Why Retirees Fear Healthcare Costs—and What Medicare Can Do

If you've ever lain awake at night wondering what a serious illness would do to your retirement savings, you're in very good company. Healthcare cost anxiety consistently ranks as the number-one financial fear among Americans aged 65 and older, and the concern is entirely rational. Unlike most financial risks in retirement—market downturns, inflation, longevity—a major medical event can arrive without warning and generate bills that dwarf anything you planned for. The good news is that Medicare provides a real foundation of coverage. The difficult truth is that foundation has significant cracks, and understanding exactly where they are is the first step toward protecting yourself.

Original Medicare, the federal program administered by the Centers for Medicare & Medicaid Services (CMS), consists of two core parts. Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Part B covers outpatient care: doctor visits, preventive screenings, lab work, durable medical equipment, and outpatient procedures. Together, they cover a broad range of services—but they do not cover everything, and they do not cap what you can spend in a given year. That last point is critical. In 2026, Original Medicare has no annual out-of-pocket maximum. If you have a catastrophic illness requiring repeated hospitalizations and specialist visits, your cost exposure is theoretically unlimited.

Here's how the cost-sharing actually works under Original Medicare in 2026. For Part A, you pay a $1,676 inpatient hospital deductible per benefit period—not per year, per benefit period, which means you could owe it more than once in a single calendar year if you're discharged and readmitted after 60 days. Days 61 through 90 of a hospital stay cost you $419 per day in coinsurance. Beyond 90 days, you draw on a one-time lifetime reserve of 60 days at $838 per day. For Part B, the standard monthly premium in 2026 is $185.00, with a $257 annual deductible. After that deductible, you pay 20% of the Medicare-approved amount for covered services—with no ceiling on that 20%. A $500,000 cancer treatment course, for example, could leave you with $100,000 in out-of-pocket costs under Original Medicare alone.

This is precisely why the research on retirement healthcare costs is so sobering. The Center for Retirement Research at Boston College has documented repeatedly that retirees systematically underestimate what they'll spend on healthcare, and that this miscalculation is one of the leading causes of financial hardship in later life. The Employee Benefit Research Institute has estimated that a 65-year-old couple with median prescription drug needs may require approximately $296,000 in savings just to cover healthcare costs throughout retirement—and that figure assumes they have Medicare coverage. Without a strategy to supplement Original Medicare, even a well-funded retirement can be destabilized by a single serious diagnosis.

So what are the actual options for closing these gaps? The most comprehensive protection under Original Medicare comes from Medigap, also called Medicare Supplement Insurance. These are private insurance policies specifically designed to pay the cost-sharing that Original Medicare leaves behind. The most popular plan in 2026 is Medigap Plan G, which covers the Part A deductible, Part A coinsurance, Part B coinsurance (that 20%), skilled nursing facility coinsurance, and foreign travel emergency care. The one thing Plan G does not cover is the Part B deductible ($257 in 2026), which you pay once per year. Monthly premiums for Plan G vary significantly by age, location, and insurer—a 65-year-old in a mid-sized Midwestern city might pay $120 to $160 per month, while someone in a high-cost coastal market could pay $200 or more. But in exchange, your annual out-of-pocket exposure for covered services is essentially capped at that $257 deductible. For someone managing a chronic condition or facing surgery, that predictability has enormous financial value.

Medigap Plan N is a lower-premium alternative worth considering if you're generally healthy. Plan N covers most of the same benefits as Plan G but requires copayments of up to $20 for office visits and up to $50 for emergency room visits that don't result in inpatient admission. Premiums for Plan N typically run $30 to $60 per month less than Plan G, depending on your market. If you rarely see specialists and have no ongoing conditions requiring frequent visits, Plan N can deliver solid protection at a meaningfully lower cost. The tradeoff is that you're accepting some unpredictability in your annual spending.

One enrollment timing issue that catches many beneficiaries off guard: Medigap has a guaranteed issue window. When you first enroll in Medicare Part B, you have a six-month open enrollment period during which insurers must sell you any Medigap plan they offer in your state, at standard rates, regardless of your health history. Miss that window, and insurers in most states can use medical underwriting—meaning they can charge you more or deny coverage based on pre-existing conditions. If you have a serious health history and missed your initial enrollment window, your options may be limited. However, thirteen states have enacted birthday rules that give beneficiaries an annual 30-day window to switch Medigap plans without underwriting: California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, and Oregon. If you live in one of these states, you have an annual opportunity to shop for better rates even outside your initial enrollment period.

Original Medicare also does not include prescription drug coverage. To get drug coverage under Original Medicare, you must separately enroll in a Part D Prescription Drug Plan. In 2026, one of the most significant changes to Part D is the new $2,000 annual out-of-pocket cap on covered drugs—a provision of the Inflation Reduction Act that represents the most meaningful improvement to drug coverage in two decades. Once you've spent $2,000 on covered Part D drugs in a calendar year, your plan pays 100% for the rest of the year. This cap is particularly important for beneficiaries managing cancer, rheumatoid arthritis, multiple sclerosis, or other conditions requiring expensive specialty medications. Part D premiums vary widely by plan and region, but the national average benchmark premium in 2026 is approximately $46.50 per month. You can compare plans at Medicare.gov's Plan Finder tool using your specific drug list.

For beneficiaries who want an all-in-one alternative to Original Medicare plus Medigap plus Part D, Medicare Advantage (Part C) bundles hospital, medical, and usually drug coverage into a single private plan. Medicare Advantage plans in 2026 must include an annual out-of-pocket maximum—no plan can expose you to unlimited costs the way Original Medicare can. However, Medicare Advantage plans use networks of doctors and hospitals, require referrals in many cases, and require prior authorization for certain procedures. The tradeoff between the flexibility of Original Medicare with Medigap and the cost containment of Medicare Advantage is one of the most consequential decisions a new beneficiary makes. If you travel frequently, split time between two states, or have long-standing relationships with specialists you want to keep, Original Medicare with a Medigap plan typically offers more flexibility. If you're cost-sensitive, primarily use in-network providers, and want extra benefits like dental and vision, Medicare Advantage may be worth exploring.

The Annual Enrollment Period (AEP) runs October 15 through December 7 each year, during which Medicare Advantage and Part D enrollees can switch plans for the following year. The Open Enrollment Period (OEP) runs January 1 through March 31 and allows Medicare Advantage enrollees to switch to a different Advantage plan or return to Original Medicare once. Neither period allows you to change Medigap plans without underwriting in most states—that's governed by your initial enrollment window or your state's birthday rule. Planning ahead, ideally in the summer before AEP, gives you time to compare drug formularies, check whether your doctors are in-network, and calculate your true total cost of coverage rather than just the monthly premium.

The anxiety retirees feel about healthcare costs is not irrational—it's a reasonable response to a system with real financial exposure built into it. But that exposure is manageable with the right coverage strategy. Knowing exactly what Original Medicare costs you, where the gaps are, and which supplemental options fit your health profile and budget is the most powerful thing you can do to protect your retirement. Start with Medicare.gov's Plan Finder, review your coverage every fall during AEP, and if you're newly enrolling, prioritize getting into a Medigap plan during your guaranteed issue window—because that window, once closed, is very hard to reopen.