Why Your Zip Code Changes Everything About Medigap Pricing
Your neighbor two towns over might pay $40 less a month for the exact same Medigap plan from the exact same insurance company. That’s not a fluke. That’s how Medigap pricing works, and it’s why searching by zip code isn’t just a convenience feature — it’s the only way to get a number that means anything to you.
Medigap plans are standardized by the federal government. Plan G in Florida covers the same benefits as Plan G in Montana. The coverage is identical. What isn’t identical is the premium, and that premium is set at the state and sometimes the county or zip code level. Insurers file their rates with each state’s insurance department, and those rates can vary significantly even within the same metro area.
Here’s the thing: a lot of people look up national “average” Plan G premiums and assume that’s roughly what they’ll pay. I’ve seen people budget $130 a month based on something they read online, then find out they’re in a high-cost rating area and they’re actually looking at $185. That’s a $660-a-year surprise, and it happens constantly.
The reason insurers rate by geography has to do with local healthcare costs, provider networks (even though Medigap has no networks), and the claims history in a given area. Florida has historically high utilization. Rural states often have different cost dynamics. Your zip code is a proxy for all of that risk, which is why you can’t skip it.
The Right Way to Search for Plans in Your Area
The first place most people go is Medicare.gov’s plan finder tool. It’s free, it’s government-run, and it does allow you to search by zip code. You enter your zip, select your coverage type, and it pulls up available Medigap plans in your area with estimated premium ranges. That’s a reasonable starting point, but I want to be direct: it’s a starting point only.
The government tool doesn’t always show every insurer operating in your zip code, and the premium ranges it shows can be wide enough to be nearly useless. Seeing “$110-$190/month” for Plan G doesn’t tell you what you’ll actually pay as a 68-year-old non-smoker in Pinellas County, Florida.
What actually works is going through an independent Medigap broker who runs quotes across multiple carriers for your specific zip code, age, gender, and tobacco status. These brokers are licensed in your state and compensated by the insurers, not by you. There’s no extra cost for using one. I genuinely believe this is the better path for most people over 65, because a broker can pull real-time quotes from 15 or 20 carriers in about five minutes and sort them by price.
If you want to do it yourself, go directly to the major carriers’ websites — Mutual of Omaha, Aetna, Blue Cross Blue Shield (which operates differently by state), United American, and others. Enter your zip code and get an actual quote. Then compare. It’s tedious, but it works. The trap is stopping at one or two carriers and assuming you’ve seen the market.
What the Quotes Are Actually Showing You (and What They’re Hiding)
When you get a Medigap quote by zip code, you’re typically seeing the current monthly premium for a specific plan at your age. What you might not be seeing is how that premium is going to change over time. That depends on the insurer’s rating method, and it matters more than most people realize.
| Rating Method | How Premiums Change | Best For |
|---|---|---|
| Community-rated | Same price for everyone in the area, regardless of age. Increases are inflation-driven only. | People who expect to keep the policy long-term |
| Issue-age rated | Locked to your age when you enrolled. Younger buyers pay less forever relative to older buyers. | People enrolling at 65 in a stable state |
| Attained-age rated | Premium increases every year as you get older, plus inflation. Starts low, gets expensive. | Nobody. It looks good at first, but you’ll pay for it. |
Most states use attained-age rating, which means that $115/month Plan G looks great at 65 but might be $190 by the time you’re 75. The quote by zip code will show you today’s premium. You have to ask the broker or insurer directly: “How is this policy rated?” That question alone can save you thousands over a decade.
Also, the 2026 Part B deductible is $257, and the Part A deductible per benefit period in 2026 is $1,676. Plan G covers the Part A deductible but not the Part B deductible. That’s baked into the coverage, regardless of where you live. Your zip code changes the price, not the benefits.
The Biggest Mistake People Make When Searching by Zip Code
I’ve seen this mistake more times than I can count: someone searches for Medigap plans in their zip code during their open enrollment window, finds a price they like, and then waits. Maybe they want to “think about it.” Maybe they’re not sure which plan they want. Then they turn 66, or 67, and they try to enroll again. And that’s when they discover that guaranteed issue rights are gone.
Your Medigap Open Enrollment Period is a one-time, six-month window that starts the month you’re both 65 and enrolled in Medicare Part B. During that window, no insurer can reject you or charge you more based on your health. After it closes, most states let insurers use medical underwriting, which means they can look at your health history and either deny you or charge you significantly more.
So yes, search by zip code. Compare plans. But treat that window as a deadline, not a suggestion. A 67-year-old in Ohio with well-controlled diabetes told me she’d been meaning to enroll “when she got around to it.” She tried to enroll at 67 and was denied by four carriers. The fifth offered her a plan at roughly 35% more than she would have paid at 65. That’s a real cost attached to that procrastination.
The misconception underneath all this is that Medigap is like other insurance you can shop anytime. It’s not. Your zip code search needs to happen at the right time, not just at the right website.
Plan G vs. Plan N: Which Should You Be Looking At?
When you’re searching by zip code, you’re going to see a list of available plans. The two worth your serious attention in 2026 are Plan G and Plan N. Plan F is no longer available to people who became eligible for Medicare after January 1, 2020.
Plan G covers almost everything: the Part A deductible, skilled nursing facility coinsurance, Part B excess charges, and foreign travel emergency care. You only pay the 2026 Part B deductible of $257 per year out of pocket. After that, you pay nothing on covered services. That predictability is worth something real, especially if you have chronic conditions or see specialists regularly.
Plan N costs less per month, typically $20-$40 less than Plan G depending on your zip code, but it comes with copays: up to $20 for office visits and up to $50 for emergency room visits. It also doesn’t cover Part B excess charges, which matter if your doctors don’t accept Medicare assignment.
My honest take: for most people at 65, Plan G is worth the slightly higher premium. The math usually favors Plan N if you’re genuinely healthy and rarely see doctors, but “rarely see doctors” at 65+ is a status that has a way of changing. I’d rather pay a bit more now and not think about it than be surprised by a $50 ER copay when I’m sick enough to be in an emergency room.
That said, if you’re 65, healthy, on a tight budget, and primarily looking for protection against catastrophic costs, Plan N is a legitimate choice. Just check whether your doctors accept Medicare assignment before you commit.
Bottom Line
Search for Medicare supplement plans by zip code using either Medicare.gov or, better yet, an independent broker who can pull quotes from 15 or more carriers at once. For most people turning 65, Plan G is the right choice, and the right time to enroll is during your six-month Medigap Open Enrollment window. Don’t wait.
FAQ
Can I use any zip code to get Medigap quotes, or does it have to be exact?
It has to be your actual residential zip code. Insurers file rates by state and sometimes by county or zip code, and you’re required to enroll based on where you live. Using a different zip code to see lower rates won’t help you, because you’ll be quoted the correct rate when you actually apply.
Why does my zip code affect Medigap prices if the coverage is the same everywhere?
Insurers base premiums on the local cost of healthcare services, historical claims in the area, and the competitive landscape in your state. The benefits are federally standardized, but the price you pay to get those benefits is set at the state or local level. It’s the same reason car insurance costs more in certain cities even if you’re driving the same car.
Do all insurers offer Medigap plans in every zip code?
No. Some carriers operate in only certain states or regions. That’s another reason to search by your specific zip code rather than assuming a carrier you’ve heard of is available where you live. In some rural areas, you may have fewer choices than someone in a major metro market.
What if I missed my Medigap Open Enrollment window? Can I still search and apply?
You can still search and apply, but you’ll likely face medical underwriting. That means the insurer can review your health history and either deny coverage or charge you a higher premium. A handful of states, including New York, Connecticut, and Massachusetts, have continuous open enrollment or different rules, so check your state’s specific regulations. If you’re outside your window in most states, work with a broker who knows which carriers are most likely to approve people with your specific health profile.
