Medicare Advantage vs. Medicare Supplement: What's the Difference?
If you're approaching age 65 or reviewing your Medicare coverage, you've probably heard the terms Medicare Advantage and Medicare Supplement. But what exactly is the difference, and how do you know which one is right for you?
This is one of the most common questions we hear at Halbert Insurance.
Both options can help you manage healthcare expenses, but they work very differently. Understanding those differences is an important step toward making a confident Medicare decision.
What Is Medicare Advantage?
Medicare Advantage, also called Medicare Part C, is an alternative way to receive your Medicare benefits through a private insurance company approved by Medicare.
These plans provide your Medicare Part A (hospital) and Part B (medical) benefits, and most include Part D prescription drug coverage.
Many Medicare Advantage plans also offer additional benefits, which may include:
Dental coverage
Routine vision benefits
Hearing aid benefits
Fitness memberships
Other supplemental benefits, depending on the plan
Some Medicare Advantage plans have a $0 monthly plan premium, although you generally must continue paying your Medicare Part B premium.
One important consideration is that Medicare Advantage plans often use provider networks. Depending on whether you choose an HMO or PPO, you may have restrictions on which doctors and hospitals you can use, or you may pay more for out-of-network services.
Plans may also require prior authorization for certain medical services.
What Is Medicare Supplement Insurance?
Medicare Supplement Insurance, also known as Medigap, works alongside Original Medicare.
Original Medicare generally pays its share of approved medical expenses, and your Medicare Supplement policy helps pay certain remaining costs, depending on the plan you select.
For example, Medicare Supplement Plan G is a popular option because it covers many of the out-of-pocket expenses left by Original Medicare, although you remain responsible for the annual Part B deductible.
One of the biggest advantages of Medicare Supplement coverage is flexibility.
With Original Medicare and a Medicare Supplement, you can generally see any healthcare provider in the United States who accepts Medicare, without being restricted to a particular insurance company's provider network.
Medicare Supplement plans typically have a separate monthly premium. They also do not include outpatient prescription drug coverage, so many beneficiaries purchase a separate Medicare Part D plan.
Comparing Medicare Advantage and Medicare Supplement
FeatureMedicare AdvantageMedicare SupplementMonthly premiumsSome plans offer $0 plan premiumsSeparate monthly premiumDoctor networksOften HMO or PPO networksAny provider accepting MedicarePrescription coverageIncluded in most plansSeparate Part D planDental and visionOften availableGenerally not includedReferralsMay be requiredGenerally not requiredPrior authorizationMay be requiredGenerally not required for Original Medicare-covered servicesMedical expensesCopays and coinsurance varyHelps cover Original Medicare cost-sharingAnnual medical out-of-pocket limitYes, for covered Medicare servicesDepends on the Medigap plan's benefits
In either case, you generally continue paying your Medicare Part B premium.
Which Option Costs Less?
This is where Medicare decisions become more personal.
A Medicare Advantage plan may have a lower monthly premium, but you could pay copays or coinsurance when receiving medical services.
A Medicare Supplement policy typically has a higher monthly premium but may provide more predictable out-of-pocket expenses for Medicare-covered services.
For someone who rarely visits the doctor, a Medicare Advantage plan might initially appear less expensive.
For someone who frequently sees specialists or wants broader access to healthcare providers, a Medicare Supplement may be worth considering.
However, there is no single answer that applies to everyone.
The best comparison considers your total potential healthcare expenses, not just the monthly premium.
What If You Travel Frequently?
Travel is another important consideration.
Original Medicare generally allows you to receive covered services from any provider who accepts Medicare throughout the United States.
Medicare Advantage plans typically have defined service areas and provider networks. Emergency and urgent care are covered when needed, but routine out-of-network care may be limited or more expensive.
If you spend part of the year in another state, travel frequently, or maintain residences in different locations, this distinction can be especially important.
Coverage outside the United States is generally limited under Medicare, although certain Medicare Supplement policies and Medicare Advantage plans offer specific foreign travel benefits.
Planning a Move to Another State?
Your Medicare coverage options may change when you relocate. Learn what happens to Medicare Advantage, Medicare Supplement, and prescription drug coverage in our article, Moving to Another State? What Happens to Your Medicare Coverage?
Can You Switch Between Medicare Advantage and Medicare Supplement?
You may be able to switch coverage, but there is an important detail many people overlook.
While Medicare Advantage plans have established enrollment periods, obtaining a Medicare Supplement policy later may require medical underwriting.
Depending on your state, circumstances, and eligibility for guaranteed-issue protections, an insurance company may be able to decline your application or charge a higher premium.
Your initial six-month Medigap Open Enrollment Period generally begins when you're 65 or older and enrolled in Medicare Part B.
Understanding these enrollment protections before making your first Medicare decision can be extremely valuable.
Five Questions to Ask Before Choosing
Before selecting Medicare coverage, consider the following:
Are my preferred doctors and hospitals available under the coverage I'm considering?
What will my total annual healthcare expenses look like, including premiums and potential out-of-pocket costs?
Are my prescription medications covered affordably?
How important is the flexibility to see specialists or receive care while traveling?
Am I comfortable with the possibility of medical underwriting if I want to change to a Medicare Supplement later?
Your answers can help identify which type of coverage better fits your needs.
Get Personalized Medicare Guidance from Halbert Insurance
Choosing Medicare coverage shouldn't feel like guessing.
At Halbert Insurance, we believe understanding your options is just as important as choosing a plan.
As an independent Medicare insurance agency based in North Texas, we help individuals in multiple states compare Medicare Advantage and Medicare Supplement options.
Whether you're turning 65, retiring, moving, or simply reviewing your current Medicare coverage, we're here to help you make an informed decision.
Ready to explore your Medicare options?
Schedule a Medicare consultation with Halbert Insurance and let us help you find coverage that fits your needs, preferences, and budget.
Is Your Medicare Plan Changing for 2027?
Medicare Advantage plans can change their benefits, provider networks, and availability from year to year. If your current plan is changing or being discontinued, read Why Your Medicare Plan May Change in 2027 — And What You Should Do About It to understand your next steps.
About the Author
Jarrod Halbert is the founder of Halbert Insurance, an independent insurance agency based in The Colony, Texas. He has worked in insurance since 2016 and helps clients across 30 states understand Medicare coverage and enrollment options.
Halbert Insurance is an independent insurance agency and is not affiliated with or endorsed by the federal Medicare program. Plan availability, benefits, eligibility, and enrollment rights vary by individual circumstances and location. This article is provided for educational purposes.
