Medicare Advantage vs Medigap — which one to pick?

This is the most consequential Medicare decision you'll make. Most seniors hear it pitched as a binary, but the real question is which set of tradeoffs fits your life. Spoiler: the right answer depends on whether predictability or flexibility matters more, and how often you travel or see out-of-state specialists.

Two paths

Original Medicare + Medigap + Part D

The classic. Pay more monthly, pay less when sick.

Monthly cost: ~$200–400 (Part B + Medigap + PDP)
Predictability: High — Medigap pays your share
Network: Any provider that accepts Medicare
Travel: All 50 states, no referrals
Extras (dental etc.): Buy separately if needed
Prior auth: Rare on Original Medicare
Underwriting: After initial 6-month OE, yes

Medicare Advantage (MA-PD)

Lower monthly. Pay more when you use it.

Monthly cost: ~$0–50 premium + Part B
Predictability: Lower — copays add up
Network: Plan-specific HMO/PPO
Travel: Limited — plan defines area
Extras: Often included (dental/vision/OTC)
Prior auth: Common, especially specialty
Underwriting: Never — guaranteed issue at AEP

Pick MA if you check at least 3

Tight monthly budget. $0 premium is real; most WI MA plans charge nothing extra beyond the Part B you already pay.
Healthy and don't expect heavy use. If your typical year is 4 PCP visits + 1 specialist visit, MA copays add up to less than a Medigap premium.
Want extras built in. Dental cleanings, vision exams, hearing aids, OTC allowance — MA plans bundle these. Buying them separately on Medigap costs more.
Live in one place year-round. Wisconsin home, Wisconsin doctors, no second residence in another state.
Comfortable with networks and prior auth. You're fine calling the plan to confirm a specialist is in-network and OK with prior-auth waits for non-urgent care.
Dual-eligible (Medicare + Medicaid / MSP). D-SNPs are MA plans built for you with $0 premium, rich extras, and care coordination across both programs. See our D-SNP page.

Pick Original + Medigap + Part D if you check at least 3

You want maximum predictability.A Medigap Plan G covers nearly all out-of-pocket costs. You'll know your annual healthcare spend within a $200 deductible, almost regardless of usage.
You travel or have a second residence. Snowbirds, RVers, families spread across states — Medigap goes anywhere Medicare goes (50 states).
You see specialists frequently or have a chronic condition. High utilization means MA copays accumulate fast. Medigap front-loads the cost into a steady monthly premium.
You want to keep specialists who aren't in any one network. Original Medicare is accepted by ~95% of US doctors. MA networks vary — ask any specialist if they'd see you on a particular MA plan.
You hate prior auth fights. Original Medicare almost never requires prior auth. MA plans deny ~10% of prior auth requests in CMS audits.
You're still in your initial Medigap Open Enrollment. For 6 months after Part B starts, you can buy any Medigap without medical underwriting. After that, carriers can charge more or refuse to cover pre-existing conditions in most states. Lock in while you can.

Wisconsin-specific notes

Wisconsin Medigap is non-standardized

Wisconsin uses a different Medigap structure than 47 other states. Instead of letter plans (G, N, etc.), WI Medigap policies are sold as a “basic plan” plus rider options — Medicare Part A & B basic benefits plus optional riders for the Part A deductible, the Part B deductible, foreign travel, and so on. Confusing if you're comparing to out-of-state advice; helpful if you want to mix-and-match coverage.

Wisconsin has no “birthday rule”

Some states (CA, OR, etc.) let you change Medigap plans annually around your birthday without medical underwriting. Wisconsin does NOT. Once your initial 6-month Medigap Open Enrollment passes, switching Medigap plans usually requires medical underwriting (carriers can refuse or charge more for pre-existing conditions). Pick carefully the first time, or use a guaranteed-issue right (loss-of-coverage SEP, plan termination) when one applies.

The reverse switch is hard

Switching from MA back to Original + Medigap later is the single hardest move in Medicare. You can drop MA and return to Original at any AEP, but your guaranteed-issue Medigap window has usually closed — meaning carriers can underwrite you. If you developed a chronic condition while on MA, getting a Medigap policy at a reasonable price may be impossible.

Practical implication: if you're leaning Medigap and you're in your initial 6-month OE, take it.If you're leaning MA, know that you're likely committing for the long term.

Hybrid: MA Trial Right

First-time Medicare beneficiaries who try MA have a 12-month “trial right.” During those 12 months, you can drop MA and return to Original + buy any Medigap policy without medical underwriting. This makes MA a low-risk first choice for newcomers — you have a year to test it before you're locked in.

Quick decision matrix

Your situation	Probably
Healthy, tight budget, stay in WI	MA-PD
Snowbird (FL or AZ winters)	Original + Medigap + Part D
Several chronic conditions, see 3+ specialists	Original + Medigap + Part D
Already on Medicaid or MSP	D-SNP (a type of MA)
Family history of cancer, hate prior auth	Original + Medigap + Part D
New to Medicare, want to test MA	MA-PD with trial right
Have employer / TFL coverage	Original + Part D (employer plan covers gap)

Already on Original + Medigap and someone is pushing you to switch to MA?

Pause. Brokers earn 2× more selling MA than Original + Medigap; the “recommendation” may be more about their pay than your fit. Verify with Wisconsin SHIP at 1-800-242-1060 (free, no commission) before agreeing. Once you switch, getting Medigap back at a reasonable price may be impossible.

Run the questionnaire to see real options

We rank both Medicare Advantage and Medigap options for your county against your priorities. Honest about tradeoffs.

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