Medicare Advantage vs. Medigap: A Side-by-Side Comparison

Medicare Advantage is offered by private insurance companies approved by the Centers for Medicare and Medicaid Services (CMS). When you enroll in a Medicare Advantage plan, the private insurer takes over your Medicare coverage. You still technically have Medicare Parts A and B, but the private plan provides your benefits instead of Original Medicare.

Most Medicare Advantage plans bundle Part A (hospital), Part B (medical), and Part D (prescription drugs) into a single plan. Many also include extra benefits such as routine dental care, vision exams, hearing aids, fitness memberships, and over-the-counter product allowances. These extras are not available through Original Medicare.

The trade-off is that Medicare Advantage plans operate within defined networks. HMO plans require you to use in-network providers and typically require referrals for specialists. PPO plans offer more flexibility to see out-of-network providers, but at a higher cost. For most services, you pay a copay or coinsurance at the time of care rather than a large annual deductible upfront.

Every Medicare Advantage plan must set an annual out-of-pocket maximum, which caps your cost-sharing exposure for the year. In 2026, the federal maximum allowed is $9,350 for in-network services. Once you hit that limit, the plan pays 100 percent of covered services for the rest of the year.

Medigap (Medicare Supplement insurance) works differently. You keep Original Medicare as your primary coverage, and the Medigap policy pays for some or all of the cost-sharing that Original Medicare leaves to you. This includes the Part A deductible ($1,676 per benefit period in 2026), the Part B deductible ($257 in 2026), and the 20 percent coinsurance that Part B requires for most outpatient services.

Medigap plans are standardized by the federal government and sold by private insurers. Each plan letter (Plan G, Plan N, Plan A, etc.) offers the same core benefits regardless of which insurer sells it. The difference between insurers is the monthly premium, not the coverage. Plan G from one company covers exactly the same benefits as Plan G from another company.

Because Medigap works with Original Medicare, you have access to any doctor or hospital in the United States that accepts Medicare, with no network restrictions. This is a significant advantage for people who travel frequently, split time between states, or want maximum flexibility in choosing providers.

Medigap does not include prescription drug coverage. If you choose Original Medicare plus Medigap, you must enroll in a standalone Medicare Part D drug plan separately to get prescription coverage.

The following table summarizes the key differences between Medicare Advantage and Medigap across the dimensions that matter most when choosing between them.

The cost comparison between Medicare Advantage and Medigap is more nuanced than it first appears. Medicare Advantage wins on monthly premiums, often dramatically so. In competitive markets like Hillsborough County, Florida, many Medicare Advantage plans carry a $0 monthly premium. Medigap Plan G, the most popular option for new enrollees, typically costs between $120 and $220 per month for a 65-year-old in Florida, depending on the insurer.

However, monthly premiums tell only part of the story. With Medicare Advantage, you pay copays and coinsurance each time you use services. A hospital stay, a series of specialist visits, or a course of chemotherapy can generate thousands of dollars in cost-sharing even with a $0 premium plan. The annual out-of-pocket maximum protects you from catastrophic costs, but reaching that maximum is a real possibility for people with serious health conditions.

With Medigap Plan G, you pay the Part B deductible ($257 in 2026) and then the plan covers virtually everything else. For someone who uses healthcare regularly, the higher monthly premium may be more than offset by the elimination of copays and coinsurance.

A useful way to think about it: if you are generally healthy and use minimal healthcare services in a given year, Medicare Advantage will likely cost you less. If you have chronic conditions, see specialists regularly, or anticipate significant medical expenses, Medigap's predictability often makes it the better financial choice.

For a personalized cost comparison based on your specific situation, speaking with a licensed Medicare agent is the most reliable approach.

One of the most important practical differences between Medicare Advantage and Medigap is how they handle provider access. With Original Medicare and a Medigap supplement, you can see any doctor, specialist, or hospital in the United States that accepts Medicare, without a referral and without network restrictions. This is the broadest possible access to care.

Medicare Advantage plans, particularly HMOs, require you to use providers within the plan's network. If your preferred doctor is not in-network, you either pay significantly more or find a new doctor. Networks change from year to year, so a provider who was in-network when you enrolled may not be in-network the following January.

PPO-type Medicare Advantage plans offer more flexibility, allowing you to see out-of-network providers at a higher cost. But even PPO plans have preferred networks, and out-of-network cost-sharing can be substantial.

For residents of the Brandon and Riverview area who see multiple specialists or who want the freedom to seek care at major academic medical centers, the network restrictions of Medicare Advantage are worth careful consideration. For people who primarily see a small number of local providers who are in-network, this distinction matters less.

Medicare Advantage has a clear advantage when it comes to extra benefits. Many plans in Florida include benefits that Original Medicare does not cover and that Medigap does not add:

Routine dental care: Original Medicare covers dental care only in limited circumstances related to a covered medical procedure. Many Medicare Advantage plans include routine cleanings, X-rays, and basic restorative work.

Vision coverage: Original Medicare does not cover routine eye exams or eyeglasses. Many Medicare Advantage plans include an annual vision benefit.

Hearing aids: Original Medicare does not cover hearing aids or routine hearing exams. Some Medicare Advantage plans include hearing benefits or allowances.

Over-the-counter allowances: Many plans provide a quarterly or annual allowance for over-the-counter health products such as vitamins, first aid supplies, and personal care items.

Fitness memberships: Programs like SilverSneakers are included in many Medicare Advantage plans, providing access to fitness centers at no additional cost.

These extra benefits have real dollar value and should be factored into your comparison. However, the coverage limits and benefit structures vary significantly from plan to plan. A dental benefit that covers only $500 per year may not fully meet your needs if you require significant dental work.

One of the most underappreciated aspects of this decision is what happens if you want to switch later. With Medicare Advantage, you can switch plans or return to Original Medicare during the Annual Enrollment Period (October 15 to December 7) each year. You can also make one switch during the Medicare Advantage Open Enrollment Period (January 1 to March 31).

Switching from Medicare Advantage back to Original Medicare and then adding a Medigap policy is more complicated. When you return to Original Medicare, you must purchase a Medigap policy separately. Outside of your initial Medigap open enrollment period, most states allow insurers to use medical underwriting. This means an insurer can review your health history and either deny you a Medigap policy or charge higher premiums based on pre-existing conditions.

Florida follows federal rules on this point, with limited exceptions. The practical implication is that someone who enrolls in Medicare Advantage at 65 and later develops a serious health condition may find it difficult or expensive to switch to Medigap when they want more comprehensive coverage.

This asymmetry is one reason many advisors suggest that people who are uncertain about their long-term health trajectory consider starting with Medigap while they are healthy and can qualify at standard rates, rather than trying to switch later when their health situation may make Medigap more expensive or unavailable.

Medicare Advantage tends to be the better fit for people who:

Prefer lower monthly premiums and are comfortable managing copays and cost-sharing as they arise. If you are generally healthy and do not anticipate heavy healthcare use, the premium savings can be substantial.

Value extra benefits like routine dental, vision, and hearing coverage that Original Medicare does not provide.

Have established relationships with local providers who are in the plan's network. If your primary care physician and specialists are all in-network, the network restriction matters less.

Are comfortable with a defined network and do not plan to seek care outside the plan's service area on a regular basis.

Want prescription drug coverage bundled into a single plan rather than managing a separate Part D policy.

For residents of Hillsborough County, the competitive Medicare Advantage market means there are often excellent $0 premium options with strong provider networks and meaningful extra benefits. Reviewing the top Medicare Advantage plans in Hillsborough County is a good starting point.

Medigap tends to be the better fit for people who:

Have chronic conditions or complex medical needs that result in frequent doctor visits, specialist care, or hospitalizations. The predictability of Medigap's cost structure is most valuable when healthcare use is high.

Travel frequently or split time between states. Original Medicare is accepted nationwide, and Medigap covers your cost-sharing wherever you receive care. This is a significant advantage for snowbirds and frequent travelers.

Want maximum provider flexibility without network restrictions or referral requirements. If you want to see any Medicare-accepting specialist without prior authorization, Medigap is the better choice.

Prefer predictable costs over lower monthly premiums. Knowing that your out-of-pocket exposure is minimal regardless of how much care you need provides financial security that Medicare Advantage cannot fully replicate.

Are enrolling at 65 and are currently healthy. Enrolling in Medigap during your open enrollment window guarantees acceptance at standard rates regardless of health history. This window does not last forever.

Choosing between Medicare Advantage and Medigap comes down to four key questions:

How much healthcare do you use? If you are generally healthy and use minimal services, Medicare Advantage's lower premiums likely make it the better financial choice. If you have chronic conditions or anticipate significant medical expenses, Medigap's predictability often makes it cheaper overall.

How important is provider flexibility to you? If you want to see any Medicare-accepting doctor in the country without network restrictions, Medigap is the better fit. If you are comfortable with a local network, Medicare Advantage may work well.

Do you travel or live in multiple states? If you split time between Florida and another state, or travel frequently, Original Medicare with Medigap provides more seamless coverage than most Medicare Advantage plans.

How do you weigh monthly premiums against predictability? If minimizing monthly costs is the priority and you are comfortable managing variable out-of-pocket expenses, Medicare Advantage is attractive. If you prefer knowing your maximum exposure regardless of how much care you need, Medigap provides that certainty.

Neither option is universally better. The right choice depends on your individual health situation, financial priorities, and lifestyle. A local independent Medicare agent who knows both the Medicare Advantage market and the Medigap options in your area can help you model the true cost of each path based on your specific circumstances.