Educational content only. Not Medicare, insurance, or financial advice. Not affiliated with CMS, Medicare.gov, or SSA.
By Keith Guirao, founder and editor of Savvy Senior Central (Maven Media).
The choice between Original Medicare and Medicare Advantage is not “which company is best.” It is which delivery system you want for the same federal Part A and Part B entitlement, and which bill you are willing to leave open-ended.
Original Medicare is the federal program itself: Part A (Hospital Insurance) plus Part B (Medical Insurance). You use any doctor or hospital that takes Medicare. After the Part B deductible, you usually owe 20% coinsurance on Part B services, and Medicare.gov is blunt that there is no yearly limit on what you pay out of pocket unless you add something else (Medigap, Medicaid, employer, retiree, or union coverage).
Medicare Advantage (Part C) is a Medicare-approved private plan that must cover medically necessary services Original Medicare covers. You still pay the Part B premium. Most plans bundle Part D. Plans must set a yearly limit on what you pay for covered Medicare services. In exchange, you often accept networks, referrals, and prior authorization.
I have spent 18 years inside consumer marketing and lead generation in insurance and health, building the campaigns and forms that push people toward these products. That is operator experience, not a counseling credential. The mail that arrives around age 65 is usually a commission calendar. The structural trade is not.
What you are actually deciding
Medicare.gov’s compare page puts four axes in front of the premium number:
- Provider freedom: nationwide Medicare acceptors vs a plan network and service area.
- Cost shape: uncapped 20% (Original) vs a capped Part A/B out-of-pocket year (Advantage).
- Approval rules: usually no prior auth on Original vs possible prior auth and referrals on Advantage.
- Add-ons: separate Part D and optional Medigap on Original vs bundled drugs and plan-specific extras on Advantage.
Extras sell. Dental, vision, hearing, and gym discounts are plan-specific marketing, not a federal guarantee that every Advantage plan includes them at a useful level. Price extras against what you actually use.
Same entitlement, two payment systems
You need Part A and Part B to join Advantage. You must live in the plan’s service area and be a U.S. citizen or lawfully present. You still have Medicare; you get most A and B services through the plan card. Hospice is still billed to Original Medicare even if you are in Advantage. Pre-existing conditions, including ESRD, do not bar joining under current rules.
In Original Medicare you decide separately whether you want a Part D drug plan and whether you want Medigap. In Advantage you generally cannot buy Medigap to cover plan copays, and selling Medigap to someone enrolled in Advantage is illegal unless they are switching back to Original Medicare (or Advantage ends first).
That last rule is why the first-year choice is stickier than annual open enrollment advertising implies. You can often move between Original and Advantage every fall. Buying Medigap years later, after you have been in Advantage, is a different, often harder, problem.
2026 federal costs that apply either way
CMS published 2026 Part A and Part B amounts on November 14, 2025. These are federal figures, not plan quotes.
Part B (2026)
- Standard monthly premium: $202.90. Most people pay this every month, including in Advantage.
- Annual deductible: $283.
- Usual coinsurance after the deductible: 20% of the Medicare-approved amount when the provider accepts assignment.
- Higher-income people may also owe IRMAA (income-related monthly adjustment amount) on Part B, and on Part D if they have drug coverage. SSA and CMS publish the IRMAA brackets; check those pages for your tax situation rather than a marketplace estimator.
A $0 Advantage *plan* premium does not cancel the Part B premium. Some plans may help with Part B; that is a plan rule that can change each year.
Part A (2026)
- About 99% of beneficiaries pay no Part A premium (generally 40 quarters of Medicare-covered employment, as SSA determines).
- If you buy Part A: $311/month (30-39 quarters) or $565/month (fewer than 30).
- Inpatient hospital deductible per benefit period: $1,736.
- Days 61-90: $434/day; lifetime reserve days: $868/day; after day 150 in a benefit period you pay all costs.
- Skilled nursing facility: $0 days 1-20; $217/day days 21-100; all costs after day 100.
Advantage plans set their own copays for many of those same stays. The federal schedule above is the Original Medicare baseline.
Provider choice and prior authorization
| Feature | Original Medicare | Medicare Advantage |
|---|---|---|
| Doctors / hospitals | Any that take Medicare, anywhere in the U.S. and listed territories. You may pay more if a doctor does not accept assignment. | Often in-network providers in the plan service area for non-emergency care. Some plans cover out-of-network care at higher cost. Emergency and urgent care must be covered. |
| Specialists | Usually no referral. | You may need a referral. |
| Prior authorization | Usually not required for Medicare to cover services or supplies. | The plan may require approval before certain services or supplies are covered. Denial can mean you pay the full cost. |
If you split the year between states, see specialists at academic centers, or refuse to change doctors mid-treatment, nationwide Original Medicare acceptance often decides the year. If your doctors already sit inside a strong local network and you want one card that includes drugs, Advantage can be workable, but check the live network and Evidence of Coverage at Medicare Plan Compare, not last year’s brochure.
The out-of-pocket fork: uncapped 20% vs a plan maximum
Under Original Medicare, after you meet the Part B deductible you usually pay 20% coinsurance. Without Medigap, Medicaid, or other supplemental coverage, that 20% has no published yearly ceiling. A year of oncology, imaging, and specialist visits can stack.
Advantage plans must have a yearly limit on what you pay for covered Medicare services (in-network and out-of-network limits may differ). Once you hit the plan’s limit, you pay nothing further for those covered services for the rest of the calendar year. The dollar amount varies by plan and ZIP code; CMS does not publish one national Advantage maximum.
Premiums stack differently too. Original: Part B + optional separate Part D + optional Medigap. Advantage: Part B + possible plan premium (sometimes $0) + usually bundled Part D. Compare specific plans for your ZIP; there is no single national Advantage premium.
Drugs: separate Part D vs bundled
With Original Medicare you join a separate Part D plan if you want Medicare drug coverage. Most Advantage plans include Part D. If you join an HMO or PPO *without* drug coverage, you generally cannot add a separate Part D plan. MSA plans and some PFFS plans without drugs are exceptions Medicare.gov lists.
Covered Part D drugs have a yearly out-of-pocket cap of $2,100 in 2026. After that, you pay $0 copay/coinsurance for covered Part D drugs for the rest of the calendar year. That is a Part D rule, not a medical maximum for Original Medicare Part A/B services.
The 2026 Part D national base beneficiary premium is $38.99. Medicare uses it to estimate the late-enrollment penalty and Part D IRMAA. It is not “the price of Part D.” Plan premiums vary. Skip Part D at first eligibility and go 63 days or more without creditable drug coverage, and the penalty is generally an extra 1% per uncovered month of that $38.99 base, for as long as you have Part D.
If you leave an Advantage plan that included drugs and return to Original Medicare, you usually need a standalone Part D plan quickly to avoid a gap and a possible penalty.
Medigap only pairs with Original Medicare
Medicare Supplement Insurance (Medigap) helps pay Original Medicare cost sharing (deductibles, coinsurance, and copays depending on the lettered plan). You generally must have Part A and Part B, keep paying Part B, and buy one policy per person. In most states, lettered plans (G, N, and others) standardize benefits across sellers.
Critical timing: the federal Medigap Open Enrollment Period is generally six months beginning when you are 65 and enrolled in Part B. Inside that window, insurers in most situations must sell you a policy regardless of health history. Outside it (unless your state is more generous or a federal guaranteed-issue right applies), insurers may medically underwrite and may decline.
You cannot use Medigap to pay Advantage cost sharing. Choosing Advantage for several years and then wanting Medigap later is often harder than buying Medigap during that one-time window. Federal guaranteed-issue rights exist in limited situations; they are not a free annual do-over.
A first-time move into Advantage can trigger a 12-month trial right to return to Original Medicare and buy Medigap in some cases. That does not make the two products stackable while you stay in Advantage.
What Original Medicare skips and what “extras” really mean
Original Medicare generally does not cover hearing aids or fitting exams, routine physical exams, eye exams for glasses, or most dental care. It does not usually cover eyeglasses or contacts, except one pair of standard-frame glasses (or one set of contacts) after cataract surgery that implants an intraocular lens.
Advantage plans *may* offer extras Original Medicare does not: vision, hearing, dental, fitness. CMS’s own language is “may” and “most plans,” not every plan at a published national dollar amount. Read the Evidence of Coverage. Extra benefits can change year to year. They are not Part A and Part B.
Travel and care outside the U.S.
Original Medicare generally does not cover care outside the United States. Some Medigap policies cover emergency care abroad within policy limits. Advantage plans generally do not cover foreign care either, though some offer an extra emergency/urgent benefit while traveling. Confirm the plan document. Do not assume a cruise or winter abroad is covered because the brand looks national.
Inside the U.S., Original Medicare’s nationwide acceptance is usually simpler for dual homes and frequent travel than an HMO tied to one county.
When you can move between the two paths
- Initial Enrollment Period (IEP🙂 generally 7 months around your 65th birthday. You can join Advantage during IEP if you have A and B.
- Annual Open Enrollment (AEP🙂 October 15-December 7. Join, switch, or drop Advantage; move Original ↔ Advantage; manage Part D if you have Original. Changes effective January 1 if the plan gets your request by December 7.
- Medicare Advantage Open Enrollment (OEP🙂 January 1-March 31, only if you are already in Advantage. One change: switch Advantage plans, or drop Advantage, return to Original, and join a separate drug plan. You cannot use OEP to go from Original to Advantage.
Special Enrollment Periods exist for qualifying events (move, loss of coverage, and others). Details sit on Medicare.gov; they are not a monthly shopping window.
A practical decision sequence (not advice)
Run these against Medicare Plan Compare and your own records, then confirm with Medicare.gov, 1-800-MEDICARE, or SHIP:
- Doctors and hospitals you will not leave. If they are out of network for every viable Advantage plan in your ZIP, Original Medicare wins that year on access.
- Expected care intensity. Heavy specialist years without Medigap leave the uncapped 20% exposed. Light-use years with a low Advantage maximum out-of-pocket can favor the plan path for *that* year.
- Drug list and pharmacies. Enter prescriptions in Plan Compare. A $0 plan premium can still cost more if your drugs sit on expensive tiers or need prior auth.
- Travel and dual homes. Nationwide Original plus Medigap is usually simpler than a county HMO.
- Medigap clock. If you want Original with a supplement, the six-month Medigap open enrollment at 65/Part B is a closing door that AEP does not reopen.
This page does not rank carriers, name “best” Advantage plans, or treat a marketplace quote as a CMS figure.
FAQ
Can I have Medigap and Medicare Advantage at the same time?
No. You choose Medigap *or* Advantage, not both. Medigap cannot pay Advantage copays, deductibles, coinsurance, or premiums. Selling Medigap to someone in Advantage is illegal unless they are switching back to Original Medicare.
Does Original Medicare have a yearly out-of-pocket maximum?
No, not on its own. Medicare.gov states there is no yearly limit unless you have supplemental coverage (Medigap, Medicaid, employer, retiree, or union) or you join a Medicare Advantage Plan. Advantage yearly limits vary by plan.
Do I still pay the Part B premium in Medicare Advantage?
Yes. You must keep paying Part B to stay in the plan. Most people pay the 2026 standard of $202.90. A $0 plan premium or help with Part B does not cancel that federal premium.
Does Original Medicare cover hearing aids, routine dental, or routine vision?
Generally no. Advantage extras of that kind are plan-specific. Confirm each plan’s Evidence of Coverage rather than a brochure headline.
Is $38.99 the price of a Part D plan in 2026?
No. $38.99 is the 2026 national base beneficiary premium used for late-enrollment penalty math and Part D IRMAA. The 2026 yearly out-of-pocket cap for covered Part D drugs is $2,100.
When can I switch between Original Medicare and Advantage?
During IEP when you first get Medicare; during AEP (October 15-December 7, coverage January 1); and, if you are already in Advantage, during OEP (January 1-March 31) for one change. Special Enrollment Periods can apply for qualifying events. January-March OEP is not a window to join Advantage from Original Medicare.
What if I need care outside my Advantage plan’s network?
For non-emergency care, you may pay more or receive no coverage depending on the plan type. Emergency and urgently needed care must be covered. Read the plan rules before you travel or see an out-of-area specialist.
Are “$0 premium” Advantage plans free?
No. You still owe the Part B premium (and any IRMAA). Copays, coinsurance, and the plan’s maximum out-of-pocket still apply. The $0 refers to the plan premium, which can change each year.
Sources
Every figure above traces to CMS, Medicare.gov, or SSA. We do not cite insurance marketplaces for data. Figures last verified September 22, 2026 (ET).
- Medicare.gov: Compare Original Medicare & Medicare Advantage
- CMS: 2026 Medicare Parts A & B Premiums and Deductibles (Nov. 14, 2025)
- Medicare.gov: Medicare & You 2026 (Publication 10050)
- Medicare.gov: 2026 Medicare Costs (Publication 11579)
- Medicare.gov: How Medigap works
- Medicare.gov: Joining a plan
- Medicare.gov: Avoid late enrollment penalties
- SSA: Premiums for higher-income beneficiaries
- CMS: 2026 Medicare Part D Bid Information (national base beneficiary premium $38.99)
- CMS: 2026 MA and Part D Advance Notice Fact Sheet (Part D OOP threshold $2,100)
