Medicare Advantage vs. Medigap: Pros, Cons, and How to Choose the Right Coverage

When you enroll in Medicare, one of the biggest decisions you will make is how you want to receive your healthcare coverage.

You have two main choices. You can get your benefits through a Medicare Advantage plan, or you can keep Original Medicare and purchase a Medicare Supplement Insurance policy, also called Medigap, to help pay your share of medical costs.

Both options can provide valuable coverage, but they work in very different ways.

Medicare Advantage plans often have low monthly premiums and may include dental, vision, hearing, and prescription drug benefits. Medigap policies generally have higher monthly premiums, but they can reduce what you pay when you receive Medicare-covered care and allow you to visit a wider range of doctors.

Neither choice is best for everyone. The right option depends on your health, budget, preferred doctors, travel habits, and how much you want to pay when you need medical care.

This guide explains the pros and cons of Medicare Advantage and Medigap in simple terms. For information about Medigap, we use Choosing a Medigap Policy, an official guide developed by the Centers for Medicare & Medicaid Services (CMS) and the National Association of Insurance Commissioners (NAIC).

What Is Medicare Advantage?

Medicare Advantage, also called Medicare Part C, is a way to receive your Medicare benefits through a private insurance company approved by Medicare.

Instead of getting your Part A and Part B benefits directly through Original Medicare, you receive those benefits through your Medicare Advantage plan.

Most Medicare Advantage plans also include prescription drug coverage, known as Part D. Many offer additional benefits, such as routine dental care, vision exams, hearing services, and fitness programs.

Medicare Advantage plans must cover all medically necessary services that Original Medicare covers, except hospice care, which Original Medicare generally continues to cover. However, plans may have different rules about which doctors you can see, what you pay, and when approval is needed for certain services.

For example, a Medicare Advantage HMO plan may require you to use doctors and hospitals within its network for most nonemergency care. A PPO plan may allow you to see providers outside the network, but you could pay more.

Pros of Medicare Advantage

1. Lower monthly plan premiums

Many Medicare Advantage plans have a $0 monthly plan premium. You generally must still pay your Medicare Part B premium, along with any additional premium charged by the plan.

For someone living on a fixed income, this can make Medicare Advantage an attractive option.

2. Extra benefits

Many plans include benefits that Original Medicare does not usually cover, such as routine dental services, eyeglasses, hearing aids, and fitness memberships.

Some plans may also offer transportation, over-the-counter allowances, or other services. These benefits vary by plan and may have limits or eligibility rules.

3. Prescription drug coverage in one plan

Most Medicare Advantage plans include Part D prescription drug coverage. This means your medical and drug benefits may be managed through one insurance plan.

4. A yearly limit on medical out-of-pocket costs

Medicare Advantage plans have an annual out-of-pocket maximum for covered Part A and Part B services.

Once you reach the plan's limit for qualifying medical expenses, you generally pay nothing more for covered Part A and Part B services for the rest of the year.

The limit does not include every expense, such as premiums, Part D drug costs, or services the plan does not cover.

5. Coordinated healthcare

Some Medicare Advantage plans help organize care between your primary care doctor, specialists, hospitals, and other providers.

This may be helpful if you have several health conditions and want assistance managing appointments and treatment.

Cons of Medicare Advantage

1. Doctor and hospital networks

Most Medicare Advantage plans use provider networks. Your preferred doctor, hospital, or specialist may not participate in every plan.

If you receive nonemergency care outside your plan's network, you may pay more or may not have coverage, depending on the type of plan.

2. Prior authorization requirements

Some services, treatments, and medications require approval from your insurance company before the plan will cover them.

This process is called prior authorization. It may create delays or require your doctor to provide additional information.

3. Copayments and other medical costs

A $0 monthly premium does not mean your healthcare is free.

You may have copayments for specialist visits, diagnostic tests, outpatient surgery, hospital stays, and other services.

These costs can add up if you need frequent medical care.

4. Benefits and networks can change

Medicare Advantage plans may change their premiums, copayments, provider networks, drug lists, and extra benefits from one year to the next.

You should review your plan each fall to make sure it still meets your needs.

5. Coverage may be less convenient when traveling

Medicare Advantage plans generally cover emergency and urgently needed care throughout the United States. However, routine care outside your plan's service area may be limited.

If you spend several months each year in another state, you will need to understand how your plan covers care away from home.

What Is Medigap?

Medigap is private insurance that works alongside Original Medicare.

Original Medicare includes Part A, which helps pay for hospital services, and Part B, which helps pay for doctor visits and other outpatient medical care.

Although Original Medicare covers many services, it does not pay every dollar of your medical bills. You may still owe deductibles, copayments, and coinsurance.

Medigap helps pay some of those costs.

For example, Original Medicare generally pays 80% of the Medicare-approved amount for many Part B services after you meet the deductible. You are usually responsible for the remaining 20%.

A Medigap policy may cover that remaining amount, depending on which plan you purchase.

Medigap plans are identified by letters, such as Plan A, Plan G, and Plan N. In most states, plans with the same letter provide the same basic benefits, regardless of the insurance company selling them.

Massachusetts, Minnesota, and Wisconsin have different Medigap plan standards.

Medigap does not replace Original Medicare. It works with it. You generally cannot use Medigap to pay Medicare Advantage copayments or deductibles.

Pros of Medigap

1. Freedom to choose doctors and hospitals

One of the biggest advantages of Original Medicare with Medigap is the freedom to use any doctor or hospital in the United States that accepts Medicare.

For example, if you live in New Jersey but spend several months in Florida, you can generally receive Medicare-covered care from participating providers in either state.

Most standard Medigap policies do not have provider networks. One exception is Medicare SELECT, a type of Medigap policy that may require you to use certain hospitals or doctors to receive full supplemental benefits.

2. More predictable medical expenses

Medigap can reduce your share of the costs when you receive Medicare-covered services.

Depending on the plan you choose, you may have little to pay beyond your premiums and certain deductibles or copayments.

This can make it easier to plan your monthly and yearly healthcare budget, especially if you need frequent medical care.

3. No routine plan approval for Medicare-covered services

With Original Medicare, you generally do not need approval from a private Medicare Advantage insurance company before seeing a specialist or receiving Medicare-covered treatment.

Medicare's own coverage and medical necessity rules still apply, and some services may have specific requirements.

4. Coverage that travels with you

Original Medicare generally works throughout the United States wherever providers accept Medicare.

This can be helpful for retirees who travel often, visit family in other states, or divide their time between two homes.

Certain Medigap plans also provide limited foreign travel emergency coverage, subject to policy rules and limits.

5. Standardized benefits

In most states, Medigap plans with the same letter provide the same basic medical benefits.

For example, the basic benefits of Plan G from one insurance company are the same as Plan G from another company.

This makes it easier to compare policies based on their premiums, pricing methods, and insurance companies.

6. Coverage you can keep

Medigap policies issued since 1992 are guaranteed renewable. As long as you pay your premiums and meet the policy's terms, the insurance company generally cannot cancel your coverage because your health gets worse.

However, your premiums may increase over time.

Cons of Medigap

1. Higher monthly premiums

Unlike many Medicare Advantage plans, Medigap policies charge a separate monthly premium.

You must also continue paying your Medicare Part B premium.

If you purchase a separate Part D prescription drug plan, you may have another monthly premium.

These costs can make Medigap more expensive each month, even during years when you need very little medical care.

2. No prescription drug coverage

Medigap policies sold after 2005 do not include Medicare Part D prescription drug coverage.

If you want drug coverage, you generally need to enroll in a separate Part D plan.

3. Limited extra benefits

Medigap generally does not cover routine dental care, eye exams for glasses, hearing aids, or eyeglasses.

It also does not cover most long-term custodial care, such as ongoing help with bathing, dressing, or eating.

You may need separate coverage or savings for these expenses.

4. Premiums may increase

Your Medigap premium may rise because of inflation, claims costs, or the insurance company's pricing method.

Some policies also increase in price as you get older.

The official Choosing a Medigap Policy guide explains three common pricing methods: community-rated, issue-age-rated, and attained-age-rated.

Understanding how a company prices its policies can help you compare costs over time.

5. You may not be able to purchase Medigap later

This is one of the most important drawbacks to understand.

When you are 65 or older, your six-month Medigap Open Enrollment Period begins the first month you have Medicare Part B.

During this period, insurance companies generally cannot deny you a Medigap policy because of your health or charge you more due to health problems.

After this period ends, you may have to answer medical questions when applying for Medigap. Depending on your state and circumstances, an insurance company may charge more or deny your application.

Certain situations provide special protections, called guaranteed issue rights, and some states have additional rules.

This means choosing Medicare Advantage today could affect your ability to obtain Medigap coverage in the future.

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

Understanding Medigap Plan G and Plan N

Two Medigap plans that people often compare are Plan G and Plan N.

Both work with Original Medicare, but they cover some expenses differently.

Medigap Plan G

Plan G covers many of the major out-of-pocket costs associated with Original Medicare.

It generally covers Part A hospital coinsurance and deductible costs, Part B coinsurance, skilled nursing facility coinsurance, and Part B excess charges.

Plan G does not cover the Medicare Part B deductible. You must pay that deductible before certain benefits begin.

For someone who wants fewer medical bills when receiving care, Plan G may be an attractive option.

Medigap Plan N

Plan N also covers many major Original Medicare costs, but it has different rules for certain Part B services.

With Plan N, you may pay up to $20 for some office visits and up to $50 for emergency room visits that do not result in an inpatient admission.

Plan N also does not cover the Part B deductible or Part B excess charges.

Because it leaves you responsible for some additional expenses, Plan N may have a lower premium than Plan G, although actual prices depend on the insurance company and location.

Which Medigap Plan Is Better?

The answer depends on your budget and how often you expect to receive medical care.

If you prefer to pay a higher premium in exchange for fewer costs when you visit doctors, Plan G may be worth considering.

If you are comfortable paying certain copayments and want to compare lower-premium options, Plan N may be a good choice.

Neither plan includes routine prescription drug coverage, so you should also review your Part D options.

Comparing Costs: Two Examples

The following examples are for education only. They are not actual insurance quotes or predictions of medical expenses.

Example 1: Someone Who Rarely Visits the Doctor

Imagine a healthy 67-year-old who visits the doctor a few times each year.

They are comparing two options:

• A Medicare Advantage plan with a $0 monthly plan premium and copayments when they receive care.
• A Medigap policy costing $180 per month, plus a separate Part D plan.

The Medigap premium alone would total $2,160 per year, not including the Part B premium or drug coverage.

If this person needs little medical care, the Medicare Advantage plan might result in lower total yearly costs.

However, the comparison could change if they later need surgery, hospital care, or frequent specialist visits.

Example 2: Someone Who Needs Frequent Medical Care

Now imagine a 72-year-old who sees several specialists and receives ongoing treatment for multiple health conditions.

Under Medicare Advantage, they may pay copayments for specialist visits, tests, outpatient treatments, and hospital stays.

Under Original Medicare with a suitable Medigap policy, many of those Medicare-covered costs may be paid by Medicare and Medigap, leaving fewer bills at the time of care.

This person may value the more predictable expenses and wider provider access offered by Medigap.

However, Medigap premiums remain an ongoing expense, and the person must still consider prescription drug coverage.

The key is to compare total yearly costs, not just monthly premiums.

Can You Switch From Medicare Advantage to Medigap?

Yes, but there is an important difference between being allowed to leave Medicare Advantage and being approved for a Medigap policy.

You can generally change your Medicare Advantage coverage during Medicare's Annual Enrollment Period, October 15 through December 7.

People already enrolled in Medicare Advantage also have a Medicare Advantage Open Enrollment Period from January 1 through March 31.

During eligible periods, you may be able to return to Original Medicare.

However, returning to Original Medicare does not automatically give you the right to buy Medigap.

Outside your Medigap Open Enrollment Period, you may need to pass medical underwriting unless you qualify for a guaranteed issue right or another state protection.

What Is a Medigap Trial Right?

Federal rules provide certain trial rights that can make it easier to try Medicare Advantage and later return to Original Medicare with Medigap.

For example, if you join Medicare Advantage when you first become eligible for Medicare at age 65 and decide within your first year that you want to return to Original Medicare, you may qualify for a trial right to purchase Medigap.

A separate trial right may apply if you drop an existing Medigap policy to join Medicare Advantage for the first time and decide to return within one year.

These rights have specific rules and deadlines. They are not a general promise that everyone can switch back to Medigap whenever they choose.

Before leaving your current coverage, confirm whether you qualify for Medigap and when your new coverage can begin.

Which Option Is Better for Someone Turning 65?

Your first Medicare decision deserves careful attention because it may affect your future coverage choices.

If you are turning 65, think about the following questions.

Do You Want to Keep Your Current Doctors?

Check whether your doctors accept Original Medicare and whether they participate in the Medicare Advantage plans you are considering.

If you want access to a wide range of Medicare providers, Original Medicare with Medigap may offer more flexibility.

How Much Can You Afford Each Month?

Medicare Advantage may appeal to people who want to keep monthly premiums low.

Medigap may appeal to people who can afford higher monthly premiums and prefer fewer medical bills when they receive covered care.

Do You Travel Often?

If you frequently travel within the United States or spend part of the year in another state, Original Medicare with Medigap may be more convenient.

If you spend most of your time near home and your doctors participate in a Medicare Advantage network, a local plan may work well.

Do You Have Ongoing Health Conditions?

Think about how often you see specialists, receive tests, or need treatment.

Compare what those services would cost under each option, including any network or approval rules.

How Important Are Extra Benefits?

If you value dental, vision, hearing, or other added benefits, Medicare Advantage may offer services that are not included in Medigap.

Be sure to review benefit limits, participating providers, and any costs you may still owe.

Could You Change Your Mind Later?

This question is especially important.

It may be easier to move from Original Medicare with Medigap into Medicare Advantage during an eligible enrollment period than to return to Medigap later.

Your future ability to buy Medigap may depend on your health, state, and whether you qualify for special enrollment protections.

Common Questions About Medicare Advantage and Medigap

Is Medicare Advantage better than Medigap?

Neither is better for everyone. Medicare Advantage often has lower monthly premiums and extra benefits. Medigap often provides broader access to Medicare providers and helps reduce medical costs when you receive covered care.

Can I have Medicare Advantage and Medigap at the same time?

No. Medigap is designed to work with Original Medicare, not Medicare Advantage. You cannot use a Medigap policy to pay Medicare Advantage copayments or deductibles.

Does Medigap cover prescriptions?

Medigap policies sold after 2005 do not include Medicare Part D prescription drug coverage. You generally need a separate Part D plan if you want prescription coverage with Original Medicare.

Can I see any doctor with Medigap?

With standard Medigap and Original Medicare, you can generally see any doctor in the United States who accepts Medicare. Medicare SELECT policies may have additional network requirements for full supplemental benefits.

Can a Medigap company deny me coverage?

During your six-month Medigap Open Enrollment Period, companies generally cannot deny you coverage because of your health. Outside that period, medical underwriting may apply unless you have a guaranteed issue right or other state protections.

Does Medicare Advantage cover everything?

No. Medicare Advantage covers required Medicare services, but you may still have copayments, deductibles, network restrictions, and approval requirements. Extra benefits also have their own coverage limits.

Can I change my Medicare coverage every year?

You generally have opportunities to change Medicare Advantage and Part D coverage each year. However, those enrollment periods do not guarantee that you can buy a Medigap policy without medical underwriting.

How to Make the Right Medicare Decision

Choosing between Medicare Advantage and Medigap is about more than comparing premiums.

It is about understanding how you want to receive healthcare, which doctors you want to see, what you can afford, and how much flexibility you want in the years ahead.

Medicare Advantage may be a good fit if you want lower monthly plan premiums, value extra benefits, and are comfortable using a plan's provider network.

Original Medicare with Medigap may be a better fit if you want broad access to Medicare providers, travel often, and prefer more predictable costs for covered medical services.

Before enrolling, compare your doctors, prescriptions, expected healthcare needs, premiums, and potential out-of-pocket costs. Also consider how easy or difficult it may be to change coverage later.

At Beacon Senior Health Advisors, we help people understand their Medicare choices and compare coverage based on their individual needs. If you are approaching Medicare eligibility or considering a change, visit Beacon Senior Health Advisors to learn more about your options.

The goal is not simply to find a plan with the lowest premium. It is to choose coverage that fits your healthcare needs and gives you confidence in the years ahead.

Sources and References

Primary Medigap resource: Centers for Medicare & Medicaid Services and National Association of Insurance Commissioners, Choosing a Medigap Policy. The official guide explains standardized Medigap benefits, costs, enrollment rights, medical underwriting, and switching protections.

Additional Medicare resources:

• Medicare.gov: Medicare Advantage Plans
• Medicare.gov: Medigap
• Medicare.gov: Find Health and Drug Plans
• State Health Insurance Assistance Programs

This article is intended for general education. Benefits, premiums, provider networks, enrollment rules, and plan availability may vary by location and year. Review current plan documents and your state's Medigap protections before making a coverage decision.

Beacon Senior Health Advisors is not affiliated with or endorsed by the U.S. government or the federal Medicare program.