Let’s Talk About the Biggest Medicare Decision You’ll Make: Medigap or Medicare Advantage?
Imagine you’re driving down a familiar road when you come to a fork. One route promises flexibility and predictable costs. The other offers convenience, extra benefits, and lower monthly premiums. Both roads eventually get you where you’re going, but they take very different journeys.
That’s exactly what happens when you enroll in Medicare. After signing up for Original Medicare, every beneficiary reaches an important crossroads: Should you add a Medicare Supplement, or choose a Medicare Advantage plan instead?
It’s a conversation I have almost every day with people throughout Citrus, Hernando, Pasco, and Polk Counties. Whether someone lives in Crystal River, Homosassa, Inverness, Brooksville, Spring Hill, New Port Richey, Lakeland, or Winter Haven, the questions are remarkably similar. The answers, however, depend on each person’s health, doctors, prescriptions, travel plans, and budget.
Why Original Medicare Isn’t Enough
Before we get to the fork in the road, let’s answer a question I hear all the time: “Why can’t I just keep Original Medicare?” The truth is, you can. Original Medicare provides excellent coverage, but it doesn’t pay all of your healthcare costs. You’ll generally pay the Part A hospital deductible (estimated at $1,716 per benefit period in 2026), the annual Part B deductible ($283), and typically 20% of the Medicare-approved amount for Part B (medical) services. Unlike employer, retiree, or Marketplace health insurance, Original Medicare has no annual out-of-pocket maximum, so there is no limit on what you could spend if you need extensive medical care. It also doesn’t include prescription drug coverage (Part D) and generally doesn’t cover routine dental, vision, or hearing care. Because of these gaps, most people choose additional coverage to protect themselves from potentially significant medical expenses.
Navigating Medicare can feel like walking into the middle of a movie—you know something important is happening, but you’re not sure how you got there. Choosing between a Medicare Supplement and a Medicare Advantage plan may seem like just another health insurance decision. In reality, it’s one of the most important Medicare choices you’ll ever make. That’s because your first choice can affect what options you’ll have later if your health changes and you become chronically or seriously ill. Many people don’t learn about medical underwriting until it’s too late. I’ll discuss this in detail later in the article.
After you enroll in Original Medicare, you’ll reach what I call the Medicare Fork in the road. From there, you have two paths to choose from: Original Medicare with a Medicare Supplement or a Medicare Advantage plan. At first glance, they may seem like two ways to get your Medicare benefits. In reality, they work very differently, and each has advantages and trade-offs. Understanding those differences now can help you avoid surprises later and choose the coverage that best fits your health, your budget, and the way you want to receive your care.
Understanding the Fundamental Choice: Medicare Supplements vs. Medicare Advantage Plans
The Medicare Fork in the Road: Beneficiaries may choose between supplementing Original Medicare or replacing it with an all-in-one Medicare Advantage plan.
The “Fork in the Road”: Original Medicare vs. Medicare Part C
Once you’re enrolled in Original Medicare, you have your basic Medicare coverage—Part A for hospital services and Part B for medical care like doctor visits, lab work, and preventive care. An advantage of Original Medicare is the freedom to see any doctor or hospital anywhere in the country that accepts Medicare. One path is to keep Original Medicare and add a Medicare Supplement and Prescription Drug Coverage. The other is to enroll in a Medicare Advantage (Part C) all-in-one plan offered by a private insurance company.
Why You Can’t Have Both
This is another question I hear often. The answer is no. You can’t have both a Medicare Supplement and a Medicare Advantage plan at the same time. There are two completely different ways of receiving your Medicare benefits. Even if it were allowed, it wouldn’t make financial sense because you’d be paying for coverage that overlaps. A Medicare Supplement is designed to work with Original Medicare, helping pay many of the costs where Original Medicare leaves off. A Medicare Advantage plan, on the other hand, is offered by a private insurance company and is an all-in-one policy that includes some of the 6 extras, such as dental and vision.
How Insurance Companies Administer the All-in-One Option
Private insurance companies offer Medicare Advantage plans that are approved by the federal government. These companies receive a monthly per-member subsidy from the government to manage your care. Because these plans are private, they vary significantly in their structure and costs. While they must provide at least the same level of coverage as Original Medicare, they do so through networks and specific cost-sharing arrangements that differ by region and provider.
Understanding Network Restrictions: HMOs vs. PPOs
One of the biggest differences with Medicare Advantage is that you’ll usually receive your care through a network of doctors and hospitals. With an HMO, you’ll need to use providers in the plan’s network. HMOs require a referral from your primary care physician before you can see a specialist. PPO plans offer more flexibility and usually allow you to see providers outside the network, but you’ll typically pay more for doing so. Healthcare looks different depending on where you live. A Medicare Advantage plan that works well for someone in Lakeland may not be the best fit for someone in Homosassa or Brooksville because provider networks are built around local doctors and hospitals. That’s one reason I compare plans based on where my clients actually receive care—not just the monthly premium. Before enrolling in any Medicare Advantage plan, it’s important to make sure your doctors and hospitals are Part of the plan’s network.
Another important difference is prior authorization. With many Medicare Advantage plans, your doctor may need approval from the insurance company before certain procedures, surgeries, MRIs, CT scans, or hospital stays are covered. The plan reviews the request to determine whether it meets its medical necessity guidelines. While this process is designed to help manage healthcare costs, it can sometimes delay care while approval is pending.
The Appeal of Extra Benefits: Dental, Vision, and Hearing Coverage
Many of my clients choose Medicare Advantage plans because of the extra benefits not covered by Medigap. Depending on the plan, you may receive coverage for routine dental care, vision exams and eyewear, hearing aids, fitness programs, transportation, over-the-counter allowances, and other wellness benefits. For many people, having these benefits bundled into one plan is both convenient and affordable. Just remember, every plan is different, so it’s important to look beyond the extras and compare the provider network, costs, and coverage to make sure the plan truly fits your healthcare needs.
Prescription Drug Coverage (Part D) Integration
Most Medicare Advantage plans include prescription drug coverage (Part D). That means you don’t have to shop for and manage a separate prescription drug plan. However, it’s important to remember that every plan has its own list of medications, and that list can change from year to year. Plans also have preferred pharmacy networks, so using the right pharmacy can help you save money. That’s one of the reasons I recommend reviewing your Medicare coverage every year—to make sure your medications are still covered and your pharmacy is still in-network.
When Medicare Advantage Makes Sense
Meet Tom. Tom is 67, retired, and enjoys golfing a few times a week. Other than taking medication for high cholesterol and high blood pressure, he’s in good health and sees his primary care doctor once or twice a year. He likes having all of his coverage—including prescription drugs—in one plan, and the lower monthly premium fits comfortably within his retirement budget. The dental, vision, hearing, and fitness benefits are features he’ll actually use.
Tom chose a Medicare Advantage PPO because his primary care doctor, cardiologist, preferred hospital, and pharmacy all participate in the plan’s network. He doesn’t mind using network providers and appreciates having an annual maximum out-of-pocket limit to help protect him if an unexpected illness or injury occurs. As long as he reviews his coverage each year to make sure his doctors, medications, and network continue to meet his needs, Medicare Advantage is a good fit for his lifestyle. Tom’s situation is common among my clients in Citrus, Hernando, and Polk counties.
How Medigap Works Alongside Medicare Parts A and B
Medigap plans are designed to do exactly what the name implies: pay for the gaps in your Original Medicare coverage. When you incur a medical bill, Medicare pays its share first, and your Medigap policy pays its portion of the remaining coinsurance and deductibles. Because it functions as a supplement rather than a replacement, it preserves your ability to see any doctor or specialist in the country, provided they accept Medicare.
Standardized Benefits: Comparing Medigap Plans
One of the things many people like about Medicare Supplements is their simplicity. The benefits are standardized by the federal government. That means a Plan G from one insurance company provides the same basic medical benefits as a Plan G from another company in the same state. The same is true for Plan N and High Deductible Plan G. Since the coverage is standardized, you’re usually comparing things like monthly premium, rate stability, customer service, and the company’s financial strength—not different levels of medical coverage. Today, Plan G, Plan N, and High Deductible Plan G are among the most popular. Each offers a different balance of monthly premium and out-of-pocket costs, allowing you to select the plan that best fits your health and financial needs.
Prior authorization for standard procedures is generally reduced under Original Medicare and Medigap policies. For individuals with serious health conditions, this simplicity is a vital benefit. You focus on your recovery rather than the administrative logistics of whether a specific hospital or surgeon is “in-network.”
Medicare Supplement plans offer the most flexibility to see any certified Medicare provider nationwide and are the gold standard for frequent travelers. Medicare Advantage plans do not offer this same flexibility, especially for patients with complex, long-term conditions.
Managing a Separate Medicare Part D Prescription Drug Policy
Because Medigap does not provide prescription coverage, you must purchase a standalone Part D plan to cover your medications. This necessitates managing two separate premiums and sometimes two different insurance carriers. While it adds a layer of administrative complexity, it also provides the benefit of “siloing” your coverage—if your drug needs change or your plan’s formulary shifts, you can change your Part D plan during the annual election period without jeopardizing your core health insurance.
A Good Fit for a Medicare Supplement
Meet Susan. Susan is 66 and recently retired after spending 35 years as a school administrator. She and her husband travel across the country in their RV, spending several weeks each year visiting their grandchildren in different states. She has high blood pressure that’s well controlled today, but her mother had breast cancer, and her father developed Parkinson’s disease. Susan hopes she’ll stay healthy for many years, but she knows none of us has a crystal ball.
After learning about her options, Susan chose Original Medicare with a Medicare Supplement Plan G. She liked knowing she could see any Medicare doctor in the country without worrying about networks or referrals. She also appreciated predictable healthcare costs and the peace of mind that if her health ever changed, she wouldn’t have to wonder whether she’d still qualify for a Medicare Supplement plan.
Susan pays a higher monthly premium than she would with many Medicare Advantage plans. Still, for her, the freedom to travel, the flexibility to choose her providers, and the predictability of her medical expenses made that extra cost well worth it.
The Trade-Offs
The choice at the fork in the road is between how you prefer to pay for your healthcare. Medicare Advantage plans often have low or zero-dollar monthly premiums, but they involve high, variable out-of-pocket costs as you use services. Medigap requires a higher monthly premium but offers extreme predictability.
If you travel frequently within the U.S., Medigap is superior. Because you can see any doctor who accepts Medicare, your coverage travels with you. Medicare Advantage plans, however, are usually tied to a specific service area. If you go to a different state, you may get stuck paying out-of-network rates or, in some cases, have no coverage at all unless it is a life-threatening emergency.
If you enjoy traveling outside the United States, this is another important difference to consider. Most Medicare Supplement plans, including Plan G, Plan N, and High Deductible Plan G, include a limited emergency foreign travel benefit. While it isn’t designed to replace travel insurance, it can provide valuable protection if you experience a medical emergency while traveling abroad. Most Medicare Advantage plans do not offer this benefit, so if international travel or cruises are Part of your retirement plans, be sure to factor that into your decision.
The Difference Many People Don’t Learn Until It’s Too Late: The Underwriting Trap
Cost isn’t the only difference between Medicare Supplement and Medicare Advantage. There’s another important consideration that many people don’t learn about until years later—medical underwriting.
If you enroll in a Medicare Supplement when you’re first eligible for Medicare, you generally have a one-time Medicare Supplement Open Enrollment Period. During this window, insurance companies cannot deny you coverage or charge you more because of a health condition.
However, if you choose a Medicare Advantage plan instead and later decide you’d rather have a Medicare Supplement, the rules are different. In Florida, you’ll usually have to answer health questions and go through medical underwriting unless you qualify for a specific guaranteed issue right. Depending on your health, the insurance company may approve your application or decline it altogether.
On the other hand, Medicare Advantage plans do not use medical underwriting at any age or stage of an illness. As long as you’re eligible for Medicare and enrolling during a valid enrollment period, you generally cannot be turned down because of a pre-existing health condition.
This doesn’t mean Medicare Advantage is the wrong choice. For many people, it’s an excellent fit. But it does mean your first Medicare decision can affect the options available to you later. That’s why I encourage my clients to think beyond this year’s premium and consider where they may want their healthcare to be five, ten, or even twenty years from now.
The Bottom Line
There isn’t one Medicare plan that’s right for everyone. The best choice depends on your health, your budget, your doctors, your travel plans, and what’s most important to you.
For some people, the freedom to see any provider nationwide who accepts Medicare and the predictability of a Medicare Supplement are well worth the higher monthly premium. Others prefer the lower monthly cost and extra benefits that many Medicare Advantage plans provide and are comfortable receiving care within a provider network.
The key is making an informed decision from the very beginning. Understanding how Medicare Supplement underwriting works in Florida, knowing the differences in provider access, and comparing the long-term costs—not just the monthly premium—can help you avoid surprises down the road.
If you’re turning 65 or already on Medicare and aren’t sure which path is right for you, I’d be happy to help. Together, we’ll compare your options and find the right coverage that fits your life.
If you live in Citrus or Polk County, Florida, call Bayside Health Benefits at 352-999-2727 to schedule your complimentary Medicare consultation. As a Certified Medicare Insurance Planner™ (CMIP®), my goal is simple: to help you understand your options and give you the confidence to make the Medicare decision that’s right for you.
Coming Next in Our Medicare Education Series: Choosing a Medicare plan is only part of the journey. Next, we’ll explore why working with a Certified Medicare Insurance Planner™ can make all the difference—from understanding Medicare and Medicaid programs to receiving year-round guidance, advocacy, and personalized support long after enrollment. After all, the right advisor can be just as important as the right plan.
About Dayna Schafer
Dayna Schafer is a Certified Medicare Insurance Planner™ and founding member of Bayside Health Benefits in Homosassa, FL. With over 25 years of experience, Dayna has guided thousands of Medicare beneficiaries across Florida in choosing coverage with clarity and confidence. A member of the RISE Community and contracted with 11 insurers, she is known for her integrity, personal guidance, and dedication to finding the right fit for each client’s healthcare needs. Learn more at www.baysidemedicare.com.
Frequently Asked Questions
What is the downside of Medigap?
The main downside of a Medigap plan is the higher monthly premium compared to many Medicare Advantage plans. Because Medigap doesn’t include prescription drug coverage, you’ll also need to purchase and manage a separate Part D plan, which adds a second premium and a second insurance carrier to keep track of. For people in good health who rarely use medical services, the monthly cost of a Medigap plan may feel high relative to what they’re actually using. That said, for people who want predictable costs and the freedom to see any Medicare-accepting provider in the country, many find the premium well worth it.
Why are people leaving Medicare Advantage plans?
One of the most common reasons people want to leave Medicare Advantage plans is the experience of network restrictions, prior authorization requirements, and variable out-of-pocket costs when they actually need care. Some people also find that their doctors, hospitals, or preferred pharmacies leave the plan’s network, which forces them to find new providers or pay higher out-of-network costs. The challenge is that switching from Medicare Advantage to a Medigap plan in Florida typically requires going through medical underwriting, and depending on your health at that point, you may be declined. That’s why understanding the long-term implications of your first Medicare decision matters so much.
How much does Medigap cost per month?
Medigap premiums vary depending on the plan you choose, the insurance company, your age, and where you live. The article does not quote specific monthly premium amounts because they differ by individual circumstances. What the article does explain is that Medigap plans like Plan G, Plan N, and High Deductible Plan G each offer a different balance of monthly premium and out-of-pocket costs, so there’s a range of options depending on your budget. A one-on-one Medicare planning review with a Certified Medicare Insurance Planner is the best way to get accurate premium quotes based on your specific situation.
What is the biggest disadvantage of the Medicare Advantage plan?
The biggest disadvantage of Medicare Advantage for many people is the combination of network restrictions and prior authorization requirements. With most Medicare Advantage plans, you’re limited to a network of doctors and hospitals, and your doctor may need to get approval from the insurance company before certain procedures, surgeries, or imaging studies are covered. This can delay care while approval is pending. For people with complex or serious health conditions, or for those who travel frequently within the U.S., these restrictions can create real problems that a Medigap plan would avoid.
Is it better to have a Medigap plan or a Medicare Advantage plan?
Neither plan is universally better. The right choice depends on your health, your budget, your doctors, your travel habits, and how you want to receive your care. Medigap offers predictable costs, nationwide provider access, and no prior authorization for standard procedures, but it comes with a higher monthly premium and no built-in prescription drug or dental coverage. Medicare Advantage often has lower or zero-dollar monthly premiums and includes extra benefits like dental, vision, and hearing, but it ties you to a provider network and may require prior authorization for certain services. The most important thing is to understand both options fully before you choose, because your first Medicare decision can affect what options are available to you later if your health changes.
What are the disadvantages of a Medigap plan?
Medigap plans have three main disadvantages. First, the monthly premium is higher than most Medicare Advantage plans. Second, Medigap does not include prescription drug coverage, so you’ll need a separate Part D plan. Third, Medigap plans do not include the extra benefits that many Medicare Advantage plans offer, such as routine dental, vision, hearing, fitness programs, or over-the-counter allowances. For people who want those extras bundled into one plan at a lower monthly cost, Medicare Advantage may feel like a better value, at least in the short term.
Why do people say not to get a Medicare Advantage plan?
The concern most often raised about Medicare Advantage plans centers on what happens when you actually get sick. Network restrictions, prior authorization requirements, and variable out-of-pocket costs can create barriers to care that aren’t obvious when you’re healthy and reviewing a plan’s monthly premium and extra benefits. There’s also the underwriting issue: if you start on Medicare Advantage and later want to switch to a Medigap plan in Florida, you’ll generally have to go through medical underwriting, and you may be declined if your health has changed. That doesn’t mean Medicare Advantage is the wrong choice for everyone, but it does mean the decision deserves careful thought beyond this year’s premium.