Diabetes is the most common chronic condition among Medicare beneficiaries, affecting more than one in four people on Medicare. Managing diabetes well requires an ongoing investment in supplies, medications, and monitoring — and Medicare covers a significant portion of these costs. But the rules are spread across multiple parts of Medicare, and understanding which benefit applies to which service can save you hundreds or even thousands of dollars per year.

This guide covers everything Medicare covers for diabetes management: continuous glucose monitors (CGMs), insulin, testing supplies, education programs, and preventive services.

Medicare’s Diabetes Coverage at a Glance

Medicare diabetes coverage is divided across two main programs:

  • Part B covers durable medical equipment (DME), diabetes self-management training, and some insulin for insulin pumps
  • Part D covers most prescription drugs, including oral diabetes medications and non-pump insulin
  • Part B preventive benefits cover diabetes screening tests at no cost if you’re at risk

Understanding which part applies matters because the cost-sharing rules are completely different. Part B DME typically requires 20% coinsurance after the deductible, while Part D costs depend on your specific plan’s formulary and cost-sharing tier.

Continuous Glucose Monitors (CGMs)

This is one of the most valuable Medicare diabetes benefits, and it changed significantly in recent years.

What Medicare covers: Medicare Part B covers CGMs and related supplies (sensors, transmitters, receivers) as durable medical equipment. Both therapeutic CGMs (used to make treatment decisions without a separate fingerstick test) and non-therapeutic CGMs (used as adjuncts to fingerstick testing) are covered.

Coverage requirements:

  • You have diabetes (Type 1 or Type 2)
  • Your treating physician prescribes the CGM
  • You have a face-to-face visit with your prescribing physician within six months before ordering the CGM

Cost under Part B: After meeting your Part B deductible ($283 in 2026), you pay 20% of the Medicare-approved amount. If you have Medigap coverage, the 20% coinsurance is typically covered by your supplement plan.

Specific CGM models covered: Medicare covers FDA-cleared CGM devices. Current covered devices include the Dexcom G7, Abbott FreeStyle Libre 2 and 3, and Medtronic CGM systems. Coverage updates as new devices receive FDA clearance.

Ordering CGMs: CGMs must be ordered through a Medicare-enrolled DMEPOS (Durable Medical Equipment, Prosthetics, Orthotics, and Supplies) supplier. Your doctor’s office can often help coordinate this, or you can find suppliers through Medicare’s online tool.

Blood Glucose Meters and Testing Supplies

Part B covers:

  • Blood glucose monitors
  • Blood glucose testing strips (up to 100 per month for non-insulin-dependent diabetes; higher limits for insulin-dependent diabetes)
  • Lancets and lancing devices
  • Glucose control solutions for calibrating your meter

Coverage limits: The number of test strips covered depends on your diabetes management needs:

  • Non-insulin users: up to 100 strips per month
  • Insulin users: up to 300 strips per month
  • If your doctor documents medical necessity for higher quantities, Medicare may approve additional strips

Cost: 20% coinsurance after the Part B deductible, same as CGMs.

Therapeutic shoes: Beneficiaries with diabetes who have foot complications (peripheral neuropathy, foot deformity, history of amputation, etc.) may be covered for one pair of therapeutic shoes and three pairs of insoles per calendar year under Part B.

Insulin Coverage: Part B vs. Part D

Insulin coverage is divided between Part B and Part D depending on how the insulin is administered:

Insulin via Insulin Pump (Part B)

If you use an external insulin pump, Medicare Part B covers both the pump (as DME) and the insulin used in the pump. This is one of the most favorable coverage scenarios for insulin-dependent diabetics because:

  • Part B drug coinsurance for insulin pump insulin is capped at $35 per month as of 2023 (Inflation Reduction Act)
  • The insulin is treated as durable medical equipment, not a prescription drug
  • Medigap plans that cover Part B coinsurance can further reduce this cost

Insulin via Injection (Part D)

If you inject insulin via syringe, pen, or other delivery method, it’s covered under Part D — not Part B. The cost depends significantly on your plan.

The $35 insulin cap: As of 2023, the Inflation Reduction Act capped out-of-pocket costs for covered insulin products at $35 per month per prescription under Part D. This applies across all coverage phases (deductible, initial, coverage gap). You cannot be charged more than $35 per month for a covered insulin, regardless of your plan’s normal cost-sharing.

Choosing the right Part D plan: Not all insulin products are on every plan’s formulary. When selecting a Part D plan, check that your specific insulin product is covered — and at what tier. The plan finder at Medicare.gov allows you to enter your medications and compare plans by actual estimated annual drug costs.

Other injectable diabetes medications: GLP-1 receptor agonists like semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) are covered under Part D when used for diabetes management. Note that coverage for weight loss alone may be different from coverage for diabetes management — these drugs may require documentation of a diabetes diagnosis for coverage.

Oral Diabetes Medications

Oral medications like metformin, sulfonylureas, SGLT-2 inhibitors (Jardiance, Farxiga), and DPP-4 inhibitors (Januvia, Tradjenta) are covered under Part D prescription drug plans.

Costs vary widely by:

  • Drug tier (generic vs. brand vs. specialty)
  • Plan formulary (some plans have lower cost-sharing for preferred generics)
  • Coverage phase (deductible, initial coverage, catastrophic coverage)

Generic medications: Most common oral diabetes drugs have inexpensive generic versions. Metformin, for example, is a Tier 1 generic on most plans, meaning the copay is often $0–$5 per month. When you’re comparing Part D plans during open enrollment, prioritize plans that place your specific medications on lower tiers.

Diabetes Self-Management Training (DSMT)

Medicare Part B covers diabetes self-management training (DSMT) — structured education provided by certified diabetes care and education specialists (CDCES).

Initial DSMT coverage: Up to 10 hours of initial training in the first year following a diagnosis of diabetes (or at any time if your physician has not previously referred you for DSMT)

Ongoing DSMT coverage: 2 hours per year after the initial year

Format: DSMT can be delivered one-on-one or in group settings. Group sessions often provide the full 10-hour initial training in a structured curriculum.

Cost: 20% coinsurance after the Part B deductible, same as other Part B services.

Finding DSMT providers: Your doctor can refer you to an accredited DSMT program. Programs are accredited by the Association of Diabetes Care and Education Specialists (ADCES) or the American Diabetes Association (ADA). Many hospitals, community health centers, and endocrinology practices offer accredited programs.

Why this matters: Studies consistently show that structured diabetes education reduces A1C levels, lowers hospitalization rates, and reduces long-term diabetes complications. The 10-hour initial DSMT benefit is genuinely valuable — many people don’t use it simply because they don’t know about it.

Medical Nutrition Therapy (MNT)

Separate from DSMT, Medicare Part B also covers medical nutrition therapy (MNT) for people with diabetes or kidney disease.

Coverage: 3 hours of MNT with a registered dietitian in the first year, then 2 hours per year thereafter.

Cost: 20% coinsurance, but if your physician refers you for MNT as part of diabetes management, you may qualify for waived cost-sharing in some circumstances.

Diabetes Screening Tests (Free Preventive Benefit)

If you are at risk for diabetes but have not been diagnosed, Medicare covers up to two fasting blood glucose tests per year at no cost (no deductible, no coinsurance).

Who qualifies for free screening: You’re considered at risk if you have one or more of:

  • High blood pressure (hypertension)
  • Dyslipidemia (high cholesterol or abnormal lipid levels)
  • Obesity (BMI ≥ 30)
  • History of high blood sugar (glucose)
  • A family history of diabetes
  • A history of gestational diabetes

If your screening test results show you have prediabetes, Medicare will cover additional screening tests over the next year.

The Part B Deductible and the Standard Approach

Medicare Part B has an annual deductible ($283 in 2026). All Part B diabetes supplies — meters, strips, CGMs, DSMT — count toward this single annual deductible before the 20% coinsurance applies.

For people with significant diabetes supply needs, the deductible is often met early in the year. Once met, you’re only paying the 20% coinsurance on new claims.

Medigap and diabetes: If you have a Medigap (Medicare Supplement) plan, it typically covers the 20% Part B coinsurance, which means your CGM, testing supplies, and DSMT costs could be covered at close to zero out-of-pocket once the deductible is met. This makes Medigap highly valuable for beneficiaries with significant Part B diabetes supply needs. See our Medigap plan comparison guide for more detail.

Medicare Advantage and Diabetes

If you’re enrolled in a Medicare Advantage (MA) plan instead of Original Medicare, your diabetes benefits are provided through the MA plan rather than directly through Medicare.

MA plans must cover: Everything Original Medicare covers, including all diabetes supplies and DSMT. However, the cost-sharing can be different — MA plans may charge different copays or coinsurance amounts.

Extra MA benefits: Some MA plans offer additional diabetes-related benefits not covered by Original Medicare:

  • Reduced cost-sharing for CGMs or insulin
  • Additional DSMT hours beyond the Medicare standard
  • Gym memberships or wellness programs relevant to diabetes management
  • Meal delivery for newly diagnosed diabetics

Trade-offs: MA plans often have network restrictions. If you have an endocrinologist, certified diabetes educator, or specialty pharmacy you rely on, verify they’re in the MA plan’s network before enrolling. Original Medicare gives you broader provider access. See our Medicare Advantage vs. Original Medicare comparison for a full cost and coverage comparison.

Part D and the Insulin Saving Strategies

Even with the $35 insulin cap, there are strategies to minimize your Part D costs for other diabetes medications:

Use the Medicare Plan Finder: Each fall during the Annual Enrollment Period (October 15 – December 7), use Medicare.gov’s plan finder to compare plans based on your actual drugs and local pharmacies. The plan that covered you well last year may not be the best option next year.

Preferred pharmacy networks: Many Part D plans have preferred pharmacy networks where cost-sharing is lower. Using a preferred pharmacy for your diabetes medications can significantly reduce costs.

Mail-order pharmacy: Most Part D plans offer lower cost-sharing for 90-day supplies through mail-order pharmacies. For maintenance medications like oral diabetes drugs, mail-order can cut your monthly costs.

Extra Help (Low Income Subsidy): If your income is limited, you may qualify for Extra Help, a federal program that significantly reduces Part D premiums, deductibles, and copays — including for insulin and other diabetes drugs. See our Medicare Savings Programs guide for details on eligibility and how to apply.

Coordination with Other Diabetes Care Needs

Annual wellness visit: Medicare covers one free annual wellness visit per year that can include diabetes monitoring, medication review, and health risk assessment. This is separate from and in addition to your regular diabetes office visits covered under Part B.

Foot exams: Medicare Part B covers therapeutic shoe fitting, but routine foot care (nail trimming, callus removal) is generally not covered unless you have diabetic peripheral neuropathy with evidence of loss of protective sensation. Your doctor can document the necessity.

Foot ulcers and wound care: Up to one in three people with diabetes develops a foot ulcer, and ulcers precede roughly 85 percent of diabetes-related amputations. Medicare covers the full treatment pathway — wound center visits and debridement, total contact casting, skin substitutes, hyperbaric oxygen for qualifying deep ulcers, and home health wound nursing — but the costs repeat weekly for months, which changes the supplemental-coverage math. See the Medicare wound care and diabetic foot ulcer guide for what each therapy costs and the prevention benefits (therapeutic shoes, covered foot exams) most beneficiaries never claim.

Peripheral artery disease: Diabetes is the single strongest risk factor for peripheral artery disease (PAD), a narrowing of the leg arteries that can progress from claudication (leg pain with walking) to non-healing wounds and amputation. Medicare covers PAD-specific diagnosis (ankle-brachial index testing, duplex ultrasound), up to 72 sessions of supervised exercise therapy, and revascularization procedures when needed. Controlling blood sugar is the most important intervention for slowing PAD progression.

Metabolic fatty liver disease (MASH): Up to 75 percent of people with Type 2 diabetes have some degree of metabolic-associated steatotic liver disease (MASLD), and roughly one in five of those will develop the inflammatory form — MASH — which can progress to cirrhosis and liver cancer. In 2024 the FDA approved the first drug specifically for MASH: resmetirom (Rezdiffra), covered under Part D at or below the $2,100 annual cap. If you have elevated liver enzymes alongside diabetes, ask your provider for a FIB-4 fibrosis score and a FibroScan referral — both covered under Part B. See the Medicare MASH and fatty liver disease guide for the full coverage picture.

Eye exams: Standard eye exams are not covered by Part B, but Medicare does cover annual dilated eye exams for people with diabetes — one per year for diabetic retinopathy detection.

Gout and hyperuricemia: Insulin resistance — the metabolic defect underlying type 2 diabetes — also reduces renal urate excretion, driving elevated serum uric acid levels. Gout affects roughly 9 to 12 percent of men with Medicare-age diabetes, and uric acid kidney stones are more common in patients with metabolic syndrome. If you have both diabetes and recurrent joint pain or kidney stones, ask your physician to check a serum uric acid level. Medicare Part B covers the test and the rheumatology evaluation; Part D covers generic allopurinol for urate-lowering therapy. See Medicare coverage for gout and hyperuricemia for the full treatment and cost picture.

Colorectal cancer: Type 2 diabetes increases colorectal cancer risk by approximately 20–30%, driven by insulin resistance, chronic hyperinsulinemia, and the low-grade systemic inflammation that accompanies metabolic syndrome. Medicare beneficiaries with diabetes should be particularly conscientious about colorectal cancer screening — a preventive colonoscopy is covered under Part B at no cost every 10 years for average-risk adults (every 2 years if high-risk), and 2023 rule changes mean polyp removal during a screening no longer triggers the deductible and carries only a reduced, phasing-out coinsurance. See our Medicare colonoscopy screening guide for the full screening cost rules, and Medicare coverage for colorectal cancer for chemotherapy and targeted therapy coverage.

Hand complications — carpal tunnel, trigger finger, and Dupuytren’s: Diabetes roughly doubles the risk of carpal tunnel syndrome and raises lifetime trigger finger risk to as much as 10 percent — glycation stiffens the tendon sheaths and connective tissue of the hand, and all three conditions frequently co-occur in long-standing diabetes. Medicare covers the full pathway under Part B: nerve testing, splints, injections, and outpatient surgery. If your fingers are numb at night or a finger has started catching, see Medicare coverage for carpal tunnel and hand surgery — and note that hand numbness in diabetics deserves an EMG, because peripheral neuropathy and carpal tunnel are treated very differently.

Kidney disease: Diabetic kidney disease (diabetic nephropathy) progression is monitored through regular labs. Part B covers lab tests ordered by your physician, including kidney function panels (eGFR, creatinine) and urine albumin tests that screen for early diabetic kidney disease.

What Medicare Does Not Cover for Diabetes

Be aware of these gaps:

  • Routine nutritional supplements: Products like Ensure or Glucerna are not covered unless specifically prescribed for a condition requiring enteral nutrition
  • Over-the-counter medications: OTC items like many glucose gel products are not Part D covered
  • Non-prescribed CGM use: If you don’t have a prescription or don’t meet coverage criteria, CGM costs are your responsibility
  • Weight loss drugs: As of 2025, Medicare does not cover weight loss medications prescribed solely for obesity — though this is a changing landscape for drugs that also treat diabetes

Action Steps for Diabetics on Medicare

  1. Ask your doctor about a CGM if you’re not already using one — it’s covered under Part B if you’re diagnosed with diabetes
  2. Use your DSMT benefit — 10 initial hours of structured diabetes education is available and underused. Ask your doctor for a referral
  3. Check your Part D plan each fall during open enrollment to make sure your insulin and other medications are covered at favorable tiers
  4. Explore Extra Help if your income is modest — it can dramatically reduce your drug costs
  5. Get your annual dilated eye exam — it’s covered under Part B specifically for diabetics, unlike standard eye exams
  6. Ask about therapeutic shoes if you have foot complications — they’re a covered Part B benefit many beneficiaries miss

For the most current coverage details and to find Medicare-approved suppliers, visit Medicare.gov or call 1-800-MEDICARE (1-800-633-4227).

Medicare’s diabetes benefits are generous compared to what many people expect — but navigating which part covers which service takes some planning. If you’re approaching Medicare eligibility and managing diabetes, review the Medicare enrollment periods to ensure you enroll without gaps in coverage that could interrupt your medication supply.

Sources

All sources are official government or nonprofit consumer resources, verified July 2026. Medicare and Social Security rules and dollar amounts change annually — confirm current figures at the links above before making decisions.