ANSWER FIRST: Your Initial Enrollment Period is seven months long: the three months before your birthday month, that month, and the three months after. Enroll in Part A and Part B (unless you have creditable employer coverage), then choose between a Medicare Supplement plus Part D or a Medicare Advantage plan.

Turning 65 Soon? Here's Exactly What You Should Do

If your mailbox has suddenly started filling up with Medicare mailers, you're not alone. The moment you get close to your 65th birthday, it can feel like every insurance company in America found out about it. It's a little overwhelming — and honestly, kind of funny. But underneath all that junk mail is a real and important question: What are you actually supposed to do when you turn 65? The good news is that it's not as complicated as it looks, and with a little guidance, you can make smart, confident decisions about your Medicare coverage.

Quick Answer

When you're turning 65, you should sign up for Medicare during your Initial Enrollment Period — a 7-month window that begins 3 months before your birthday month. Most people should also consider a Medicare Supplement plan (also called Medigap) to cover the out-of-pocket costs that Original Medicare doesn't pay. Acting during the right window protects you from penalties and guarantees your access to the best coverage options.

Why Turning 65 Is Such an Important Milestone

Turning 65 isn't just a birthday — it's the moment you become eligible for Medicare, the federal health insurance program that covers tens of millions of Americans. For most people, this is the biggest change to their health coverage since they first got a job with benefits. The decisions you make in the months around your 65th birthday can affect your coverage, your costs, and even your ability to get certain plans for the rest of your life. That's why it's worth slowing down, ignoring the marketing noise, and understanding exactly what your choices are.

Step 1: Understand Your Enrollment Window

What Is the Initial Enrollment Period?

The Initial Enrollment Period (IEP) is your first opportunity to sign up for Medicare, and it lasts for 7 months total. Here's how it breaks down:

3 months before your birthday month
Your birthday month itself
3 months after your birthday month

For example, if your birthday is in June, your Initial Enrollment Period runs from March 1 through September 30. That's your window to get enrolled without any penalties.

If you miss this window and don't have a valid reason for the delay (more on that in a moment), you could face a late enrollment penalty on your Part B premium — and that penalty stays with you permanently. For Part B, the penalty is 10% added to your monthly premium for every 12-month period you were eligible but didn't enroll. That adds up fast.

When Should You Actually Sign Up?

The best time to sign up is during the first 3 months of your IEP — that's the 3 months before your birthday month. If you sign up during or after your birthday month, your coverage start date may be delayed by one to three months, which could leave you with a gap.

There is one important exception: if you're still working at 65 and you're covered by an employer health plan through a current employer (yours or your spouse's), you may qualify for a Special Enrollment Period. This allows you to delay Medicare Part B without penalty and sign up later when your employer coverage ends. If this applies to you, it's worth confirming with your HR department and Social Security before making any decisions.

Step 2: Know What Medicare Covers (and What It Doesn't)

Original Medicare has two main parts:

Part A covers hospital stays, skilled nursing facility care, hospice, and some home health care. Most people don't pay a premium for Part A because they or their spouse paid Medicare taxes for at least 10 years while working.

Part B covers doctor visits, outpatient care, preventive services, and medical equipment. In 2026, the standard Part B premium is $202.90 per month, and the annual deductible is $283.

Together, Parts A and B cover a lot — but they don't cover everything.

The Coverage Gap You Need to Know About

Here's something many people don't realize until it's too late: Original Medicare only pays 80% of most approved medical costs after you meet your deductible. You're responsible for the other 20% — and there is no out-of-pocket maximum.

That means if you have a serious illness, a major surgery, or a long hospital stay, your 20% share could climb into the thousands or even tens of thousands of dollars. There's no limit to what you could owe. This is one of the biggest financial risks for people on Medicare, and it's exactly why so many people look into Medicare Supplement plans for extra protection.

Step 3: Consider a Medicare Supplement Plan

What Is a Medicare Supplement Plan?

A Medicare Supplement plan — also called Medigap — is a private insurance policy that works alongside Original Medicare. It doesn't replace Medicare; it fills in the gaps. Depending on the plan you choose, a Medigap policy can cover your Part B coinsurance (that 20%), hospital costs, deductibles, and more. You keep your Original Medicare, and your Medigap plan picks up some or all of what Medicare doesn't pay.

When you compare Medicare Supplement plans, you'll notice they're standardized by the federal government. That means a Plan G from one company offers the exact same benefits as a Plan G from another company. The difference is the price — and sometimes the customer service.

How Much Do Medicare Supplement Plans Cost in 2026?

Prices vary by location, age, gender, and tobacco use, but here are some helpful national averages for a 65-year-old enrolling in 2026:

Plan G: approximately $165.85/month — one of the most popular choices, covering nearly all out-of-pocket costs after the Part B deductible
Plan N: approximately $122.98/month — a lower-cost option with some copays for office and emergency room visits
Plan F: approximately $220.14/month — the most comprehensive plan, but only available to people who became eligible for Medicare before January 1, 2020

If you became eligible for Medicare on or after January 1, 2020, Plan F is not available to you. Plan G is generally considered the next best option.

Your Medigap Open Enrollment Window Is Critical

Here's one of the most important pieces of Medicare help you'll ever receive: you have a 6-month Medigap Open Enrollment Period that begins the month you are both 65 or older and enrolled in Medicare Part B. During this window, insurance companies are required to sell you any Medigap policy they offer at standard rates — no medical questions, no health screenings, no denials. This is called guaranteed issue.

Once this 6-month window closes, insurers in most states can review your health history and may charge you more or deny you coverage altogether. This is not a window you want to miss. It only comes around once, and it's one of the strongest consumer protections in the entire Medicare system.

Step 4: Don't Forget About Part D (Prescription Drug Coverage)

Here's something that surprises a lot of people turning 65: Original Medicare — Parts A and B — does not cover most prescription drugs. That's where Medicare Part D comes in.

Part D is a separate plan you add on to cover your medications. These plans are offered by private insurance companies and are available in every state. Premiums, copays, and the list of covered drugs (called a formulary) vary from plan to plan, so it pays to compare your options carefully.

Why you shouldn't wait: If you don't sign up for Part D when you're first eligible — and you don't have other creditable drug coverage, like through an employer or union — you'll face a late enrollment penalty. That penalty gets added to your Part D premium permanently, for as long as you have Medicare. It's not a one-time fee. It follows you.

The penalty is calculated as 1% of the national base beneficiary premium for every month you went without coverage. It doesn't sound like much, but it adds up quickly over the years.

The bottom line: Even if you're healthy right now and don't take any regular medications, seriously consider enrolling in a low-cost Part D plan just to protect yourself from the penalty. Medications can become necessary quickly, and locking in coverage now is almost always the smarter move.

Step 5: Avoid These Common and Costly Medicare Mistakes

Most Medicare mistakes are totally avoidable — but only if you know what to watch out for. Here are the ones that catch people off guard most often.

Waiting too long to enroll and missing your Initial Enrollment Period

Your IEP is a 7-month window. Miss it, and you could face late enrollment penalties for Part B and Part D — and you may have to wait months before your coverage kicks in. Mark your dates and treat them like a deadline.

Choosing a plan based only on the lowest premium

A rock-bottom premium might look great upfront, but if the plan doesn't cover your doctors, your medications, or your preferred hospitals, it can cost you far more in the long run. Always look at the full picture — not just the monthly price.

Skipping Part D because "I don't take any medications right now"

This is one of the most common and costly mistakes people make when turning 65. Going without Part D coverage — even for a few months — can trigger a penalty you'll carry forever. A low-cost plan now is cheap insurance against a much bigger expense later.

Missing the Medigap open enrollment window

As we covered in Step 3, your Medigap open enrollment period is only 6 months long, and it starts the month you turn 65 and are enrolled in Part B. During this window, insurance companies cannot turn you down or charge you more because of health conditions. After it closes, they can — and often do. Don't let this window close without making a decision.

Not comparing plans — rates vary significantly between companies for the same coverage

Here's something most people don't realize: two different insurance companies can sell the exact same Medigap plan — with the exact same benefits — at very different prices. Medicare Supplement plans are standardized by the government, which means Plan G from one company works identically to Plan G from another. The only real difference is cost. If you don't compare Medicare Supplement plans, you could easily be paying more than you need to every single month.

What You Should Do Next

Turning 65 is a big milestone, and getting your Medicare coverage right from the start sets you up for years of peace of mind. Here's a simple action plan to follow:

Mark your enrollment dates. Find out exactly when your Initial Enrollment Period begins and ends, and put those dates somewhere you'll see them.
Compare Medicare Supplement plans in your area. Rates and availability vary by location, so it's worth shopping around before you commit.
Look into Part D coverage. Review your current medications and compare Part D plans to find one that fits your needs and budget.
Get help if you need it. Free Medicare resources and counseling are available. You don't have to figure this out alone.

Ready to Take the Next Step?

If you're approaching 65 and want to compare Medicare Supplement rates in your area, medicaresavingschecks.com is a free, easy-to-use tool that lets you see current Medigap rates side by side. It takes just a couple of minutes and can help you spot real savings on coverage that's identical no matter who you buy it from.

For broader Medicare help, guidance, and additional resources as you work through your decisions, visit SeniorResourceFinders.com. It's a trusted hub built to connect people with the Medicare information and support they actually need.

Taking a little time now to understand your options and enroll correctly is one of the best things you can do for your health — and your wallet — in the years ahead. You've earned these benefits. Make sure you get the most out of them.

Have questions about your Medicare coverage? You can also fill out the contact form on MedSuppUSA.com and one of our licensed Kansas Medicare agents will reach out to help you compare your options - at no cost and with no obligation.