Medicare Advantage vs. Medicare Supplement: The Complete 2026 Guide

By Rodney Cummings, RSSA® | Legacy Wealth Services

If you’re approaching Medicare eligibility — or already enrolled and questioning your choice — the most important decision you’ll make is between Medicare Advantage and Medicare Supplement (also called Medigap). These two paths work very differently, and choosing the wrong one can cost you thousands of dollars per year.

This guide breaks down everything you need to know in plain English.

What Is Original Medicare?

Before we compare Advantage and Supplement, let’s start with the foundation: Original Medicare consists of two parts:

Part A — Hospital insurance (inpatient care, skilled nursing, hospice)
Part B — Medical insurance (doctor visits, outpatient care, preventive services)

Original Medicare covers about 80% of approved costs. The remaining 20% — plus deductibles and copays — is your responsibility. That’s where Advantage and Supplement plans come in.

Medicare Advantage (Part C): The Managed Care Option

Medicare Advantage plans are offered by private insurance companies approved by Medicare. When you enroll in an Advantage plan, the private insurer takes over your Medicare coverage — you use their network of doctors and hospitals instead of Original Medicare directly.

What’s Included

All Part A and Part B benefits (required by law)
Most plans include Part D prescription drug coverage
Many include dental, vision, and hearing (which Original Medicare doesn’t cover)
Some plans include fitness memberships, transportation, and over-the-counter allowances

How It Works

You pay your Part B premium (2026: $202.90/month) plus your plan’s premium (often $0–$50/month)
You use in-network providers for most services
You pay copays and coinsurance at the time of service
Annual out-of-pocket maximum: typically $4,000–$8,950 in 2026

Who Medicare Advantage Works Best For

✅ Relatively healthy individuals who rarely need specialist care ✅ People who prefer low or no monthly premiums ✅ Those who want dental, vision, and hearing bundled in ✅ People who stay close to home and use the same providers consistently

The Catch with Medicare Advantage

Medicare Advantage plans use provider networks. If you see a doctor outside your network, your costs go up significantly — or aren’t covered at all. If you travel frequently or spend time in multiple states, this can be a serious limitation.

Medicare Supplement (Medigap): The Comprehensive Coverage Option

Medicare Supplement plans work alongside Original Medicare — they don’t replace it. You stay on Original Medicare, and your Supplement plan pays most or all of the costs that Medicare doesn’t cover: copays, coinsurance, and deductibles.

What’s Included

Covers the 20% that Medicare doesn’t pay (on most plans)
Covers Part A deductible ($1,676 in 2026)
Covers Part B excess charges (important with Plan G)
No network restrictions — see any Medicare-accepting provider in the country

How It Works

You pay your Part B premium plus your Supplement premium ($150–$350/month depending on plan and age)
You pay little or nothing at the point of care (Plan G: just the Part B deductible of $257/2026)
You need a separate Part D plan for prescription drugs
Any doctor who accepts Medicare will accept your Supplement plan

The Most Popular Supplement Plans in 2026

Plan G — The Gold Standard Covers everything except the Part B deductible ($257). After that, you typically pay nothing for covered services. Most popular plan for new Medicare enrollees.

Plan N — The Value Option Lower premium than Plan G. You pay small copays ($20 for office visits, $50 for ER). Good for healthy individuals who rarely need care.

High-Deductible Plan G Even lower premium. You pay a deductible ($2,870 in 2026) before coverage kicks in. Good for very healthy people who want catastrophic protection at the lowest cost.

Who Medicare Supplement Works Best For

✅ People who see specialists regularly or have ongoing health conditions ✅ Frequent travelers or snowbirds who use providers in multiple states ✅ Those who want budget predictability and minimal paperwork ✅ Individuals who value being able to see any Medicare doctor without referrals

The Side-by-Side Comparison

Factor	Medicare Advantage	Medicare Supplement
Monthly premium	$0–$50 (avg)	$150–$350
Out-of-pocket max	$4,000–$8,950	Very low (after deductible)
Provider network	Required (HMO/PPO)	Any Medicare provider nationwide
Referrals needed	Often (HMO)	Never
Drug coverage	Usually included	Separate Part D plan needed
Dental/Vision/Hearing	Often included	Not included
Travel coverage	Limited to network	Nationwide (emergency: worldwide)
Predictability	Lower (variable costs)	Higher (fixed premium)
Underwriting	None (guaranteed issue)	May require health questions*

*Medicare Supplement plans may require medical underwriting if you’re not in your initial enrollment period. During your 6-month Medigap Open Enrollment (when you first enroll in Part B), you have guaranteed issue rights regardless of health.

The Real Cost Question: Which Is Cheaper?

This is where most people get confused. Let’s look at a realistic example:

Scenario: Moderate health needs, one major illness per year

Medicare Advantage (Plan with $0 premium):

Monthly premium: $0
Part B premium: $202.90/month
Annual specialist copays: $1,200
Annual hospitalization: $2,000
Total annual: ~$5,634.80

Medicare Supplement Plan G:

Monthly premium: $180/month
Part B premium: $202.90/month
Part B deductible: $257 (once/year)
Additional out of pocket: ~$0
Total annual: ~$5,091.80

In this scenario, Plan G is actually cheaper — and provides far more predictability. But if you’re very healthy and rarely need care, a $0-premium Advantage plan could save you money in a good year.

The key insight: Medicare Supplement costs are predictable. Medicare Advantage costs depend on how much care you need.

5 Questions to Ask Before You Choose

Do you have ongoing health conditions? If yes, a Supplement plan’s predictable costs usually win.
Do your current doctors accept Medicare? If they accept Medicare, they’ll accept your Supplement plan. With Advantage, you need to verify they’re in-network.
Do you travel or split time between states? Supplement plans follow you everywhere. Most Advantage plans don’t.
How important is bundled dental/vision/hearing? If these matter, Advantage plans typically include them; Supplement plans don’t.
What’s your budget for monthly premiums? If keeping the premium low is critical, Advantage plans often have $0 premiums.

Can You Switch?

From Advantage to Supplement: This is where people get stuck. After your initial enrollment period, switching to a Medicare Supplement plan may require medical underwriting. If you have significant health conditions, you could be denied — or charged much higher rates. This is why getting the right plan the first time matters enormously.

From Supplement to Advantage: Generally easier. You can switch to a Medicare Advantage plan during Annual Enrollment Period (October 15 – December 7) without medical underwriting.

The Bottom Line

Neither Medicare Advantage nor Medicare Supplement is universally “better.” The right choice depends entirely on your health, finances, lifestyle, and priorities.

What IS certain: this decision is too important to make without guidance. The difference between the right plan and the wrong one — over a 10-year period — can easily exceed $20,000.

At Legacy Wealth Services, I compare plans across multiple top-rated carriers and walk you through your specific options at no cost to you. There’s no sales pressure and no obligation — just clear, honest guidance.

Schedule your free Medicare consultation →

Rodney Cummings is a Registered Social Security Analyst (RSSA®) and independent insurance advisor licensed in 26 states. Legacy Wealth Services works with a wide portfolio of top-rated carriers to find the best fit for each client’s unique situation.

Medicare has neither reviewed nor endorsed this information.