Medicare Supplement Overview
Medigap vs Medicare Comparison
When choosing Medicare coverage, understanding the difference between Medigap and Medicare Advantage is essential for making an informed decision. These two options work differently with Original Medicare and offer distinct benefits, costs, and coverage approaches. Knowing how each option functions will help you select the coverage that best meets your healthcare needs and budget.
Keep reading or jump to our Highlights and Frequently Asked Questions.
Understanding Medigap Insurance
What is Medigap?
Medigap, also known as Medicare Supplement Insurance, works alongside Original Medicare (Parts A and B) to help cover costs that Medicare doesn’t pay. These standardized policies are sold by private insurance companies and help fill the “gaps” in Original Medicare coverage.
Key Benefits of Medigap
- Predictable costs: Most Medigap plans cover Medicare deductibles, copayments, and coinsurance
- No network restrictions: You can see any doctor or specialist who accepts Medicare
- Guaranteed renewable: Your coverage cannot be cancelled as long as you pay premiums
- Travel coverage: Most plans provide emergency coverage when traveling outside the U.S.
Medigap Plan Options
There are 10 standardized Medigap plans (A, B, C, D, F, G, K, L, M, N) with Plan G being the most comprehensive option available to new Medicare beneficiaries. Each plan offers different levels of coverage, allowing you to choose based on your healthcare needs and budget.
For detailed information about Medigap coverage options and enrollment periods, visit the official Medicare.gov Medigap page.
Understanding Medicare Advantage
What is Medicare Advantage?
Medicare Advantage (Part C) is an alternative way to receive Medicare benefits through private insurance plans approved by Medicare. These plans replace Original Medicare and often include additional benefits like prescription drug coverage, dental, and vision care.
Key Features of Medicare Advantage
- All-in-one coverage: Combines hospital, medical, and often prescription drug coverage
- Additional benefits: Many plans include extras like dental, vision, hearing aids, and wellness programs
- Network-based care: You typically must use doctors and hospitals within the plan’s network
- Annual changes: Plans can modify their coverage, costs, and networks each year
Medicare Advantage Considerations
Most Medicare Advantage plans have networks of preferred providers, which means your choice of doctors and hospitals may be limited. However, these plans often have lower monthly premiums and may include benefits not covered by Original Medicare.
Comparing Costs and Coverage
Medigap Costs
With Medigap, you’ll pay:
- Monthly premiums for your Medigap policy
- Original Medicare premiums (Part B and possibly Part A)
- Separate Part D prescription drug plan premium
Medicare Advantage Costs
With Medicare Advantage, you’ll typically pay:
- Plan premium (often $0 but can vary)
- Original Medicare Part B premium
- Copayments or coinsurance for services
- Out-of-pocket maximums that limit your annual costs
Making Your Choice
The decision between Medigap and Medicare Advantage depends on your individual healthcare needs, budget, and preferences. Consider factors like your current doctors, prescription medications, travel plans, and desired level of coverage predictability.
Medicare Can Be Confusing
We understand. That's why we wrote a simple guide to help you decipher the terms, makes sense of the options and gain enough insight to make an informed decision.
If you're not ready to reach out to Bob and the Insurance Connection team, please grab your free copy of The ABC’s & D of Medicare. Learn More

Medigap vs Medicare Advantage
Frequently Asked Questions
Can I switch from Medicare Advantage back to Medigap?
Yes, but it can be challenging. You have a one-time opportunity during the Medicare Advantage Open Enrollment Period (January 1-March 31) to return to Original Medicare, but getting Medigap coverage may require medical underwriting unless you qualify for guaranteed issue rights.
Do I need Part D with Medigap?
Medigap plans don’t include prescription drug coverage, so you’ll need to enroll in a separate Medicare Part D plan if you want prescription drug coverage and don’t have creditable coverage from another source.
What happens to my Medicare Advantage plan if I move?
If you move outside your plan’s service area, you can enroll in a new Medicare Advantage plan in your new location, switch to Original Medicare with or without a Medigap policy, or choose a different coverage option during a Special Enrollment Period.
Insurance Connection USA is a division of Garrison Enterprises a licensed Insurance agency and not connected with or endorsed by the United States government or the federal Medicare program. We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. Medicare has neither reviewed nor endorsed this information. Not connected with or endorsed by the United States government or the federal Medicare program.
Important Highlights
Medigap supplements Original Medicare and provides predictable costs with no network restrictions, while Medicare Advantage replaces Original Medicare with an all-in-one plan that may include extra benefits.
Cost structures differ significantly: Medigap involves higher monthly premiums but more predictable out-of-pocket costs, while Medicare Advantage often has lower premiums but variable costs depending on services used.
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