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What is Medicare?

Medicare is the primary federal health insurance program in the United States, designed specifically for people aged 65 or older. It also serves younger individuals with certain disabilities and those with End-Stage Renal Disease (ESRD) or ALS. Established in 1965, the program is managed by the Centers for Medicare & Medicaid Services (CMS) and provides a critical safety net for over 65 million Americans.

 

Understanding Medicare can be complex because it is not a “one-size-fits-all” plan. Instead, it is divided into several “parts” that cover specific services, from hospital stays to prescription drugs.

 

The Four Parts of Medicare

To navigate your coverage, it is essential to understand the distinction between the four main components:

Part A: Hospital Insurance

Part A covers “inpatient” care. This includes hospital stays, care in a skilled nursing facility, hospice care, and some home health care. Most people do not pay a monthly premium for Part A because they (or their spouse) paid Medicare taxes while working for at least 10 years.

 

  • 2026 Costs: For a hospital stay, the deductible is $1,736 per benefit period.

     

Part B: Medical Insurance

Part B covers “outpatient” services. This includes doctor visits, preventive services (like flu shots or screenings), ambulance services, and durable medical equipment like wheelchairs. Unlike Part A, Part B requires a monthly premium.

 

  • 2026 Costs: The standard monthly premium is $202.90, and the annual deductible is $283. After meeting the deductible, you typically pay 20% of the Medicare-approved amount for services.

     

Part C: Medicare Advantage

Medicare Advantage is an “all-in-one” alternative to Original Medicare (Parts A and B). These plans are offered by private companies approved by Medicare. They often include Part D (drug coverage) and may offer extra benefits like vision, dental, and hearing care. Most plans require you to use doctors within a specific network.

 

Part D: Prescription Drug Coverage

Part D helps cover the cost of prescription drugs. These plans are run by private insurance companies that follow rules set by Medicare. You can join a standalone Part D plan to add to Original Medicare or get it through a Medicare Advantage Plan.

 

Enrollment and Eligibility

Most Americans become eligible for Medicare when they turn 65. If you are already receiving Social Security benefits, you are typically enrolled in Parts A and B automatically. If not, you must sign up during specific windows:

 

  • Initial Enrollment Period (IEP): This is a 7-month window surrounding your 65th birthday (3 months before, the month of, and 3 months after).

     

  • General Enrollment Period: If you miss your IEP, you can sign up between January 1 and March 31 each year, though late enrollment penalties may apply.

     

  • Annual Enrollment Period (AEP): Every year from October 15 to December 7, current members can switch plans or move between Original Medicare and Medicare Advantage.

     

Medicare vs. Medicaid: What’s the Difference?

While they sound similar, they serve different purposes. Medicare is based primarily on age or disability, regardless of income. Medicaid is a joint federal and state program for people with limited income and resources. Some people qualify for both; these individuals are known as “dual eligibles” and often have most of their healthcare costs covered.

 

Helpful Resources

For official information, plan comparisons, and enrollment, use the following resources: