Medicare Diabetes Coverage: What's Covered and What It Costs in 2026

What diabetes care does Medicare cover?

Medicare's diabetes coverage is split between two parts, and knowing which part pays for what is the key to avoiding surprise bills. Part B (medical insurance) covers most diabetes equipment, supplies, and in-office services. Part D (prescription drug coverage) covers the medicines you pick up at the pharmacy, including insulin and pills like metformin.

The general rule of thumb: equipment and services billed by a doctor or medical supplier go through Part B, and prescriptions filled at a pharmacy go through Part D. There is one important exception — insulin used inside an insulin pump is covered under Part B, not Part D.

• Part B (medical): blood sugar monitors, test strips, lancets, continuous glucose monitors (CGMs), insulin pumps, therapeutic shoes, foot exams, eye exams, screenings, and education/nutrition counseling.
• Part D (drugs): insulin you inject or inhale, non-insulin diabetes drugs (metformin, other oral medications, GLP-1s prescribed for diabetes), plus syringes, needles, alcohol swabs, and gauze when not used with a pump.
• Part B exception: insulin used in a Part B-covered insulin pump is paid under Part B.

How much does insulin cost in 2026?

Your cost-sharing for a one-month supply of each covered insulin product is capped at $35, and the Part D deductible does not apply to insulin. That means you pay the capped amount from your very first fill. For a three-month supply, you pay no more than $35 for each month's supply — generally no more than $105 total.

For 2026, the cap is technically the lesser of $35, 25% of the maximum fair price under the federal Drug Price Negotiation Program, or 25% of your plan's negotiated price. In plain terms: your share can be under $35, but it will never be more than $35 for a covered insulin.

Insulin used in a Part B-covered insulin pump is also capped at $35 per month, and the Part B deductible does not apply to that insulin either. The pump itself is treated as durable medical equipment (DME) under Part B — after you meet the $283 Part B deductible, you pay 20% of the Medicare-approved amount for the device.

• $35 maximum per month for each covered insulin (often less); no deductible applies.
• Three-month supply: no more than $35 per month, generally no more than $105 total.
• Pump insulin: $35/month cap, no Part B deductible on the insulin.
• Insulin pump device: 20% coinsurance after the $283 Part B deductible (Part B DME).

CGMs, monitors, test strips, and lancets

Continuous glucose monitors (CGMs) are covered under Part B as durable medical equipment. After you meet the Part B deductible, you pay 20% of the Medicare-approved amount. To qualify for a Medicare-covered CGM, you must take insulin or have a history of problems with low blood sugar (hypoglycemia), and you or your caregiver must be trained to use the device.

Standard blood sugar monitors, test strips, and lancets are also covered under Part B as DME — 20% coinsurance after the deductible, as long as the supplier accepts assignment (agrees to Medicare's approved amount). How many supplies you can get depends on whether you use insulin.

Note that insulin-related supplies such as syringes, needles, alcohol swabs, and gauze are not covered by Part B unless they are used with a pump. Otherwise, those supplies fall under your Part D drug coverage.

• CGM: 20% coinsurance after the $283 Part B deductible (Part B DME).
• CGM eligibility: insulin use OR a history of hypoglycemia, plus required training.
• Insulin users: up to 300 test strips and 300 lancets every 3 months.
• Non-insulin users: up to 100 test strips and 100 lancets every 3 months (more if medically necessary).
• Use a Medicare-enrolled supplier that accepts assignment to keep costs at 20%.

Screenings, exams, education, and prevention

Medicare covers a strong set of preventive and educational services for people with diabetes or at risk for it. Some are free; others cost 20% after the Part B deductible. Costs assume your provider accepts assignment.

Two programs are particularly worth knowing about. The Medicare Diabetes Prevention Program (MDPP) is a once-per-lifetime behavior-change program (16 weekly core sessions over 6 months, then 6 monthly follow-up sessions) at no cost if you qualify. Medical Nutrition Therapy (MNT) with a registered dietitian is also free if you qualify.

• Diabetes screenings: $0, up to 2 per year for at-risk beneficiaries.
• Medicare Diabetes Prevention Program (MDPP): $0 if you qualify; once per lifetime.
• MDPP eligibility: prediabetes (A1C 5.7–6.4%, fasting glucose 110–125 mg/dL, or 2-hr OGTT 140–199 mg/dL), BMI ≥25 (≥23 if Asian), no prior diabetes diagnosis, no ESRD, never previously enrolled.
• Medical Nutrition Therapy (dietitian): $0 if you qualify; 3 hours in year 1, then 2 hours/year follow-up.
• Diabetes self-management training (DSMT): 20% after deductible; 10 hours initial (1 individual + 9 group) plus 2 hours/year follow-up.
• Diabetic retinopathy eye exam: 20% after deductible; once a year.
• Glaucoma screening: 20% after deductible; once every 12 months.
• Diabetic foot exam: 20% after deductible; every 6 months if you have peripheral neuropathy with loss of protective sensation.
• Therapeutic shoes/inserts: 20% after deductible; 1 pair of shoes per year plus inserts, with a doctor's certification of need.

Non-insulin drugs and the 2026 out-of-pocket cap

Non-insulin diabetes medications — including metformin, other oral drugs, and GLP-1 medicines prescribed for diabetes — are covered under Part D, not Part B. What you pay depends on your specific plan's formulary (its list of covered drugs and tiers), so two people on the same medication can pay different amounts under different plans.

There is an important guardrail in 2026: Part D has an annual out-of-pocket cap of $2,100. Once your total out-of-pocket spending on covered drugs reaches that amount in a calendar year, you pay nothing more for covered Part D drugs for the rest of the year. The insulin cap and the drug cap together limit how much your diabetes medicines can cost you in a year.

Because non-insulin diabetes drugs run through Part D, you generally need a Part D plan (stand-alone, or built into a Medicare Advantage plan) to have those medications covered.

• Non-insulin diabetes drugs: covered under Part D; cost varies by plan formulary.
• 2026 Part D out-of-pocket cap: $2,100 per year, then $0 for covered drugs.
• Check that your specific drugs are on your plan's formulary before you enroll.

Original Medicare vs. Medicare Advantage for diabetes

Medicare Advantage (Part C) plans must cover everything Original Medicare covers, including all the diabetes benefits above, and most include Part D drug coverage built in. But how they deliver coverage differs: Advantage plans use networks, may require prior authorization for items like CGMs or pumps, and set their own copays instead of the standard 20% coinsurance. Some plans also offer extra benefits, but these vary widely by plan and are not guaranteed.

With Original Medicare (Part A and Part B), you pay the standard amounts — the $283 Part B deductible and 20% coinsurance on most diabetes equipment and services — and you can use any provider or supplier that accepts Medicare. Many people add a separate Part D drug plan and, often, a Medigap policy to help cover the 20% coinsurance.

There is no single "better" answer. If you want predictable cost-sharing and freedom to choose suppliers, Original Medicare plus Part D (and possibly Medigap) may fit. If you want lower premiums and built-in drug coverage and are comfortable with networks and prior authorization, an Advantage plan may fit. Compare a plan's copays for the specific diabetes items you use, and always confirm details in the plan's Evidence of Coverage. This guide is educational and is not affiliated with or endorsed by the federal government or any insurer.

• Original Medicare: standard 20% coinsurance after the $283 Part B deductible; any Medicare supplier; Part D and Medigap usually added separately.
• Medicare Advantage: same minimum coverage, but plan-set copays, networks, and possible prior authorization; drug coverage often built in. Confirm specifics in your Evidence of Coverage.
• Part B standard premium in 2026: $202.90/month (most people).