When it comes to Medigap vs Medicare Advantage, most people don’t realize they’re making one of the most important financial decisions of their retirement. When most people turn 65 and start looking at Medicare, they run into the same wall.
The plans look similar on the surface. The names are confusing. Everyone seems to have a different opinion. And somewhere in the middle of all of it, you’re supposed to make a decision that affects your healthcare — and your wallet — for years to come.
So let’s cut through it.
The single biggest decision you’ll make when you enter Medicare is choosing between Medicare Advantage and Medicare Supplement (Medigap). Everything else — which carrier, which specific plan — comes after that. And the best way I know to explain the difference is this: one is buying a car. The other is leasing one.
Let’s walk through both — what they are, how they actually work, what they cost, and who should be helping you make this call.
First: What Original Medicare Covers (And What It Doesn’t)
Before we compare your two paths, you need to understand what Original Medicare (Parts A and B) actually gives you — and where it leaves you exposed.
Part A covers inpatient services: hospital stays, skilled nursing, hospice. Part B covers outpatient services: doctor visits, ER, ambulance, outpatient surgery. Part D covers prescription drugs — available as a standalone plan or bundled into Part C.
Here’s the problem: Original Medicare covers a lot, but it doesn’t cap what you pay. There are deductibles, copays, and coinsurance — and no annual out-of-pocket maximum. That means if something serious happens, your costs under Original Medicare alone are technically unlimited. That gap is exactly what Medicare Advantage and Medigap are designed to fill. They just do it in completely different ways.
The Big Decision: Are You Buying or Leasing?
Think of it this way: Medigap = Buying the car. Higher monthly payment. But once you own it, it’s yours — predictable, reliable, no surprises. Medicare Advantage = Leasing the car. Little to no monthly payment. Extra features included. But the lease terms can change year to year. Neither is wrong. But they work very differently — and what looks like the better deal at 65 may not be the better deal at 72.
Buying the Car: Medigap (Medicare Supplement)
Medigap is a private insurance policy that works alongside Original Medicare. You keep Medicare as your primary coverage — Medigap picks up most of what Medicare doesn’t pay. The most popular plan right now is Plan G. Here’s what it looks like in practice:
Monthly premium: Higher than Medicare Advantage — in the Tampa Bay market right now, Plan G runs approximately $270/month for a female nonsmoker and $300/month for a male nonsmoker at age 65, and it increases every year. Annual Part B deductible: You pay this once per year ($283 in 2026), then you’re essentially done. After that: Medicare pays 80%, Plan G pays the other 20% — on almost everything Medicare approves. Networks: None. You can see any doctor, specialist, or hospital in the country that accepts Medicare — no referrals, no permission, no surprises. Terms: What you buy is what you have. The coverage itself never changes — only the premium can go up.
The tradeoff: That monthly premium is real money, and it climbs every year. For someone who stays relatively healthy and doesn’t use their coverage much, they may pay more over time than a Medicare Advantage enrollee would. The Toyota: Costs more to own. But it just works, every time, anywhere.
Leasing the Car: Medicare Advantage
Medicare Advantage is a private insurance plan that replaces Original Medicare. Instead of Medicare paying your claims directly, a private insurer — Humana, UnitedHealthcare, Aetna, and others — runs your coverage under contract with Medicare. Here’s what that looks like:
Monthly premium: Little to no premium on top of your Part B premium — many plans in Florida are $0. Extra benefits: Dental, vision, hearing, gym membership, Part B rebate, grocery/OTC cards — things Medigap doesn’t include. Cost-sharing: You pay copays each time you use the plan — costs vary significantly by plan type. Primary Care visits can range from $0 to $10, specialist visits from $0 to $55, and hospital stays from $65 to $550 per day. Out-of-pocket maximum (MOOP): Once you hit the annual limit, you pay nothing for the rest of the year — MOOP starts as low as $500 and can run up to $9,350 (the CMS maximum). Networks: Plans operate within a network. Out-of-network care may cost more or not be covered at all (except emergencies). Terms: Your plan can change every year. Benefits, copays, networks, and premiums are all subject to your Annual Notice of Change (ANOC).
The tradeoff: The low upfront cost is real. So are the extra benefits. But you’re leasing — the terms aren’t yours to keep.
If You’re Leasing — What Kind of Vehicle?
Once you decide Medicare Advantage makes sense for you, there’s a second decision: HMO or PPO?
HMO — The City Lease
Think of an HMO like leasing a car that’s great in town but doesn’t go out of state. Lowest copays and most extra benefits of any Medicare Advantage plan type. Several plans offer a monthly Part B premium rebate, OTC allowance, and some even include a grocery benefit — depending on the plan and county. Referrals required from your primary care physician to see specialists. Stay in network — out-of-network care is generally not covered except in emergencies. Best for people who stay local, want maximum extras, and are comfortable with a coordinated care model.
PPO — The Freedom Lease
Think of a PPO like a lease with more mileage and a larger service area. No referrals required — see specialists directly. Larger network, often regional or national — more flexibility for travel. Higher copays and fewer extra benefits than HMO plans. Good for someone who wants flexibility without committing to a full Medigap purchase — but understands it comes at a higher cost per use.
| HMO — City Lease | PPO — Freedom Lease | |
|---|---|---|
| Monthly Premium | Usually $0 | Usually $0 |
| Copays | Lower | Higher |
| Network | Local | Regional/National |
| Referrals | Required | Not Required |
| Extra Benefits | Most (OTC, Part B rebate, food card) | Some — less than HMO |
| Terms | Can change annually | Can change annually |
The 12-Month Test Drive
Here’s something most people don’t know — and it matters. When you first turn 65 and enroll in Medicare, you have a protected window. If you start with Medicare Advantage and decide within the first 12 months that it’s not right for you, you have a guaranteed right to switch to Medigap — no health questions asked.
After that window closes, the rules change. In Florida, Medigap insurers can use medical underwriting after your initial enrollment period. That means they can charge you more — or decline you entirely — based on your health history. This is why timing matters so much. The decision you make at 65 is easier to reverse than the one you make at 70.
The Full Comparison
| Medigap (Plan G) | Medicare Advantage (HMO) | Medicare Advantage (PPO) | |
|---|---|---|---|
| Monthly Premium | Higher, increases annually | Usually $0 | Usually $0 |
| Coverage | Near-zero out of pocket after deductible | Copays until MOOP | Higher copays until MOOP |
| Network | Any Medicare provider, nationwide | Local network, referrals required | Regional/national, no referrals |
| Extra Benefits | None (Part D not included) | Dental, vision, gym, OTC, Part B rebate | Some extras, less than HMO |
| Terms | Coverage never changes (only premium) | Can change annually (ANOC) | Can change annually (ANOC) |
| Switching Later | Possible but subject to underwriting | Can switch during AEP/OEP | Can switch during AEP/OEP |
Now — Who Do You Want Helping You?
Here’s the part most people don’t think about until it’s too late. The plan matters. But the agent you choose to help you matters the most.
The Carvana Lot — Call Center Agents
Have you ever bought a car online like Carvana? We haven’t. They may have great pictures and sound great on paper — but who do you call when you have a problem or a question? That’s exactly what a call center Medicare agent is. You dial an 800 number, get whoever picks up, and they may be in another state handling hundreds of calls that day. New agent every call. Working a quota. And when you have a question in March — not during enrollment season — you’re on your own.
The Toyota Dealership — Captive Agents
Toyota makes a great car. No argument there. But walk into a Toyota dealership and that’s all they can sell you — a Toyota. A captive agent works the same way. They know their plans well, and those plans might be excellent today. But is that the right plan for you in seven years when your health changes, your finances shift, and the plan itself looks different? And if your agent leaves that agency? You’re right back to calling an 800 number — just like the Carvana customer.
The Auto Broker — Independent Agents
An independent agent shops multiple carriers, gives unbiased advice, and builds a long-term relationship with you. They’re not moving inventory for one brand — they’re finding what fits your situation. And they’re still there next year, and the year after, when things change. Because things always change.
Here’s the part that surprises most people: you never pay your agent’s commission. Ever. Agent compensation is set and paid by the insurance carriers, regulated by Medicare. Doing hours of research on your own doesn’t save you money. Avoiding an agent doesn’t reduce your premium. Switching agents every year doesn’t improve your costs — it just means someone new has to learn your situation from scratch every time. Working with a local independent agent costs you nothing and gives you someone in your corner year-round — not just during open enrollment.
Which Direction Fits You?
Consider Medigap if you: travel frequently or split time between states, see multiple specialists regularly, want predictable costs regardless of how much you use the plan, can afford higher monthly premiums long term, or want to avoid network restrictions entirely.
Consider Medicare Advantage (PPO) if you: want flexibility without the higher monthly premium, don’t want referrals to see specialists, travel occasionally but not for extended periods, or understand copays and are comfortable with some cost variability.
Consider Medicare Advantage (HMO) if you: want the lowest possible copays and most extra benefits, are comfortable getting referrals from your primary care physician, stay local and don’t travel out of state frequently, or want a Part B rebate or food/OTC card on your plan.
No one answer fits everyone. Budget, health, preferences, and where you live all factor in — and the plans available in your specific county in Tampa Bay may look very different from what someone in a different part of Florida sees.
What the Numbers Actually Look Like Over Time
Choosing between Medigap and Medicare Advantage isn’t just a monthly premium decision — it’s a long-term financial picture. The real costs only reveal themselves over years of actual usage. We put together a full 10-year scenario following a fictional client named John — a 65-year-old in Trinity, FL — through healthy years, a major procedure, and eventually a serious health decline. The numbers might surprise you.
→ Coming soon: Meet John — What Medicare Really Costs Over 10 Years
Ready to Figure Out Which Direction Fits You?
Use our plan comparison tool to explore your options based on your priorities — or schedule a free consultation and let’s talk through your specific situation. No pressure. No sales pitch. Just a real conversation about what makes sense for you, your doctors, and your budget.
Frequently Asked Questions
Q: What is the difference between Medicare Advantage and Medigap? A: Medicare Advantage replaces Original Medicare with a private plan that includes networks, copays, and extra benefits. Medigap works alongside Original Medicare to cover most of what it doesn’t pay, with no networks and predictable costs. They are fundamentally different structures — not just different price points.
Q: Can I switch from Medicare Advantage to Medigap later? A: You can try — but in Florida, after your initial enrollment window, Medigap insurers can use medical underwriting. That means they can charge more or decline you based on your health history. The 12-month test drive window at age 65 is your best protection.
Q: Is Medicare Advantage a bad deal? A: Not at all — for the right person in the right situation, it’s an excellent value. The key is understanding what you’re getting, reviewing it every year, and working with an independent agent who can compare your options across carriers.
Q: Do I pay my Medicare agent’s commission? A: No. Agent compensation is set and paid by the insurance carriers, regulated by Medicare. Using an independent agent costs you nothing extra.
Q: How do I know which plans are available in my county? A: Plan availability — and quality — varies significantly by county in Florida. The best way to see what’s available for your specific situation is to use our plan comparison tool or schedule a free consultation.