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If you’re approaching 65, or you’re already on Medicare and reconsidering your coverage, you’ve probably run into this question more than once: should I get Medicare Advantage or a Medicare Supplement plan?

It’s one of the most important healthcare decisions you’ll make, and honestly, it’s confusing by design — there’s a lot of marketing noise out there. This guide breaks it down in plain English: what each option actually is, what it costs in 2026, and how to figure out which one fits your situation.

The Quick Answer

• Medicare Advantage (Part C) replaces Original Medicare. A private insurance company manages your coverage, usually bundles in prescription drug coverage, and often comes with a low or $0 monthly premium — but you pay more when you actually use care, and you’re generally limited to a network of doctors.
• Medicare Supplement (Medigap) works alongside Original Medicare. You keep Original Medicare as your primary coverage, pay a higher fixed monthly premium, and in exchange you get very predictable costs and the freedom to see almost any doctor in the country who accepts Medicare.

You cannot have both at the same time — federal law requires you to choose one path.

What Is Medicare Advantage?

Medicare Advantage is an alternative way to receive your Medicare benefits. Instead of the government paying providers directly (as with Original Medicare), a private insurance company approved by Medicare manages your care.

Here’s what typically comes with a Medicare Advantage plan:

• Everything covered under Original Medicare Part A (hospital) and Part B (medical)
• Prescription drug coverage (Part D) bundled in, in the majority of plans
• Extra benefits Original Medicare doesn’t offer, such as dental, vision, hearing aids, and sometimes a gym membership benefit
• A defined network of doctors and hospitals (HMO or PPO structure)
• An annual out-of-pocket maximum that caps what you’ll pay in a bad year

Most Medicare Advantage plans have low monthly premiums — the nationwide average is close to $14/month for 2026, on top of your Part B premium. Some plans have a $0 premium. The trade-off is that you’ll pay copays for office visits, coinsurance for hospital stays, and in some cases you’ll need prior authorization before certain procedures or treatments are approved.

What Is Medicare Supplement (Medigap)?

Medicare Supplement, or Medigap, is a different approach entirely. You stay on Original Medicare, and a Medigap policy simply helps cover the costs Original Medicare leaves on the table — things like deductibles, copayments, and coinsurance.

Key things to know about Medigap:

• It only works alongside Original Medicare, not in place of it
• It does not include prescription drug coverage — you’d need a separate stand-alone Part D plan
• Monthly premiums are higher than most Medicare Advantage plans, but your out-of-pocket costs when you actually need care are far more predictable
• You can see any doctor or hospital in the U.S. that accepts Medicare — roughly 93% of physicians nationwide — with no network restrictions
• Coverage isn’t tied to a service area, which matters a lot if you travel or split time between states

Plan G is currently the most popular Medigap plan among people newly eligible for Medicare, since it covers nearly all the gaps Original Medicare leaves behind.

2026 Costs at a Glance

Whichever path you choose, these Original Medicare costs apply as your starting point in 2026 (these are the official CMS figures and are the same no matter which plan you pick):

Cost	2026 Amount
Part B monthly premium	$202.90 (higher if your income is above certain thresholds)
Part B annual deductible	$283
Part A hospital deductible (per benefit period)	$1,736
Part A daily coinsurance, days 61–90	$434/day
Skilled nursing facility coinsurance, days 21–100	$217/day

On top of these baseline numbers:

• Medicare Advantage: average premium around $14/month, but your maximum out-of-pocket exposure for in-network care can run up to $9,000/year in 2026, depending on the plan.
• Medicare Supplement: premiums vary by plan, insurer, and state (often somewhere between $100–$300+/month for Plan G), but once you’re paying that premium, most of your remaining costs are covered — no $9,000 surprise bill waiting for you.

The honest way to think about it: Medicare Advantage trades a lower monthly bill for less predictable costs if you get seriously ill. Medigap trades a higher monthly bill for near-total predictability.

Medicare Advantage vs Medicare Supplement: Side-by-Side

	Medicare Advantage	Medicare Supplement (Medigap)
Replaces Original Medicare?	Yes	No — works alongside it
Monthly premium	Low, often $0–$30	Higher, often $100–$300+
Out-of-pocket costs when you use care	Copays, coinsurance, up to annual max	Minimal to none, depending on plan
Prescription drug coverage	Usually included	Separate Part D plan needed
Provider network	Limited to plan network (HMO/PPO)	Any doctor accepting Medicare, nationwide
Extra benefits (dental, vision, hearing)	Often included	Not included
Travel coverage	Usually limited outside network area	Nationwide, coast to coast
Annual out-of-pocket maximum	Yes, required by law	No cap, but costs are already low
Underwriting to switch later	Not usually required to join	May require medical underwriting outside your initial enrollment window

Pros and Cons

Medicare Advantage — Pros:

• Low or no monthly premium
• Prescription drugs and extra benefits bundled into one plan
• Built-in annual spending cap

Medicare Advantage — Cons:

• Network restrictions — your doctor might not be in-network
• Costs can add up quickly if you need a lot of care in a given year
• Some services need prior authorization

Medicare Supplement — Pros:

• Predictable, stable costs
• Freedom to see any Medicare-accepting provider nationwide
• Great for frequent travelers or people who split time between states

Medicare Supplement — Cons:

• Higher fixed monthly premium
• No drug coverage — you’ll need a separate Part D plan
• Switching into a Medigap plan later in life may require medical underwriting in most states, which could mean a higher price or being turned down based on health history

Which One Is Right for You?

There’s no universally «best» option — it depends on your health, budget, and lifestyle. As a general rule of thumb:

• Medicare Advantage tends to fit you well if: you want the lowest possible monthly cost, you’re comfortable with a network of doctors, and you value having dental/vision/hearing benefits bundled in.
• Medicare Supplement tends to fit you well if: you want maximum predictability, you travel frequently or live in more than one state, you have ongoing health conditions that require specialists, or you simply don’t want to worry about network rules.

If you’re not sure, it often helps to look at your current doctors and prescriptions first — check whether they’re covered under a specific Medicare Advantage plan’s network and formulary before assuming it will save you money.

Can You Switch Later?

Yes, but with some important caveats. You can generally switch between Medicare Advantage and Original Medicare (with or without a Medigap policy) during:

• The Annual Enrollment Period (AEP), October 15 – December 7 each year
• The Medicare Advantage Open Enrollment Period, January 1 – March 31, if you’re already in a Medicare Advantage plan

The catch is on the Medigap side: if you drop a Medigap policy and want to get one again later, insurers can require medical underwriting in most states — meaning your health history could affect your price or eligibility. Some states have stronger guaranteed-issue protections than others, so it’s worth checking your specific state’s rules before you decide.

Frequently Asked Questions

Can I have both Medicare Advantage and Medicare Supplement at the same time? No. Federal law does not allow you to be enrolled in both at once. You choose one path: Medicare Advantage, or Original Medicare plus a Medigap policy.

Which one is cheaper overall? It depends on how much healthcare you use. Medicare Advantage usually wins on monthly premium; Medigap usually wins on total predictability and can be cheaper overall in a year with major medical expenses.

Does Medicare Advantage cover prescription drugs? Most plans include Part D drug coverage built in, but not all — always confirm before enrolling.

Do I need a separate drug plan with Medigap? Yes. Medigap does not include prescription drug coverage, so you’ll need to enroll in a standalone Part D plan separately.

Can I switch from Medicare Advantage to Medigap without a health screening? Generally, yes, if you’re within your initial enrollment window or a guaranteed-issue situation applies. Outside of that, most states allow insurers to use medical underwriting, which could affect your price or eligibility.

Bottom Line

Medicare Advantage and Medicare Supplement solve the same problem — filling the gaps Original Medicare leaves — in two very different ways. Advantage plans lean toward lower monthly costs and bundled extras, with more moving parts and network rules. Medigap leans toward predictability and freedom, with a higher fixed monthly bill.

Before enrolling in either, compare specific plans available in your ZIP code using the official Medicare Plan Finder tool, or talk with a licensed insurance agent or your local State Health Insurance Assistance Program (SHIP) for free, unbiased guidance.

Disclaimer: Plan availability, premiums, and benefits mentioned in this article are based on 2026 figures and general industry averages, and can vary by state, county, and insurer. Always confirm current details directly with Medicare.gov, 1-800-MEDICARE, or a licensed agent before making a decision.