Medicare Supplement vs. Medicare Advantage
These are the two most common ways people add to or replace Original Medicare, and they work very differently. Neither is universally "better" — they trade off cost, flexibility, and predictability in different ways. This page walks through those tradeoffs in detail.
Side by Side
Feature-by-Feature Breakdown
Feature
Medigap
Medicare Advantage
Monthly premium
Separate premium in addition to Part B (varies by plan letter, age, and location)
Often $0–$100+, in addition to Part B
Cost when you need care
Very low — most or all coinsurance is covered
Copays and coinsurance apply per service, up to an annual cap
Doctor and hospital network
Any provider nationwide that accepts Medicare
Limited to the plan's network (HMO/PPO), usually regional
Referrals
Never required
Often required for HMO plans; usually not for PPO plans
Extra benefits (dental/vision/hearing)
Not included — would need a separate policy
Frequently included as a plan perk
Prescription drug coverage
Not included — requires a separate Part D plan
Often bundled into the plan
Travel coverage
Covered nationwide; some plans include limited foreign travel benefits
Typically limited to the network service area, though emergencies are covered nationwide
Switching later
Best guaranteed-issue rights exist during your initial Medigap Open Enrollment Period; switching later may require health underwriting
Can generally switch during Annual Enrollment without health questions
Cost predictability
High — fixed premium, minimal surprise bills
Moderate — capped, but variable month to month
Lifestyle Fit
Which Tends to Fit Which Lifestyle
These are general fit signals, not recommendations — many people's situations don't fall neatly into either column.
Medigap tends to fit people who...
✓ Travel often or split time between two states
✓ Want to keep specific specialists without checking a network
✓ Prefer a predictable monthly bill over a lower sticker price
✓ Have ongoing or complex medical needs
✓ Are enrolling during their Medigap Open Enrollment window
Medicare Advantage tends to fit people who...
✓ Want a lower monthly premium and are comfortable with variable costs
✓ Are generally healthy and don't expect frequent specialist visits
✓ Want dental, vision, and hearing built into one plan
✓ Are comfortable staying within a local network
✓ Like having one combined card for medical and drug coverage