Turning 65? Here's Exactly What You Need to Do About Medicare

Your 65th birthday is a big milestone — and for most Americans, it's also the moment Medicare becomes available. But Medicare enrollment doesn't work quite the way most people expect. There are specific windows, specific rules, and specific consequences if you miss them. This guide walks you through everything clearly, step by step.

When Medicare Coverage Becomes Available

Most people become eligible for Medicare at age 65. If you were born in the United States or are a permanent resident who has lived in the country for at least five years, you qualify — as long as you or your spouse worked and paid Medicare taxes for at least 10 years (40 quarters).

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

If you're NOT yet receiving Social Security benefits — for example, if you're still working or you delayed claiming Social Security — you need to sign up for Medicare yourself. It does not happen automatically.

Your Initial Enrollment Period (IEP)

The Initial Enrollment Period is a 7-month window centered around your 65th birthday:

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

For example, if your birthday is June 15, your IEP runs from March 1 through September 30.

When you enroll matters. If you sign up during the three months before your birthday month, your coverage typically starts on the first day of your birthday month. If you enroll during your birthday month or after, coverage is delayed. The later you enroll within the IEP, the longer you wait for coverage to kick in.

The takeaway: if you want coverage to start on time, enroll early in your IEP — ideally in that first three-month window.

What You're Signing Up For

Medicare has multiple parts. During your IEP, you'll be enrolling in:

Part A (Hospital Insurance): Covers inpatient hospital stays, skilled nursing facility care, some home health care, and hospice. Most people pay no monthly premium for Part A if they or their spouse worked long enough.

Part B (Medical Insurance): Covers doctor visits, outpatient services, preventive care, and durable medical equipment. Part B does have a monthly premium — in 2025, the standard amount is $185.00 per month, though higher-income individuals pay more.

You may also want to explore Part D (prescription drug coverage) and Medicare Advantage (Part C) plans during this time. These have their own enrollment rules but often align with the IEP.

What Happens If You Miss Your Initial Enrollment Period

This is where people get into trouble. If you don't sign up for Part B when you're first eligible and you don't have other qualifying coverage, you may face a late enrollment penalty.

The Part B late penalty adds 10% to your monthly premium for every 12-month period you were eligible but didn't enroll. That penalty is permanent — you carry it for as long as you have Medicare.

Part D (drug coverage) has its own late penalty too: 1% of the national average premium for every month you went without creditable drug coverage. Again, this is permanent.

These penalties add up significantly over a 20- or 30-year retirement. Avoiding them is one of the most important things you can do for your financial health in retirement.

Exceptions: When You Can Delay Without Penalty

There are valid reasons to delay Medicare Part B without penalty — but the rules are specific.

If you are still actively working at 65 and covered by employer-sponsored health insurance through your own current employer (or your spouse's current employer), you may be able to delay Part B. Once that employment or coverage ends, you'll have a Special Enrollment Period to sign up.

However, COBRA coverage and retiree health coverage do NOT qualify as exceptions. If you rely on either of those past age 65 and delay Medicare, you could still face penalties.

The size of the employer matters too. If you work for a company with fewer than 20 employees, Medicare is typically your primary insurer at 65 — even if you're still working. In that case, you generally should enroll on time.

Your Action Checklist for Turning 65

1. Three months before your birthday: Gather your Social Security information and determine whether you're auto-enrolled or need to sign up manually.
2. Log in to ssa.gov or visit your local Social Security office to complete enrollment if needed.
3. Decide on Part D and supplement coverage: Think about prescription drug needs and whether Original Medicare alone, a Medigap plan, or Medicare Advantage is a better fit.
4. Confirm your current employer coverage status if you're still working, and understand how your employer plan coordinates with Medicare.
5. Keep your Medicare card safe when it arrives — you'll need it at every doctor visit.

Medicare is one of the most important benefits you'll ever use. Getting the enrollment right at 65 sets up your healthcare for the decades ahead.

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Have questions? Call 1-877-443-3251 for free, no-obligation help from a licensed agent.

This is an educational website and is not affiliated with or endorsed by Medicare or any government agency. We connect consumers with licensed insurance agents who can help with Medicare enrollment. Not all plans or options are available in all areas. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) to get information on all of your options.