Learn About Medicare Coverage for Seniors

Understanding Medicare: The Basics for Seniors

Medicare is a federal health insurance program designed for people age 65 and older, regardless of income or health history. The program launched in 1965 and now covers more than 66 million Americans. This guide provides educational information about how Medicare works, what different parts cover, and what seniors should understand about their options.

The program operates in different parts, each covering different types of medical care. Most people think of Medicare as a single insurance plan, but it actually functions as several separate coverage options. Understanding these distinctions helps seniors make informed decisions about their healthcare.

Medicare is funded through payroll taxes during a person's working years. Workers and employers each contribute 1.45% of wages to the Medicare Hospital Insurance Trust Fund. Self-employed individuals pay 2.9%. These contributions fund Part A coverage for hospital services. Parts B and D are funded through general tax revenue and beneficiary premiums.

The program is administered by the Centers for Medicare & Medicaid Services (CMS), a division of the Department of Health and Human Services. Each state also has a State Health Insurance Assistance Program (SHIP) that offers free information sessions about Medicare coverage options. These programs employ counselors who can answer questions about how different parts work.

Turning 65 involves several important decisions about Medicare coverage. People who are already receiving Social Security benefits are typically enrolled in Medicare Part A and Part B automatically. Those not yet receiving Social Security must take separate steps to understand their options. The initial enrollment period typically begins three months before the month someone turns 65 and ends three months after that month.

Practical Takeaway: Schedule a conversation with your State Health Insurance Assistance Program several months before turning 65. These free counselors can explain which parts of Medicare apply to your situation and answer questions about coverage options specific to your health needs.

Part A and Part B: Hospital and Medical Insurance

Part A covers inpatient hospital care, skilled nursing facility care, hospice care, and home health services. Most people do not pay a premium for Part A because they or their spouse paid Medicare taxes for at least 10 years while working. In 2024, those who do pay a premium pay between $278 and $556 per month, depending on how many quarters of Medicare tax payment history they have.

When Part A covers a hospital stay, seniors pay a deductible for each benefit period. A benefit period begins when someone enters the hospital and ends after they have not received hospital or skilled nursing care for 60 consecutive days. In 2024, the Part A deductible is $1,632 per benefit period. After paying this deductible, Part A covers all covered services for days 1-60 of a hospital stay. Days 61-90 require a daily copayment of $408. Days 91 and beyond require higher daily copayments.

Part B covers doctors' services, outpatient care, medical equipment, and other services that Part A does not cover. Nearly everyone who has Part A also enrolls in Part B. The Part B premium in 2024 is $164.90 per month for most beneficiaries, though higher-income beneficiaries pay more. Part B also has an annual deductible of $240, after which Medicare typically pays 80% of covered services and the senior pays 20%.

It is important to understand that neither Part A nor Part B covers everything. Neither covers routine dental care, vision exams for eyeglasses, hearing aids, or long-term care in a nursing home. Seniors need to plan for these costs separately or through other coverage options like Medigap or Medicare Advantage plans.

Many seniors find the cost-sharing under Original Medicare (Part A and Part B) significant. A person hospitalized for three weeks might face the Part A deductible plus daily copayments. A chronic condition requiring frequent doctor visits could mean paying 20% of the cost of each visit plus the annual Part B deductible. These out-of-pocket costs vary greatly depending on the type and amount of care needed.

Practical Takeaway: Write down any chronic health conditions you manage and estimate how many doctor visits you typically have each year. Calculate what 20% of your typical doctor visit costs would be to understand your potential out-of-pocket expenses under Part B. This helps you decide whether additional coverage options might be right for you.

Part D: Prescription Drug Coverage

Part D provides coverage for prescription medications through private insurance companies that contract with Medicare. Enrollment is optional, but delaying enrollment without other creditable drug coverage can result in permanent penalties. The penalty amount increases by approximately 1% for each month of delay, calculated on the national base beneficiary premium, which was $34.70 in 2024. These penalties persist as long as a person has Part D coverage.

Part D coverage works in stages during each calendar year. The process begins with a deductible that beneficiaries must pay before coverage begins. In 2024, the deductible ranges from $0 to $565, depending on which plan a person chooses. After meeting the deductible, the beneficiary and the plan share the cost of medications, with the plan typically paying about 75% and the beneficiary paying about 25%.

Coverage continues through the initial coverage period until combined beneficiary and plan spending reaches $5,830 in 2024. At that point, the beneficiary enters the "donut hole" or coverage gap, where they pay the full cost of medications until out-of-pocket spending reaches $7,050. The beneficiary then enters catastrophic coverage, where they pay a small copayment or coinsurance for the remainder of the year.

Different Part D plans cover different medications. The medications a plan covers are listed in a document called a formulary. A drug might be covered by one plan but not another, or covered at different cost levels depending on the plan. This means comparing plans based on the specific medications someone takes is essential. Many seniors discover mid-year that their plan does not cover a medication their doctor prescribes, which can be expensive if they do not switch plans.

The coverage landscape for prescription drugs changes annually. Plans adjust their formularies, copayment amounts, and which medications are in each cost tier. Medicare publishes updated information about all available Part D plans in October each year, with coverage beginning January 1. Seniors can compare plans using the Plan Finder tool on Medicare.gov.

Practical Takeaway: List every prescription medication you currently take, including the dose and frequency. Check Medicare.gov's Plan Finder tool in October to see how much each of your medications costs under different Part D plans in your area. Choosing a plan that covers your specific drugs at the lowest cost saves hundreds or thousands annually.

Medicare Advantage and Medigap: Supplemental Coverage Options

Seniors with Original Medicare (Part A and Part B) face significant out-of-pocket costs for deductibles, copayments, and coinsurance. Two main strategies exist to manage these costs: Medicare Advantage (Part C) and Medigap plans.

Medicare Advantage plans are offered by private insurance companies approved by Medicare. These plans must cover everything that Original Medicare covers, plus typically include prescription drug coverage (Part D) and additional benefits like dental, vision, or hearing coverage. In 2024, the average Medicare Advantage plan premium is zero dollars per month, though beneficiaries still pay Part B premiums to Medicare. However, Medicare Advantage plans use networks, which means they may not cover care from doctors outside the plan's network except in emergencies. Plans also typically have higher out-of-pocket limits and may require prior authorization before certain treatments or specialist visits.

Medigap plans, also called supplemental insurance, work differently. These are sold by private insurance companies but are standardized by the federal government. All plans labeled "Plan G" offer identical benefits, regardless of which insurance company sells it—the only difference is the premium charged. Medigap plans work alongside Original Medicare to cover some or all of the costs that Medicare does not cover. For example, Plan G covers the Part B deductible and the 20% coinsurance that Medicare does not pay. Medigap plans do not have networks, so beneficiaries can see any doctor who accepts Medicare, which appealed to 8 million Americans as of 2023 who chose this option.

The decision between Medicare Advantage and Medigap depends on individual health needs and preferences. Someone with multiple chronic conditions seeing many specialists might prefer a Medigap plan because there are no