Turning 65 brings a lot of mail. Most of it is about Medicare, and most of it is confusing. This guide walks through the Medicare basics in the simplest way that we know how to. We will cover what Parts A and B actually pay for, how you qualify, and how a Medicare Advantage plan differs from a Medicare Supplement.

We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.

Medicare Basics: How the Program Is Built

Medicare is federal health insurance. Congress created it in 1965 for people age 65 and older. It later grew to cover younger people with long-term disabilities. Today it serves roughly 68 million Americans, according to KFF’s Medicare 101 overview.

The program splits into parts, and the letters trip people up. Part A and Part B together make up what everyone calls Original Medicare. Part C is another name for Medicare Advantage. Part D covers prescription drugs. Medicare Supplement insurance, often called Medigap, is a separate private policy that helps pay your share of Original Medicare costs.

That is really it. The Medicare basics start with those five labels. Once they click, the rest of the decisions get much easier. Medicare.gov keeps a clear rundown of the parts of Medicare straight from the source.

What Medicare Part A and Part B Cover

Part A is hospital insurance. It helps pay for inpatient hospital stays, skilled nursing facility care, hospice care, and home health care. Think of it as coverage for the times you are admitted somewhere.

Part B is medical insurance. It covers doctor visits, outpatient care, lab work, and durable medical equipment like walkers and wheelchairs. It also covers many preventive services. Annual wellness visits, screenings, and most vaccines fall under Part B.

Most people pay no monthly premium for Part A. You earn that by paying Medicare taxes across at least 10 years of work. Part B carries a monthly premium for nearly everyone, and higher earners pay more. Both parts also have deductibles and cost sharing.

Here is the piece that shapes everything else. Original Medicare pays most of the cost for covered services, and you pay the rest. On its own, it sets no annual cap on what you spend out of pocket. That single detail drives the coverage choice we will get to shortly. Dollar amounts change every year, so check Medicare.gov for current figures.

How You Qualify for Medicare

Eligibility is one of the friendlier parts of the Medicare basics. Most people qualify at age 65. Your income does not matter. Your medical history does not matter either.

You get premium-free Part A if you or your spouse worked at least 40 quarters in Medicare-taxed jobs. That works out to 10 years. If you fall short of 40 quarters, you can still enroll and pay a premium for Part A.

Some people qualify earlier. Those receiving Social Security Disability Insurance generally become eligible after 24 months of benefits. People diagnosed with ALS or end-stage renal disease qualify without that waiting period.

Timing deserves your attention. Your Initial Enrollment Period spans seven months. It opens three months before your 65th birthday month and closes three months after it. If you already collect Social Security, Medicare usually enrolls you automatically. Everyone else signs up directly.

Still working past 65 with solid employer coverage? The rules shift in that situation, and delaying Part B may make sense. That one is worth a conversation before you decide anything.

Medicare Advantage vs. Medicare Supplement: The Choice That Matters Most

Once you have Part A and Part B, you pick a path. Medicare.gov lays out how Medicare works as two main routes. You either stay with Original Medicare and add to it, or you join a Medicare Advantage plan.

You cannot do both at once. That is the single most important rule in this whole article. This is also the point where the Medicare basics stop being definitions and start being decisions.

Path one: Original Medicare plus a supplement

Original Medicare lets you see any provider who accepts Medicare, anywhere in the country. No networks. No referrals to see a specialist.

A Medicare Supplement plan then picks up much of what Original Medicare leaves for you to pay. That means deductibles, copayments, and coinsurance. These policies follow a standard design and carry letter names like Plan G or Plan N. Every insurer selling Plan G offers the identical set of benefits, which makes shopping refreshingly simple.

You pay more each month in premium. In exchange, your costs at the doctor’s office stay low and predictable. Drug coverage does not come included, so you add a separate Part D plan.

Timing is the catch here. Your Medigap Open Enrollment Period runs six months, beginning when you are both 65 and enrolled in Part B. Inside that window, no insurer can deny you or charge you more for health reasons. After it closes, most states let carriers ask health questions before approving you.

Path two: Medicare Advantage

A Medicare Advantage plan bundles Part A, Part B, and usually Part D into one private plan approved by Medicare. Private insurers run these plans under rules Medicare sets.

Premiums often run low, and some plans charge nothing beyond your Part B premium. Every plan caps your annual out-of-pocket spending, which Original Medicare alone does not do. Many plans also add dental, vision, hearing, and fitness benefits.

The tradeoffs are networks and rules. You generally need to use in-network doctors and hospitals for routine care. Some plans require a referral before you see a specialist. Certain services need the plan’s approval first.

The National Council on Aging published a thorough side-by-side look at Medicare Advantage and Medigap if you want to dig into the pros and cons yourself.

So which one is better?

Neither path wins for everyone. That answer sounds like a dodge, but it holds up.

Someone who travels often or splits the year between two states may love the freedom of Original Medicare with a supplement. Someone who stays local, likes their current network doctors, and wants extra benefits may prefer Medicare Advantage. Your prescriptions, your providers, and your budget all weigh in.

It also comes down to preference. Would you rather pay more each month and less at the point of care? Or pay less monthly and more when you use services? Both answers are reasonable. You can review all of the products we work with on our Medicare services page.

Where Prescription Drug Coverage Fits In

Part D covers prescriptions, and you get it one of two ways. You either add a standalone Medicare prescription drug plan alongside Original Medicare, or you pick a Medicare Advantage plan that already includes it.

Every plan publishes a formulary. That is simply the list of drugs it covers, sorted into tiers that determine your cost. Two plans with nearly identical premiums can price your specific medications very differently. Checking your actual prescription list against a plan’s formulary matters more than comparing premiums.

Enrolling on time matters too. Skipping drug coverage when you first become eligible can lead to a late enrollment penalty later on.

Putting the Medicare Basics Together

The Medicare basics really do come down to a short list. Sign up for Part A and Part B during your enrollment window. Choose between Original Medicare with a supplement or a Medicare Advantage plan. Add drug coverage that fits the prescriptions you actually take. Everything after that is detail, and details are what advisors are for.

Let’s Talk It Through

You do not have to figure this out alone. If you are aging into Medicare, or you have a feeling you are paying more than you should be, we would enjoy walking through it with you.

We will look at your doctors, your medications, and your budget. Then we will explain your options in plain English and let you decide. No pressure, no jargon, just a straight conversation. Schedule a time to talk with our team whenever you are ready.

Important Disclosures

Groberg Insurance Advisors is not connected with or endorsed by the United States government or the federal Medicare program. This content is provided for general educational purposes only. It is not medical, legal, or tax advice, and it does not describe the benefits of any specific plan. Plan availability, benefits, premiums, and cost-sharing amounts vary by location and change each calendar year. For complete and current information about all of your Medicare options, visit Medicare.gov or call 1-800-MEDICARE (TTY users: 1-877-486-2048), 24 hours a day, 7 days a week.

Medicare Basics: Parts A and B, How to Qualify, and Choosing Your Coverage