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5 Things to Know Before You Turn 65

Turning 65 is exciting — but it also comes with some of the most important healthcare decisions you'll make. Medicare enrollment isn't automatic for everyone, and the choices you make in the months around your birthday can affect your coverage and costs for years to come.

Here are five things every soon-to-be 65-year-old should know.

1. Your Enrollment Window Is Smaller Than You Think

Your Initial Enrollment Period (IEP) is a seven-month window: it starts three months before your 65th birthday month, includes your birthday month, and ends three months after.

That sounds like plenty of time, but it goes fast. If you miss this window, you'll have to wait for the General Enrollment Period (January through March), and you could face late-enrollment penalties that permanently increase your premiums.

The penalty for late Part B enrollment is 10% added to your premium for every 12-month period you were eligible but didn't sign up. That's not a one-time fee — it's for life.

2. Medicare Isn't Just One Thing

When people say "Medicare," they usually mean the whole system — but it's actually made up of distinct parts:

• Part A covers hospital stays, skilled nursing, and hospice care
• Part B covers doctor visits, outpatient care, and preventive services
• Part C (Medicare Advantage) bundles A and B through a private insurer, often with extras
• Part D covers prescription drugs

You'll need to decide between Original Medicare (Parts A + B, often paired with a Medigap plan and Part D) or Medicare Advantage (Part C, which typically includes drug coverage). Each path has real trade-offs, and the best choice depends on your doctors, medications, and how you use healthcare.

3. You May Already Be Enrolled — or You May Not Be

If you're already receiving Social Security benefits when you turn 65, you'll be automatically enrolled in Parts A and B. Your Medicare card will arrive in the mail about three months before your birthday.

But if you haven't started Social Security yet, you'll need to actively sign up through Social Security's website or your local office. Don't assume it happens automatically — that's one of the most common mistakes people make.

4. Your Medigap Window Is a One-Time Opportunity

If you choose Original Medicare and want a Medicare Supplement (Medigap) plan to help cover deductibles and coinsurance, your best chance to enroll is during your six-month Medigap Open Enrollment Period. This starts the month your Part B coverage begins.

During this window, insurance companies must accept you regardless of health conditions and can't charge you higher premiums for pre-existing conditions.

Once this window closes, it doesn't reopen. If you apply later, you may face medical underwriting and could be denied coverage entirely. This is one of the most overlooked — and costly — Medicare deadlines.

5. Free Help Exists — Use It

You don't have to figure this out alone, and you certainly don't have to pay for help. Licensed insurance agents who specialize in Medicare are compensated by insurance carriers, not by you. That means you get professional guidance at no cost.

A good agent will review your medications, check which doctors accept which plans, compare costs side-by-side, and help you enroll. They'll also be available year-round when questions come up — not just during enrollment season.

The worst Medicare mistake isn't choosing the wrong plan — it's not getting help and missing a deadline you didn't know existed.

The Bottom Line

Medicare doesn't have to be overwhelming. Start early, understand your timeline, and don't be afraid to ask questions. The decisions you make now will shape your healthcare coverage for years to come — and a little preparation goes a long way.