How much does a Medicare Supplement cost at age 65?

Rates vary by carrier, plan letter, zip code, and tobacco status. At 65 during your open enrollment window, you'll qualify for the lowest available rates because carriers cannot charge more for pre-existing conditions. Call 855-559-1700 for a personalized comparison.

What happens if I miss my 6-month Medigap open enrollment period?

After your 6-month window closes, carriers can use medical underwriting to decide whether to accept your application and how much to charge. If you have health issues, you could be denied coverage or face higher premiums. This window does not repeat annually.

Should I pick Plan G or Plan N at 65?

Plan G covers everything Original Medicare doesn't except the Part B deductible ($283/year in 2026). Plan N has lower premiums but charges up to $20 copays for some office visits and up to $50 for ER visits that don't result in admission. If you want predictable costs, Plan G is usually the stronger choice at 65.

Can I apply for a Medicare Supplement before I turn 65?

Yes. You can apply up to 6 months before your Part B start date to lock in your rate and have coverage ready on day one. This is the approach I recommend to every client approaching 65.

Medicare Supplement for Seniors Turning 65: Your One Best Window for Low Rates

Medicare supplement for seniors turning 65 comes with a one-time pricing advantage that most people don't fully understand until it's gone. Federal law gives you exactly six months of guaranteed-issue access to any Medigap plan sold in your state, at the lowest rates you'll ever see.

I'm Anthony Orner, a licensed Medicare broker. I walk people through this window every week. Here's what you actually need to know.

Call for Free Advice — 855-559-1700

Why your 6-month open enrollment window is worth protecting

Your Medigap Open Enrollment Period starts the first month you're both 65 or older AND enrolled in Part B. During those six months, no carrier can reject you, charge extra for health conditions, or make you wait for coverage.

This window does not come back every year. Miss it, and insurers can medically underwrite you. That means higher rates or flat-out denial if you have any health history. Protect this window like it matters, because it does.

Plan G vs Plan N for new enrollees at 65

Both plans are standardized, meaning the benefits are identical carrier to carrier. The difference is between the two letters:

Plan G: Covers all Original Medicare gaps except the Part B deductible ($283/year in 2026). No copays. No surprises.
Plan N: Lower monthly premium, but you'll pay up to $20 copays for some office visits and up to $50 for ER visits that don't lead to inpatient admission.

For most new enrollees at 65 who want predictable costs, Plan G wins on simplicity. Plan N can save money if you're healthy and rarely visit doctors.

How attained-age pricing affects your premium every year

Most Medigap carriers use attained-age pricing. Your premium goes up as you age, automatically. That's the predictable part.

The less predictable part? Block rate increases. When claims rise within your insurer's pool of policyholders, everyone shares the cost. Stack both together and 10-18% annual jumps are not unusual.

The carrier you choose matters as much as the plan letter. I compare long-term rate stability across carriers, not just the cheapest starting premium.

Step-by-step enrollment timeline before your 65th birthday

6 months before you turn 65: Apply for your Medigap plan. Carriers will hold your application until coverage starts.
3 months before: Sign up for Medicare Parts A and B through Social Security (if you're not already enrolled).
Month you turn 65: Your Medigap Open Enrollment Period begins. Coverage can start the 1st of your birthday month.
Don't forget Part D: Medigap does not cover prescriptions. You'll need a standalone drug plan.

Still working at 65? Here's what changes

If you or your spouse have employer coverage, you can delay Part B without penalty. Your Medigap open enrollment window doesn't start until Part B does.

When you do retire and enroll in Part B, your 6-month guaranteed issue window kicks in at that point. Don't let anyone rush you into dropping employer coverage before you're ready. But don't wait to call either. Planning ahead avoids gaps.

Why the carrier matters as much as the plan

A Plan G from one carrier has the exact same medical benefits as a Plan G from any other. That's federal law. What's not identical: premium trajectory, claims behavior, and customer service.

Some carriers price aggressively low to attract new enrollees, then raise rates steeply once you're in. I track carrier rate histories so you're not just chasing the cheapest first-year number.

Get a free Medigap quote before your window closes.

Call 855-559-1700 or Get a Free Quote online. I'll compare carriers side by side for your zip code.