Once you have Medicare Part A and Part B, you face one of the biggest decisions in Medicare: how to cover the gaps Original Medicare leaves behind. Broadly, there are two paths — Medicare Advantage or a Medicare Supplement (Medigap) policy. This guide explains how they differ in plain language so you can figure out which fits your health, budget, and doctors. There’s no single “best” choice — only the one that’s right for you.
Maher Insurance Group is a licensed independent insurance brokerage and is not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. Any information we provide is limited to the plans we do offer. Contact Medicare.gov or 1-800-MEDICARE for information on all of your options.
The Two Paths, Side by Side
Both start from the same place — Original Medicare (Part A and Part B) — but they take different routes from there:
- Medicare Advantage (Part C): An “all-in-one” plan from a private insurer that includes your Part A and Part B coverage, usually bundles Part D drug coverage, and often adds extras. These plans typically use a provider network and have copays as you use care, up to a yearly out-of-pocket cap.
- Original Medicare + Medigap: You keep Original Medicare and add a Medicare Supplement policy that helps pay costs like deductibles and coinsurance, plus a separate Part D drug plan. Medigap is standardized and generally accepted by any provider that takes Medicare.
Important: you pick one path. A Medigap policy cannot be used with a Medicare Advantage plan.
How They Handle Cost
The biggest practical difference is when you pay. Medicare Advantage often has a low or even $0 monthly premium, but you pay copays and coinsurance as you receive care, with protection from a yearly out-of-pocket maximum. Medigap usually costs more each month, but in exchange your out-of-pocket costs when you need care are more predictable. Neither is cheaper in every situation — it depends on how much care you expect to use.
Doctors and Flexibility
If keeping a specific doctor or hospital matters to you, this is worth a close look. Original Medicare with a Medigap policy is accepted by essentially any provider nationwide that takes Medicare, which makes travel and specialist access simple. Medicare Advantage plans generally rely on networks, so care is most affordable in-network, and you’ll want to confirm your providers participate before enrolling.
Extras and Drug Coverage
Many Medicare Advantage plans bundle prescription drug coverage and may include extra benefits. With Original Medicare plus Medigap, drug coverage comes from a separate Part D plan you choose. Which structure serves you better depends on your prescriptions and how you like to manage coverage.
How to Think Through Your Choice
- Your doctors: Do you want to keep specific providers, or are you comfortable using a network?
- Your budget style: Do you prefer a lower monthly premium with pay-as-you-go costs, or a higher premium with more predictability?
- Your health: Do you use a lot of care, or very little?
- Travel: Do you spend time in other states where network access could matter?
There’s no wrong answer — just the trade-offs that fit your life. It’s worth comparing carefully, ideally with someone who can walk through the specifics for your ZIP code.
Get Free, No-Pressure Help Comparing
Choosing between these two paths is a lot to weigh, and it helps to talk it through. A licensed agent can compare your Medicare options at no cost — call Maher Insurance Group’s Medicare team at (866) 220-2834 or fill out our short questionnaire and we’ll reach out. Our clients have left us more than 1,199 five-star reviews on Google.
Frequently Asked Questions
What is the difference between Medicare Advantage and Medicare Supplement?
Medicare Advantage (Part C) is an all-in-one plan from a private insurer that replaces how you get Original Medicare, often bundling drug coverage and extras, usually with a provider network. A Medicare Supplement (Medigap) policy instead works alongside Original Medicare to help pay costs like deductibles and coinsurance, and is paired with a separate Part D drug plan. Neither is universally ‘better’ — it depends on your needs.
Can I have both Medicare Advantage and a Medigap plan?
No. Medigap policies only work with Original Medicare, not with Medicare Advantage. You choose one path or the other. If you’re on Medicare Advantage, a Medigap policy can’t be used to cover its costs.
Does Medicare Advantage or Medigap let me keep my doctor?
It depends. Original Medicare with a Medigap policy is generally accepted by any provider that takes Medicare, which is most of them. Medicare Advantage plans usually use provider networks, so it’s important to confirm your doctors and hospitals are in-network before enrolling.
Which costs more, Medicare Advantage or Medigap?
They spread costs differently. Medicare Advantage often has lower or no monthly premium but you pay copays and coinsurance as you use care, up to a yearly out-of-pocket maximum. Medigap typically has a higher monthly premium but more predictable out-of-pocket costs. The right fit depends on your health, budget, and how you prefer to pay.
When can I switch between Medicare Advantage and Medigap?
There are specific windows, such as your initial enrollment around turning 65 and the yearly Annual Enrollment Period (Oct 15–Dec 7). Switching from Medicare Advantage to a Medigap policy later can involve medical underwriting depending on your timing and state, so it’s worth checking your options carefully before you decide.
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