Original Medicare lets you see any doctor in the U.S. that takes Medicare. Medicare Advantage bundles coverage in a private plan, adds extras like vision, hearing and dental, and often limits you to the plan’s network. Pick based on how much you value free choice of doctors versus bundled benefits.
The short answer
- Original Medicare: Part A and Part B. You pay for services as you get them, and Medicare pays part.
- Medicare Advantage (Part C): you join a Medicare-approved plan from a private company. You need both Part A and Part B first.
- Drugs: add a separate Part D plan to Original Medicare. Most Advantage plans include drug coverage.
- Medigap: works with Original Medicare. Buy it within 6 months of first getting Parts A and B, or you may not get a policy or may pay more.
- Free help: your State Health Insurance Assistance Program (SHIP).
How do the two options compare?
| Original Medicare | Medicare Advantage (Part C) | |
|---|---|---|
| How you pay | You pay for services as you get them; Medicare pays part and you pay your share | You join a Medicare-approved plan from a private company |
| Doctors and hospitals | Any that takes Medicare, anywhere in the U.S. | In many cases only those in the plan’s network |
| Includes | Part A (Hospital Insurance) and Part B (Medical Insurance) | Part A and Part B, and most plans include Part D |
| Drug coverage | You can add a separate Part D plan | Most plans include it; in most types you can’t join a separate drug plan |
| Extra benefits | Supplemental coverage can help pay your share: Medigap, employer or union coverage, or Medicaid | Most plans offer extras Original Medicare doesn’t, such as vision, hearing and dental |
The source, Medicare.gov’s “Your coverage options” page, gives no prices, so this guide gives none.
Who should pick which?
- Original Medicare fits you if you want any doctor or hospital in the U.S. that takes Medicare, with no network limits. You can add Medigap and a separate drug plan.
- Medicare Advantage fits you if you want one plan with Part A, Part B, usually drug coverage, and extras such as vision, hearing and dental. Check that your doctors are in the network first.
- Mistake to avoid: joining a drug plan late. Drug coverage is optional, but a penalty can follow.
What do I need before I can choose?
You choose how to get coverage once you’ve signed up for Part A and Part B. You must have both to join a Medicare Advantage Plan. You may also have other coverage, such as employer or union, military or veterans’ benefits.
How does Part D (drug coverage) work?
- With Original Medicare you can join a separate Medicare drug plan. Drug coverage is optional and available to everyone with Medicare.
- Each plan has a list of covered drugs called a formulary, divided into tiers by cost. A drug in a lower tier costs less than one in a higher tier.
- Most plans charge a monthly premium on top of your Part B premium, and you pay other costs when you get prescriptions.
- Late enrollment penalty: you may pay it if you don’t join a drug plan when you first get Medicare and go 63 days or more without creditable drug coverage. It goes up the longer you wait. In most cases you pay it for as long as you have Part D coverage, even if you switch plans.
What is Medigap?
Medicare Supplement Insurance (Medigap) is extra insurance from a private company that helps pay your share of costs in Original Medicare. Key rules:
- You generally need Part A and Part B to buy it.
- Some policies cover travel outside the U.S.
- Generally it doesn’t cover long-term care, vision, dental, hearing aids, private-duty nursing or prescription drugs.
- If you’re under 65 you might not be able to buy one, or may pay more.
- Policies are standardized and in most states named by letters, such as Plan G or Plan K. Benefits in each lettered plan are the same whatever company sells it, so price is the only difference.
- If you don’t buy one within 6 months of when you first get Part A and Part B, you may not be able to buy a policy or you may pay more.
Where can I get free help choosing?
Your local State Health Insurance Assistance Program (SHIP) offers free personalized health insurance counseling. SHIPs aren’t connected to any insurance company or health plan. For the basics of each part, see Medicare parts A, B, C and D explained.
This is general information, not insurance or medical advice.
Questions and answers
Do I need Part A and Part B for Medicare Advantage?
Yes. You must have both to join a Medicare Advantage Plan.
Can I use any doctor with Medicare Advantage?
Not always. In many cases you can only use doctors in the plan’s network. Original Medicare works with any doctor or hospital in the U.S. that takes Medicare.
Is Medicare drug coverage mandatory?
No, it is optional. You may pay a late enrollment penalty if you go 63 days or more without creditable drug coverage after first getting Medicare.
Does Medigap cover prescription drugs?
Generally no. It also generally excludes long-term care, vision, dental, hearing aids and private-duty nursing.
Does the Medigap company change my benefits?
No. Benefits in each lettered plan, such as Plan G, are the same whatever company sells it. Only the price differs.
Sources
Facts read on 22 October 2026.
Part of the guide: Social Security, Medicare and Taxes: Guides From Official Sources
