Medicare Advantage vs. Supplement

How Original Medicare plus Medigap works

Original Medicare pays first, then your Medigap plan covers most or all of the remaining cost-sharing. You can see any doctor or specialist in the country who accepts Medicare, no referrals required. Your monthly costs are higher but predictable. You still need a separate Part D plan for prescription drugs.

• Provider access: Any Medicare-accepting provider nationwide, no network.
• Predictable costs: Little to no out-of-pocket after premiums with plans like Plan G.
• No referrals: See any specialist directly.
• Separate drug plan needed: Must enroll in a standalone Part D plan.

How Medicare Advantage works

Medicare Advantage (Part C) replaces your Original Medicare coverage. You receive all Part A and B benefits through the private plan, usually with a network of doctors and hospitals. Most plans include drug coverage (MAPD). Many offer dental, vision, and hearing. Premiums can be as low as $0, but in-network restrictions apply.

• Lower or no premium: Many plans have $0 monthly premium.
• Annual out-of-pocket cap: Advantage plans must cap your annual out-of-pocket costs.
• Bundled benefits: Often includes dental, vision, hearing, and fitness programs.
• Network restrictions: HMO plans require in-network providers and referrals. PPO plans have more flexibility at higher cost.

How to decide between the two

There is no single right answer. The right choice depends on your specific situation. Consider these factors:

• How often you use healthcare: If you have chronic conditions or frequent care needs, predictable costs of a Medigap plan may save you more despite higher premiums.
• Your doctors: If you have established doctors or specialists, confirm they are in-network before choosing an Advantage plan.
• Travel: If you split time between states or travel frequently, a Medigap plan's nationwide access is often more practical.
• Budget: If keeping monthly premiums low is the priority, Advantage plans typically win. If avoiding large unexpected bills matters more, Medigap is often better.

One critical timing note on Medigap

When you first enroll in Part B, you have a 6-month Medigap Open Enrollment Period during which insurers must sell you any Medigap plan at standard rates regardless of your health history. After that window closes, most states allow insurers to use medical underwriting and can charge you more or deny coverage based on pre-existing conditions. Switching from Medicare Advantage back to Medigap later in life can be difficult or expensive.

Common questions