long-acting insulin and a rapid-acting insulin, that's two products and up to $70 a month. The cap doesn't combine them.

It covers insulin, not the supplies. Syringes, pen needles and swabs are billed under your Part D plan's normal cost sharing. The $35 limit doesn't apply to them.

Pumps split along a different line. A durable external pump (the kind you keep and refill) is Part B DME, and Part B also covers the insulin used in it, with the same $35 monthly limit. Other pumps, like disposable patch pumps you change every two to three days and certain reusable pumps that use disposable insulin cartridges, aren't covered as Part B equipment. A Part D plan may cover certain disposable pumps, and Part D may cover the insulin used with these pumps (capped at $35 a month); the pump itself may cost more than $35 (booklet 11022, pp. 6 and 10). If you have a Medigap policy that pays your Part B coinsurance, Medicare.gov says it should cover your cost ($35 or less) for pump insulin under Part B.

$0$1,000$2,000$3,000

$2,000

$2,100

$2,400

202520262027

Source: CMS CY 2026 Rate Announcement; CMS CY 2027 Rate Announcement

Show the numbers

	Out-of-pocket threshold
2025	$2,000
2026	$2,100
2027	$2,400

The out-of-pocket cap matters more for diabetes than for most conditions, because some diabetes drugs are expensive brand-name products. Medicare is negotiating prices on certain high-cost brand-name drugs, including some that treat diabetes, with the next round of negotiated Part D prices taking effect January 1, 2027 (booklet 11022, p. 9). In 2026, once what you pay for covered Part D drugs hits $2,100 (including certain payments made for you, like Extra Help), you reach catastrophic coverage and pay nothing more for covered Part D drugs for the rest of the year. For 2027 the cap is $2,400, and no plan's deductible can exceed $700 (up from $615) (Medicare.gov, Part D costs). Insulin has no deductible either way. I covered the 2027 numbers in more detail in Part D changes for 2027.

What you actually pay: two examples

Both examples below are hypothetical. The Medicare-approved amounts are made up to keep the math readable; real amounts depend on the item, your supplier and Medicare's fee schedule.

Example 1: test strips with Original Medicare and no Medigap. Say you don't use insulin, you order a three-month supply of strips and lancets four times a year, and each order has a Medicare-approved amount of $150. Say nothing else is billed to Part B all year (unusual, since doctor visits also count toward the deductible, but it shows how the deductible works).

Hypothetical example. Rules from Medicare.gov, Blood sugar test strips; deductible from CMS 2026 fact sheet.

The first order is all yours because it's entirely inside the $283 deductible. The second finishes off the deductible ($133) and you pay 20% of the remaining $17. After that, it's 20% of each order. That math assumes the supplier accepts assignment. If it doesn't, it can charge more, and you may pay the whole bill at the counter and wait for Medicare to reimburse its share.

Example 2: insulin under Part D. Say you use two insulin products, each filled as a one-month supply. The most you can be charged is $35 per product, so $70 a month, or $840 over a full year, with no deductible. Your syringes or pen needles are on top of that, at your plan's cost sharing. If your plan charges less than $35 for an insulin, you pay the lower amount.

Prescriptions, refills and suppliers

Medicare covers meters and testing supplies only with a prescription. Per the booklet, it should say:

• that you have diabetes;
• what kind of meter you need and why (if you need a special meter because of vision problems, your doctor has to explain that);
• whether you use insulin;
• how often you should test; and
• how many test strips and lancets you need for one month.

Two rules trip people up. First, the prescription for strips and lancets has to be renewed every 12 months. Second, you have to ask for refills yourself. Medicare won't pay for supplies you didn't request, or supplies a company ships automatically, including meters, strips and lancets. If a box shows up that you didn't order, don't assume Medicare will pay for it, and call 1-800-MEDICARE.

You can fill the prescription at a pharmacy or through a medical equipment supplier, including mail order (you'll need to call to place each order). Before you do, ask two questions:

1. Do you participate in Medicare?
2. Do you accept assignment?

A participating supplier must accept assignment, which means it takes the Medicare-approved amount as full payment, charges you only the deductible and 20% coinsurance, and submits the claim for you without a fee. A supplier that doesn't accept assignment can charge more, and Medicare.gov notes the limiting charge that caps some doctors' bills doesn't apply to some supplies and equipment (Medicare.gov, assignment). A supplier that isn't enrolled in Medicare at all can't get paid by Medicare, so you'd owe everything. You can search enrolled suppliers at Medicare.gov/medical-equipment-suppliers. The same rules apply to all DME; see how Medicare handles durable medical equipment for rentals, repairs and replacement.

Therapeutic shoes and inserts

If you have diabetes and severe diabetes-related foot disease, Part B covers one of these each calendar year:

• one pair of depth-inlay (extra-depth) shoes and 3 pairs of inserts; or
• one pair of custom-molded shoes, including inserts, if a foot deformity means you can't wear depth-inlay shoes, plus 2 more pairs of inserts.

The doctor who treats your diabetes has to certify three things: that you have diabetes; that you have at least one qualifying foot condition (a foot deformity, calluses that could lead to ulcers, nerve damage with signs of callus problems, a partial or complete foot amputation, past foot ulcers, or poor circulation); and that you're being treated under a comprehensive diabetes care plan and need the shoes because of diabetes. A podiatrist or other qualified provider prescribes them, and a pedorthist, orthotist, prosthetist or doctor fits them (booklet 11022, p. 8).

Ask the shoe supplier the same assignment question. Medicare.gov's page on therapeutic shoes is blunt: if a supplier doesn't participate and doesn't accept assignment, there's no limit on what it can charge you.

Training, nutrition therapy and prevention

Supplies are half the benefit. Part B also pays for services that are underused, partly because a doctor has to order most of them.

Source: Medicare.gov pages on self-management training, medical nutrition therapy, the Diabetes Prevention Program and diabetes screenings; CMS booklet 11022, pp. 12-15; glaucoma screenings.

A few details from the booklet worth knowing. The initial self-management training has to be finished within 12 months of starting it. Your provider can order all 10 hours as one-on-one training if you have low vision, a hearing impairment, a language or other communication barrier, cognitive limitations, or if no group class is available within two months of the order. Training at a Federally Qualified Health Center doesn't carry the Part B deductible. And if you have diabetes-related nerve damage in your lower legs that raises the risk of limb loss, Part B covers a foot exam by a podiatrist or other foot care specialist every 6 months, as long as you haven't seen a foot care professional for another reason in between.

The Diabetes Prevention Program is for people who don't have diabetes yet. You qualify with an A1C between 5.7% and 6.4%, a fasting plasma glucose of 110 to 125 mg/dL, or a two-hour glucose tolerance result of 140 to 199 mg/dL within the 12 months before your first session (Medicare.gov). Through December 31, 2029, you can attend in person, live online, self-paced online, or a mix. There's no limit on how many times you can take part. The full list of no-cost screenings is in Medicare preventive services.

Florida: hurricanes, fraud and 2028 changes

Hurricanes. If Original Medicare already paid for equipment like a traditional insulin pump, or for diabetes supplies, and they're lost or damaged in a declared emergency or disaster, Medicare will in certain cases cover the cost to repair or replace them (booklet 11022, p. 8). The rules are at Medicare.gov/providers-services/disaster-emergency. Before storm season, I'd keep your prescription details, supplier's phone number and Medicare card in the same waterproof bag as your supplies. Replacement goes faster when you can show what you had and who supplied it.

Supplies you didn't order. If a company calls offering a meter you never asked for, or a box of strips arrives unannounced, say no and don't sign for it. Medicare won't pay for supplies you didn't request, and the booklet tells you to report misleading ads, automatic shipments and suspected fraud to 1-800-MEDICARE. In Florida, SHINE also runs the state's Senior Medicare Patrol, which helps people spot and report suspected Medicare fraud: 1-800-963-5337 (SMP Resource Center). Read every Medicare Summary Notice and look for strips, sensors or braces you never received.

CGMs and insulin pumps in 2028. CMS is bringing CGMs and insulin pumps into its competitive bidding program in Round 2028, run as one nationwide remote item delivery program. The target start is January 1, 2028, with contract suppliers to be announced in late summer or early fall of 2027 (CMS bidding timeline). Under the CMS plan, those items would be paid as a continuous monthly rental with supplies included; if you already own a CGM or pump, you can keep using it until it needs replacing; and contract suppliers must furnish the brand your doctor ordered (CMS fact sheet). Contract suppliers ship to your home and may also offer pickup at a local pharmacy or storefront (CMS bidding area). Until then, today's rules apply.

Where to get help

For a denied supply claim or a question about which part covers an item, start with 1-800-MEDICARE (1-800-633-4227; TTY 1-877-486-2048). For one-on-one help comparing your drug coverage for the insulin and diabetes drugs you take, Florida's SHINE program offers unbiased counseling through trained volunteers at no charge: 1-800-96-ELDER (1-800-963-5337), TDD/TTY 1-800-955-8770 (SHINE contact page). There's more on how SHINE works.

If you're weighing coverage options, the background pages on Medicare in Florida, Medicare Part D in Florida and Medicare Supplement (Medigap) in Florida explain how the pieces fit. The practical checklist for anyone with diabetes on Medicare is short: confirm the supplier participates and accepts assignment, renew the strip prescription every 12 months, keep a testing log if you're over the usual quantity, keep the six-month visits if you use a CGM, and make sure your Part D formulary lists every insulin and diabetes drug you take.

Your own coverage documents and Medicare's rules control. Confirm your situation with a licensed agent, 1-800-MEDICARE, or SHINE before you act on anything here.

Sources

1. CMS: Medicare Coverage of Diabetes Supplies, Services & Prevention Programs (Product No. 11022, July 2026)
2. Medicare.gov: Blood sugar monitors
3. Medicare.gov: Blood sugar test strips
4. Medicare.gov: Continuous glucose monitors
5. Medicare.gov: Insulin
6. Medicare.gov: Therapeutic shoes & inserts
7. Medicare.gov: Diabetes self-management training
8. Medicare.gov: Medical nutrition therapy services
9. Medicare.gov: Medicare Diabetes Prevention Program
10. Medicare.gov: Diabetes screenings
11. Medicare.gov: Glaucoma screenings
12. Medicare.gov: Medicare Savings Programs
13. CMS Medicare Coverage Database: LCD L33822, Glucose Monitors
14. CMS: 2026 Medicare Parts A & B premiums and deductibles fact sheet
15. CMS: CY 2026 Medicare Advantage and Part D Rate Announcement
16. CMS: CY 2027 Medicare Advantage and Part D Rate Announcement
17. Medicare.gov: Costs in the coverage stages (Part D)
18. Medicare.gov: Does your provider accept Medicare as full payment?
19. CMS: DMEPOS Competitive Bidding Program updates fact sheet
20. CMS Competitive Bidding Implementation Contractor: Round 2028 timeline
21. CMS Competitive Bidding Implementation Contractor: Round 2028 competitive bidding area
22. SHINE, Florida Department of Elder Affairs
23. SHINE: Contact us
24. SMP Resource Center: Florida