Roughly one in four Americans on Medicare lives with diabetes. In Arizona that number is even higher in some communities. If you or a parent is on Medicare and managing diabetes, the choices you make about your plan have real financial consequences. The right plan can mean predictable, reasonable costs. The wrong plan can leave you spending thousands a year on supplies, medications, and equipment.
I am a Medicare broker in Mesa, and diabetes is one of the most common chronic conditions among my clients. The good news is that Medicare actually covers diabetes care fairly well, and the Inflation Reduction Act has made some big improvements in recent years, including a hard cap on insulin costs. The trick is understanding which parts of Medicare cover what, and choosing a plan that handles your specific situation well.
The $35 Insulin Cap and What It Actually Covers
The biggest recent change in Medicare diabetes coverage is the $35 monthly cap on insulin. Starting in 2023, Medicare Part D plans have been required to cap a 30-day supply of any covered insulin at $35. There is no deductible to meet first. If you fill an insulin prescription on January 2, you pay no more than $35 for that 30-day supply. Same on April 2. Same on October 2.
In 2026, the cap is still in place. It applies to all Medicare Part D plans, both standalone Part D plans paired with Original Medicare and the integrated drug coverage in Medicare Advantage plans.
The cap also applies to insulin used in pumps, which is covered under Part B in some cases instead of Part D. Pump insulin under Part B is also capped at $35 per month.
A few things to watch. The cap is on a 30-day supply. If your prescription is for a 90-day supply, you pay up to $105 instead of having three separate $35 fills. If your insulin is non-formulary on your specific plan, you can still get the $35 price by switching to a covered insulin or by appealing through your doctor. Almost every plan covers at least the major insulin formulations like Lantus, Basaglar, Humalog, NovoLog, Tresiba, and similar.
If you are on insulin and paying more than $35 a month, something is wrong. Either you are on a plan that does not cover your specific insulin, or there has been an administrative error. A broker or your pharmacist can help you sort it out.
Continuous Glucose Monitors Under Medicare
Continuous glucose monitors, or CGMs, have transformed diabetes management. Medicare covers them under Part B durable medical equipment when you meet certain criteria.
To qualify for CGM coverage, Medicare generally requires that you are on insulin or have a documented history of problematic hypoglycemia. The most common covered devices in Arizona are the Dexcom G7 and the FreeStyle Libre 3, both of which are widely available through Medicare-approved DME suppliers in the Valley.
Under Original Medicare, after you meet the Part B deductible, you pay 20 percent of the Medicare-approved amount for the device and supplies. A Medigap supplement like Plan G covers that 20 percent, leaving you with predictable, often near-zero out-of-pocket costs for ongoing CGM use.
Under Medicare Advantage, CGM coverage is required at the same level as Original Medicare, but copays and prior authorization requirements vary by plan. Some plans handle CGM smoothly. Others put you through paperwork and delays. If CGM is essential to your management, the plan’s track record on durable medical equipment matters.
Other Diabetes Supplies Medicare Covers
Beyond insulin and CGMs, Medicare covers a range of diabetes-related supplies and services. The coverage is split between Part B and Part D, which trips people up.
Under Part B, Medicare covers blood sugar test strips, lancets, blood sugar monitors, control solutions, and external insulin pumps and the insulin used in them. Diabetic foot exams once a year if you have diabetic neuropathy. Diabetes self-management training when prescribed by a doctor. Medical nutrition therapy with a registered dietitian. Therapeutic shoes for people with severe diabetic foot disease.
Under Part D, you get oral diabetes medications like metformin, GLP-1 agonists like Ozempic and Mounjaro when used for type 2 diabetes, and insulin used by injection rather than pump. Drug coverage and tier placement vary by plan.
The Part B versus Part D split matters because supplements like Plan G cover the Part B side completely. Drug costs come out of Part D, which is separate. Knowing where each item falls helps you predict your costs.
How to Pick the Right Plan if You Have Diabetes
Here is how I think about plan selection for clients with diabetes.
If you take a lot of medications, including insulin, oral diabetes drugs, and other related medications for blood pressure, cholesterol, and so on, drug coverage is the single most important factor. We run your full medication list through every available plan and find the one that covers them at the lowest combined cost. The $35 insulin cap helps, but the rest of your medications can swing the math by hundreds or thousands of dollars a year.
If you use a CGM, the plan needs to handle DME smoothly. Some Advantage plans require prior authorization for every reorder, which is a hassle. Original Medicare plus a supplement is generally the simplest path for CGM users because the rules are uniform and there is no per-plan variation.
If you are on a pump, similar logic applies. Pump supplies, infusion sets, reservoirs, and pump insulin all need to be covered without obstacles. Original Medicare with a supplement keeps the rules simple and predictable.
If your diabetes is well managed, you take metformin and one other medication, and you do not use a CGM or pump, almost any reasonable plan will work. In that case, the decision comes down to your other priorities like network, premium, and extras.
Specialists, Endocrinologists, and Network Considerations
If you are managing diabetes seriously, you probably see an endocrinologist at least once or twice a year. In Maricopa County, the major endocrinology practices include groups affiliated with Banner, HonorHealth, Mayo Clinic, and a number of independent practices.
If you are on a Medicare Advantage plan, your endocrinologist needs to be in network. If they are not, a switch to a different plan or to Original Medicare with a supplement may be in order. Mayo Clinic, in particular, is selective about which plans it accepts, and many Mesa-area patients who want to be seen at Mayo end up choosing Original Medicare with a Medigap supplement specifically for that access.
The same applies for diabetes-related specialists. Cardiologists, nephrologists, ophthalmologists for retinal exams, podiatrists, and wound care specialists are all part of comprehensive diabetes care. The best plan for you keeps all of those providers accessible.
What About GLP-1 Drugs Like Ozempic, Mounjaro, and Wegovy?
GLP-1 drugs have changed diabetes treatment dramatically and are also being used heavily for weight management. Medicare’s coverage rules are specific.
For type 2 diabetes, Medicare Part D plans cover GLP-1 drugs. Tier placement varies by plan, and you may face prior authorization. With the new Part D out-of-pocket cap, the maximum any Medicare beneficiary pays for covered drugs in 2026 is $2,000 across the year, including high-cost drugs like GLP-1 agonists. This is a massive change from a few years ago when these drugs alone could cost thousands per year out of pocket.
For weight management without diabetes, traditional Medicare coverage has been limited. Recent expansions in coverage for cardiovascular risk reduction in some specific conditions have changed this in narrow cases. If you are using a GLP-1 drug for weight management without a diabetes diagnosis, your coverage situation is more complex and worth a careful conversation.
The 2026 Part D Out-of-Pocket Cap Changes Everything
I mentioned this in the GLP-1 section, but it is worth pulling out separately because it is the biggest pharmacy benefit change in Medicare history. Starting in 2025 and continuing in 2026, Part D plans are required to cap a member’s annual out-of-pocket drug spending at $2,000.
For someone with diabetes who takes insulin, oral diabetes drugs, and other medications, this cap is huge. In past years, a diabetic on insulin and a few other expensive drugs could easily spend $5,000, $7,000, or more out of pocket each year. Now, no matter how many or how expensive their medications, the maximum is $2,000.
Medicare also offers a payment smoothing program called the Medicare Prescription Payment Plan that lets beneficiaries pay this $2,000 across the year in monthly installments rather than as upfront pharmacy charges. Worth asking your plan about if affordability is tight.
Need Help Picking a Plan That Handles Your Diabetes Well?
If you have diabetes and want to make sure your Medicare plan covers your specific medications, supplies, and providers without surprises, I can help. I work with diabetic clients in Mesa, Gilbert, Chandler, Tempe, Scottsdale, and across the East Valley.
Call me at 480-296-5804 or request a free consultation. No pressure, no obligation, and no cost to you. We will go through your insulin, your other medications, your CGM or pump situation, and your endocrinologist and find a plan that handles everything cleanly.