Choosing between Medicare Advantage and a Medicare Supplement (also called Medigap) plan is one of the most important decisions you’ll make when enrolling in Medicare. Both options are designed to fill in gaps left by Original Medicare — but they work in very different ways.
In this guide, we’ll walk you through the key differences so you can make a confident, informed choice for your health and your budget.
What Is Original Medicare?
Before comparing your options, it helps to understand what Original Medicare actually covers. Original Medicare includes:
- Part A (Hospital Insurance): Covers inpatient hospital stays, skilled nursing facility care, and some home health services.
- Part B (Medical Insurance): Covers outpatient care, doctor visits, preventive services, and durable medical equipment.
While Original Medicare covers a significant portion of healthcare costs, it does not cover everything. That is where Medicare Advantage and Medicare Supplement plans come in.
What Is Medicare Advantage (Part C)?
Medicare Advantage plans are offered by private insurance companies approved by Medicare. When you enroll in a Medicare Advantage plan, you still have Medicare — but you receive your Part A and Part B benefits through the private insurer instead of directly from the government.
Most Medicare Advantage plans also include:
- Prescription drug coverage (Part D)
- Dental, vision, and hearing benefits
- Fitness programs and wellness perks
- Transportation to medical appointments (in some plans)
Medicare Advantage plans often have lower or even $0 monthly premiums — but you will typically pay copays and coinsurances when you receive care.
How Medicare Advantage Works
Medicare Advantage plans generally use a network of doctors and hospitals. Depending on the plan type — HMO, PPO, or PFFS — you may need a referral to see a specialist or you may be limited to in-network providers.
Each year, your plan’s costs, network, and covered benefits can change. You will want to review your plan during the Annual Enrollment Period (October 15 to December 7) to make sure it still meets your needs.
What Is Medicare Supplement (Medigap)?
A Medicare Supplement plan, commonly known as Medigap, is a private insurance policy that works alongside Original Medicare. It helps cover costs that Medicare leaves behind — such as deductibles, copayments, and coinsurance.
Unlike Medicare Advantage, Medigap does not replace your Medicare coverage. It simply picks up where Medicare leaves off.
With Medigap, you can typically see any doctor or specialist in the country who accepts Medicare — no referrals or network restrictions.
Medigap plans are standardized and labeled by letters (Plan G, Plan N, Plan F, etc.). Each plan type offers the same basic benefits regardless of which insurance company sells it, though premiums can vary between companies.
What Medigap Does Not Cover
Medicare Supplement plans do not include prescription drug coverage. If you have a Medigap plan, you will need to enroll in a separate Part D Prescription Drug Plan to cover your medications.
Most Medigap plans also do not cover dental, vision, or hearing — so you may want to explore standalone plans for those services.
Medicare Advantage vs. Medicare Supplement: Side-by-Side Comparison
Here is a quick look at how the two options compare:
- Monthly Premiums: Medicare Advantage often has lower or $0 premiums; Medigap premiums are typically higher but more predictable.
- Out-of-Pocket Costs: Medicare Advantage involves copays and coinsurances at the time of service; Medigap covers most of those costs.
- Provider Networks: Medicare Advantage usually requires in-network providers; Medigap allows any Medicare-accepting provider nationwide.
- Drug Coverage: Medicare Advantage often includes Part D; Medigap requires a separate Part D plan.
- Extra Benefits: Medicare Advantage often includes dental, vision, hearing, and fitness; Medigap generally does not.
Predictability: Medigap offers more predictable costs; Medicare Advantage costs can vary based on usage.
Which Plan Is Right for You?
The right choice depends on your personal health situation, financial priorities, and lifestyle.
Medicare Advantage may be a better fit if you:
- Want lower monthly premiums
- Prefer an all-in-one plan with drug coverage and extras
Are comfortable working within a provider network
Medicare Supplement may be a better fit if you:
- Travel frequently or see specialists across different states
- Prefer predictable, low out-of-pocket costs
- Want the freedom to see any Medicare-accepting provider
Not sure which direction to go? A licensed Medicare agent can review your specific situation and help you compare real plan options in your area — at no cost to you.
Get Personalized Help From a Licensed Medicare Agent
At Simple Medicare Choices, we believe every person deserves clear, honest guidance — without pressure or sales gimmicks. Our licensed agents are here to help you understand your options and find the plan that fits your life.
