What Medicare Advantage is and how it differs from Original Medicare

Medicare Advantage is an alternative way to receive your Medicare benefits through a private insurance company instead of the federal government. You still get Part A (hospital) and Part B (doctor) coverage, but the insurance company manages your care and sets the rules about which doctors you can see and which hospitals you can use.

The main difference from Original Medicare is that Medicare Advantage plans almost always include prescription drug coverage (Part D) built in, whereas Original Medicare does not. But you also give up some flexibility: Original Medicare lets you see any doctor who accepts Medicare, while most Medicare Advantage plans require you to use doctors and hospitals within their network. If you go outside the network, you typically pay more or the plan may not cover it at all.

Medicare Advantage plans are run by companies like UnitedHealthcare, Humana, Anthem, and Aetna. These companies receive a fixed payment from Medicare for each person enrolled, so they have financial incentive to manage costs. That can mean lower out-of-pocket costs for you in some situations, but it can also mean more restrictions on which treatments the plan will cover.

Key Takeaways

  • Medicare Advantage is sold by private insurance companies and includes prescription drug coverage, but limits you to in-network doctors and hospitals in most cases.
  • Your monthly premium, deductible, and copays vary by plan and by which insurance company offers it in your area—there is no single Medicare Advantage plan.
  • You must enroll during the Annual Enrollment Period (October 15 to December 7 each year) unless you are newly may be able to access for Medicare or have a may have access to life event.
  • If you switch to Medicare Advantage, you can switch back to Original Medicare during the Annual Enrollment Period, but you cannot buy a Medigap supplemental plan afterward without medical underwriting.
  • The plan you choose depends on which doctors and hospitals you want to use, what prescriptions you take, and how much you can afford to pay out of pocket.

Types of Medicare Advantage plans and how they restrict your choices

Medicare Advantage comes in several flavors, and the type determines how much freedom you have to pick your doctor. A Health Maintenance Organization (HMO) plan requires you to choose a primary care doctor and get referrals from that doctor to see specialists. You can only use doctors and hospitals in the plan's network, except in emergencies. HMO plans usually have the lowest premiums and copays.

A Preferred Provider Organization (PPO) plan lets you see any doctor without a referral, but you pay less if you use doctors and hospitals in the network. You can go out of network, but your copay or coinsurance will be higher. PPO plans typically cost more in monthly premiums than HMO plans.

A Private Fee-for-Service (PFFS) plan works differently: the insurance company, not Medicare, sets the payment rates for doctors and hospitals. Doctors are not required to be in the plan's network, but they can choose whether to accept the plan's payment rate. If they do not, you may have to pay the difference. PFFS plans are less common and available in fewer areas.

A Special Needs Plan (SNP) is designed for people with specific conditions (like diabetes or heart disease), people who live in certain institutions, or people who are may be able to access for both Medicare and Medicaid. SNPs often have lower copays for related care but require you to use network providers.

What you pay: premiums, deductibles, and copays

Medicare Advantage plans have no single price. What you pay depends on which insurance company offers the plan, which plan you choose, and where you live. Some plans have a $0 monthly premium, meaning you pay nothing beyond your Medicare Part B premium (which you pay regardless of which plan you choose). Other plans charge $50, $100, or more per month.

Most plans have a deductible—the amount you must pay out of pocket before the plan starts to pay. This deductible applies to doctor visits, hospital stays, or both, depending on the plan. Some plans have no deductible. After you meet the deductible, you typically pay a copay (a fixed amount like $20 for a doctor visit) or coinsurance (a percentage of the cost).

Plans also set an out-of-pocket maximum—the most you will pay in a year for in-network care. Once you reach that limit, the plan pays 100 percent of your in-network costs for the rest of the year. This maximum varies by plan but is capped by Medicare at a certain amount each year (the cap changes annually).

Prescription drug coverage is included, but the plan decides which drugs it covers and at what cost. You may pay a copay per prescription, or the cost may depend on which tier the drug is on—generic drugs usually cost less than brand-name drugs. Some plans have a coverage gap where you pay more for drugs in a certain price range.

How to find and compare plans in your area

You cannot buy a Medicare Advantage plan from an insurance company directly and have Medicare pay for it. You must enroll through Medicare's official plan finder at Medicare.gov, or by calling 1-800-MEDICARE. The plan finder lets you enter your zip code, the doctors and hospitals you want to use, and the prescriptions you take. It then shows you which plans are available in your area and how much each one would cost you based on your specific situation.

When you compare plans, look at three things: whether your doctors and hospitals are in the network, what your out-of-pocket costs would be for the care you actually use, and whether your prescriptions are covered and at what cost. A plan with a low premium might have high copays, so the total cost to you depends on how much care you actually need.

You can also work with a licensed insurance agent who specializes in Medicare. These agents are free to use—the insurance company pays them a commission. They can help you understand the differences between plans, but remember that some agents work for one company and may not show you all available options.

When you can enroll and what happens if you miss the important date

The main enrollment window is the Annual Enrollment Period, which runs from October 15 to December 7 each year. Any plan you choose during this period takes effect on January 1. You can make this choice once per year.

If you are newly may be able to access for Medicare (you just turned 65 or became may be able to access due to disability), you have a seven-month Initial Enrollment Period centered on your may be able to access month. During this window, you can enroll in a Medicare Advantage plan without penalty.

If you miss the Annual Enrollment Period and do not have a may have access to life event (such as losing employer coverage, moving to a new state, or a death in your family), you cannot enroll in a Medicare Advantage plan until the next Annual Enrollment Period. If you try to enroll late without a may have access to event, Medicare will reject your enrollment. Some states have different rules, so check with your state's health insurance counselor if you think you have a may have access to event.

Switching between Medicare Advantage and Original Medicare

If you enroll in a Medicare Advantage plan and later decide you want to switch back to Original Medicare, you can do so during the Annual Enrollment Period. The switch takes effect on January 1 of the following year. You can also switch to a different Medicare Advantage plan during this period.

There is one important catch: if you switch from Medicare Advantage back to Original Medicare, you cannot buy a Medigap supplemental insurance plan unless you enroll during a Medigap open enrollment period (usually when you first become may be able to access for Medicare or when you lose employer coverage). If you miss that window, insurance companies can deny you coverage or charge you more based on your health history. This is called medical underwriting, and it can make Medigap very expensive or unavailable.

Some people switch back and forth between Medicare Advantage and Original Medicare multiple times, but each switch carries this risk. If you think you might want Medigap coverage later, talk to an insurance counselor before you leave Original Medicare for Medicare Advantage.

What Medicare Advantage does not cover

Medicare Advantage covers the same services that Original Medicare covers: hospital stays, doctor visits, lab tests, imaging, and most preventive care. But there are limits. Dental, vision, and hearing care are not covered by Original Medicare or Medicare Advantage, though some Medicare Advantage plans offer limited dental or vision benefits as an extra perk.

Long-term care (nursing home or assisted living) is not covered by any Medicare plan. Neither is custodial care—help with bathing, dressing, or other daily activities when you do not need skilled nursing. Some Medicare Advantage plans offer supplemental benefits like transportation, meal delivery, or fitness programs, but these vary widely and are not may provide.

If you need a treatment or drug that your plan does not cover, you can ask the plan for an exception. The plan can say yes or no. If the plan denies your request, you have the right to appeal, but the process takes time and there is no may provide the plan will change its decision.

Frequently Asked Questions

Can I use my Medicare Advantage plan if I travel or move?

Most Medicare Advantage plans are regional—they only cover care within a specific geographic area. If you travel outside that area, you may not have coverage except in emergencies. If you move to a different state or county, your plan may no longer be available, and you will need to choose a new plan. You can change plans if you move, even outside the Annual Enrollment Period.

What happens to my Medicare Advantage plan if the insurance company stops offering it?

Insurance companies can discontinue plans, though they must give you notice. If your plan is discontinued, Medicare will send you information about other plans available in your area. You will have a window to choose a new plan without penalty. If you do not choose a new plan, Medicare will automatically enroll you in another plan in your area, though you can change it during the next Annual Enrollment Period.

Do I still pay my Medicare Part B premium if I have Medicare Advantage?

Yes. You pay your Part B premium to Medicare regardless of which plan you choose. Some Medicare Advantage plans have an additional monthly premium on top of that. Your Part B premium is deducted from your Social Security check automatically, unless you arrange to pay it another way.

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

No. If you have Medicare Advantage, you cannot buy a Medigap plan. Medigap is designed to work with Original Medicare, not Medicare Advantage. If you have both, Medicare will not pay claims correctly, and you may lose coverage.

What if my doctor leaves the Medicare Advantage plan's network?

If your doctor stops accepting the plan, you will need to find a new doctor in the network or switch to a different plan during the Annual Enrollment Period. Some plans allow you to continue seeing an out-of-network doctor for a limited time if the doctor was in the network when you enrolled, but this varies by plan and is not may provide.