Turning 65 is a milestone worth celebrating.

It’s also the moment Medicare shows up at your door — and if you’ve never had to think about it before, the experience can feel a little like being handed a 500-page instruction manual in a language you’ve never studied.

Parts A, B, C, and D. Supplements. Advantage plans. Enrollment windows. Premium surcharges. It’s a lot — and the stakes are high enough that confusion can be genuinely costly.

So, let’s slow it down and start from the beginning.

What Medicare Actually Is

Medicare is the federal health insurance program for people 65 and older, as well as certain younger people with qualifying disabilities. It’s not free, it’s not automatic for everyone, and it doesn’t cover everything — three things that surprise people more often than you’d think.

It’s divided into parts, each covering different things:

Part A — Hospital Insurance
Part A covers inpatient hospital stays, skilled nursing facility care, hospice care, and some home health services. For most people, Part A comes with no monthly premium because you paid into it during your working years. However, it does come with deductibles and cost-sharing that are worth understanding before you need them.

Part B — Medical Insurance
Part B covers outpatient care — doctor visits, preventive services, lab work, and medical equipment. Unlike Part A, Part B comes with a monthly premium. In 2024, the standard premium was $174.70 per month, though higher-income beneficiaries may pay more through what’s called IRMAA.

Part D — Prescription Drug Coverage
Part D covers prescription medications and is offered through private insurance companies approved by Medicare. Plans vary significantly in terms of which drugs they cover and what they cost, so choosing the right Part D plan for your specific medications matters more than most people realize.

Part C — Medicare Advantage
Part C — also known as Medicare Advantage — is an alternative way to receive your Medicare benefits through a private insurer rather than original Medicare. These plans typically bundle Parts A, B, and often D together, and may include additional benefits like dental or vision. We’ll come back to this when we talk about your coverage options.

The Enrollment Windows You Can’t Afford to Miss

This is where a lot of people get tripped up — and where the consequences can be surprisingly lasting.

Your Initial Enrollment Period is a seven-month window that begins three months before the month you turn 65, includes your birthday month, and extends three months after. This is your primary opportunity to sign up for Medicare without penalty.

Miss that window, and you may face a late enrollment penalty that gets added to your premium permanently — not just for a year or two, but for as long as you have Medicare coverage.

There are exceptions — if you’re still working and covered by an employer health plan, for example, different rules apply. But those exceptions have their own timelines and requirements, which is exactly why it’s worth getting clear on your specific situation well before you turn 65.

Original Medicare vs. Medicare Advantage — What’s the Difference?

Once you’re enrolled in Medicare, you face one of the most significant coverage decisions of your retirement: do you stay with Original Medicare, or do you switch to a Medicare Advantage plan?

There’s no universal right answer — but here’s a straightforward way to think about it:

Original Medicare gives you broad flexibility. You can see any doctor or specialist in the country who accepts Medicare — no referrals required, no network restrictions. Most people pair it with a Medicare Supplement plan (also called Medigap) to help cover the out-of-pocket costs that Original Medicare doesn’t pay, and a separate Part D plan for prescriptions.

Medicare Advantage bundles everything together through a private insurer and often includes extra benefits like dental, vision, and hearing coverage. Premiums can be lower — sometimes zero — but these plans typically come with provider networks, referral requirements, and prior authorization processes that can limit your flexibility, particularly if you need specialist care or travel frequently.

The right choice depends on your health needs, your preferred doctors, your budget, and how much flexibility matters to you. It’s a decision worth thinking through carefully — ideally with someone who can help you compare your specific options.

What Medicare Doesn’t Cover

This one catches people off guard more than almost anything else.

Original Medicare does not cover routine dental care, routine vision, hearing aids, or long-term care — things that become increasingly relevant as you age. These gaps are real, and planning for them is an important part of your overall retirement healthcare strategy.

Long-term care in particular — the kind of ongoing personal care you might need if you’re unable to manage daily activities on your own — represents one of the most significant unplanned expenses in retirement. It’s worth having that conversation separately and well in advance.

Start Earlier Than You Think You Need To

Medicare decisions have a way of feeling distant until they’re suddenly urgent. The enrollment windows are unforgiving, the coverage options are genuinely complex, and the choices you make at 65 can follow you for decades.

The good news is that with a little runway, none of this has to be stressful. Understanding your options before you’re forced to decide is the difference between a confident choice and a rushed one.

And if you’re approaching 65 and haven’t started thinking about Medicare yet — now is a great time to start.

Have questions about how Medicare fits into your broader retirement plan? Schedule a complimentary first visit with the team at True Financial Partners — we’re happy to help you make sense of it all.

Frequently Asked Questions

When should I sign up for Medicare?
Your Initial Enrollment Period is a seven-month window starting three months before the month you turn 65. Signing up during this window avoids late enrollment penalties, which can be permanent. If you’re still working and covered by an employer plan, different rules may apply — worth confirming well before your 65th birthday.

Does Medicare cost anything?
Most people pay no premium for Part A. Part B comes with a monthly premium — $174.70 in 2024 for most beneficiaries — and higher-income individuals may pay more. Part D and supplemental coverage carry their own costs depending on the plan you choose.

What is the difference between Medicare Supplement and Medicare Advantage?
Medicare Supplement (Medigap) works alongside Original Medicare to help cover out-of-pocket costs, with broad provider flexibility and no network restrictions. Medicare Advantage replaces Original Medicare through a private insurer, often bundling additional benefits but typically with network limitations and referral requirements.

What does Medicare not cover?
Original Medicare does not cover routine dental, vision, or hearing care, and it does not cover long-term care. These gaps are significant and worth planning for as part of your broader retirement healthcare strategy.

What is IRMAA?
IRMAA stands for Income Related Monthly Adjustment Amount — a surcharge added to Medicare Part B and Part D premiums for higher-income beneficiaries. It’s based on your income from two years prior, so a large taxable event can unexpectedly increase your Medicare costs.

Can I change my Medicare coverage after I enroll?
Yes — Medicare has an Annual Enrollment Period each year from October 15th through December 7th, during which you can make changes to your coverage. Changes take effect January 1st of the following year.