Medicare Advantage vs Original Medicare and How to Compare Them
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Quick answer: With Original Medicare, you can see any doctor or hospital that takes Medicare, and you pay your share as you get care. With Medicare Advantage, you join a private plan that includes Part A and Part B, usually drug coverage and often extras, but you may have to use the plan's network.
Most pages on this topic stop at the side-by-side chart. Below you get what Medicare.gov says, the dates when you can switch and the questions to ask before you join.
Medical note: This is general education, not insurance or medical advice. Plans and prices differ by area, so check your own options at Medicare.gov or with your State Health Insurance Assistance Program (SHIP).
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What is the main difference?
Medicare.gov says there are 2 main ways to get your Medicare coverage: Original Medicare and Medicare Advantage.
Original Medicare includes Part A (hospital insurance) and Part B (medical insurance). You can add Part D drug coverage and supplemental coverage.
Medicare Advantage is also called Part C. It is a Medicare-approved plan from a private company. It includes Part A and Part B, and most plans include Part D.
How do doctors and referrals differ?
With Original Medicare, you can use any doctor or hospital that takes Medicare, anywhere in the U.S. In most cases you don't need a referral to see a specialist.
With Medicare Advantage, you may need to use doctors and providers in the plan's network and service area for non-emergency care. You may need a referral to see a specialist.
Some plans cover non-emergency care out of network, but Medicare.gov says it may cost more.
How do costs differ?
Medicare.gov describes the cost side like this:
- Original Medicare: for Part B services you usually pay 20% of the Medicare-approved amount after you meet your deductible. You pay a monthly Part B premium, plus a separate Part D premium if you join a drug plan.
- Medicare Advantage: out-of-pocket costs vary by plan. You pay the Part B premium and may also pay the plan's premium. Some plans may have a $0 premium.
The yearly limit matters too. Original Medicare has no yearly limit on what you pay out of pocket, unless you have supplemental coverage or other insurance. Medicare Advantage plans have a yearly limit on covered services.
I left out dollar amounts on purpose. They change every year and differ by plan, so check the numbers for your area on Medicare.gov.
If drug costs are your biggest worry, see our guide to prescription discount programs.
What does each one cover?
Original Medicare covers most medically necessary services and supplies in hospitals, doctors' offices and other facilities. It doesn't cover some services, like routine physical exams, eye exams and most dental care.
Medicare Advantage plans must cover all medically necessary services that Original Medicare covers. Plans may also offer extra benefits, like some vision, hearing and dental services.
There is a trade-off. With Original Medicare you usually don't need approval, called prior authorization, for covered services. With a Medicare Advantage plan you may need approval before it covers certain services or supplies.
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Can you add a Medigap policy?
It depends on which side you pick. Medicare.gov says you can buy Medigap to help pay costs in Original Medicare, like your 20% coinsurance. You can't buy Medigap to cover your out-of-pocket costs in a Medicare Advantage plan.
Timing matters here. If you don't buy a Medigap policy within 6 months of when you first get Part A and Part B, you may not be able to buy one, or you may pay more.
Medigap policies are standardized and, in most states, named by letters. Medicare.gov says price is the only difference between policies with the same letter.
When can you switch?
You can only join, switch or drop a Medicare Advantage plan at certain times, called enrollment periods. Medicare.gov lists these:
- Open Enrollment, October 15 to December 7: join, drop or switch plans, or switch between Original Medicare and Medicare Advantage. Coverage starts January 1, and the plan must get your request by December 7.
- Medicare Advantage Open Enrollment, January 1 to March 31: only if you're already in a Medicare Advantage plan. You can switch plans or go back to Original Medicare.
- Special Enrollment: only for certain life events, like moving or losing or changing your coverage.
If you joined a Medicare Advantage plan when you first signed up, you can change plans or go back to Original Medicare within the first 3 months you have Part A and Part B.
What should you check before you join?
Medicare.gov says to make sure the plan meets your needs. In plain terms, ask these four things:
- Doctors: ask your doctors and pharmacies if they're in the plan's network.
- Drugs: check that the plan covers your prescriptions. Add every drug you take to the plan comparison tool on Medicare.gov for a cost estimate.
- Costs: review premiums, deductibles and your estimated yearly drug costs.
- Rules: ask which services need approval first.
Also check other coverage. If you have an employer or union plan, talk to your benefits administrator before you change anything.
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Staying active is part of healthy aging too. Our guide to osteoporosis prevention exercises is a good next read.
Frequently asked questions
Is Medicare Advantage the same as Original Medicare?
No. Both include Part A and Part B, but Medicare Advantage is a plan from a private company. It can have a network, its own costs and extra benefits.
Which one is better?
Medicare.gov doesn't pick one. It lists things to weigh: doctor and hospital choice, cost, coverage and travel. The right choice depends on your doctors, drugs and budget.
Do I need Part A and Part B to join Medicare Advantage?
Yes. Medicare.gov says you must have both Part A and Part B to join a Medicare Advantage plan.
Does Medicare cover care outside the U.S.?
Original Medicare generally doesn't. Medicare Advantage plans generally don't either, though some offer an extra benefit for emergency and urgently needed services when you travel.
Where can I get free help choosing?
Medicare.gov points to your local State Health Insurance Assistance Program (SHIP). It offers free personalized counseling and isn't connected to any insurance company or health plan.
Sources
- Medicare.gov: Your coverage options. medicare.gov/basics/get-started-with-medicare/get-more-coverage/your-coverage-options
- Medicare.gov: Compare Original Medicare & Medicare Advantage. medicare.gov/basics/get-started-with-medicare/get-more-coverage/your-coverage-options/compare-original-medicare-medicare-advantage
- Medicare.gov: Joining a plan. medicare.gov/basics/get-started-with-medicare/get-more-coverage/joining-a-plan
Reviewed against the linked pages on November 1, 2026. Medicare rules, plans and costs change each year, so confirm details on Medicare.gov before you decide. This article is an editorial summary and interpretation, not insurance or medical advice.
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