Medicare Advantage vs. Original Medicare: Pay Upfront or Pay As You Go? The 2026 Michigan Decision Guide
"I picked the plan with the zero premium. It seemed like the smart move." That's the sentence I hear from nearly every client who walks in already enrolled in Medicare. I understand why, when Option A costs nothing a month and Option B costs $200, the zero looks obvious. It isn't, automatically. This is one of the decisions I walk through in Chapter Two of my book, You Worked Too Hard to Run Out of Money, and it's the one I get asked about most as AEP approaches. Here's the honest, both-sides version, with real Michigan numbers, not marketing.
The Two Models: Pay Upfront vs. Pay As You Go
The clearest way to frame this decision: Medigap is pay upfront. Medicare Advantage is pay as you go. With Medigap, you pay a higher fixed monthly premium in exchange for near-complete cost certainty — your annual exposure can be capped at the Part B deductible, full stop. With Medicare Advantage, you pay little or nothing in premium, but your costs vary with the care you use, protected by a Maximum Out-of-Pocket (MOOP) ceiling in a bad year. Original Medicare itself has no cap — Part B covers 80 percent of services with no limit on the 20 percent you owe, which is exactly the exposure Medigap was built to close. About 93 percent of U.S. physicians accept Original Medicare, with no referrals or network restrictions required.
Medigap: Cost Certainty, If You Move Fast Enough
Plan G, the most comprehensive Medigap plan available to new enrollees, covers your Part A deductible, Part A and Part B coinsurance, skilled nursing coinsurance through day 100, and foreign travel emergency care. The only gap left is the Part B deductible — $283 in 2026 — so your total annual exposure is capped there, whether it's a quiet year or a $200,000 hospitalization. In Michigan, Plan G runs $140 to $220 a month at 65, rising to roughly $200 to $260 by 70.
The part that trips people up: guaranteed acceptance only exists during your six-month Medigap Open Enrollment Period, starting the month you're both 65 and enrolled in Part B. Miss it, and Michigan insurers can require full medical underwriting — a history of heart disease, cancer, or diabetes can mean denial or unaffordable pricing. The one exception is a one-time trial right: enroll in Advantage first, leave within 12 months, and you can still buy Medigap without underwriting.
Medicare Advantage: Real Savings, Real Trade-offs
Most Michigan Advantage plans run $0 in added premium — you pay only your Part B premium ($202.90/month in 2026) — and typically bundle Part D plus dental, vision, hearing, and OTC allowances. The federal MOOP ceiling is $9,250 for 2026, but the real Michigan average runs $5,100 to $5,800 depending on plan and county.
The trade-offs are just as real: you're generally required to use in-network providers for non-emergency care, networks can change every January 1st, and many plans require prior authorization before certain procedures or specialist visits — friction Original Medicare doesn't have. If you have established specialists at Henry Ford, Detroit Medical Center, or Beaumont, confirm they're in-network before you enroll, not after.
The Real Michigan Numbers
At age 70 in Michigan, here's the complete monthly picture, and both paths share the same starting point: the $202.90 standard Part B premium most Medicare enrollees pay in 2026, regardless of which path they choose (higher earners pay more under IRMAA, and some lower-income enrollees pay less through a Medicare Savings Program). On top of that baseline, Medigap Plan G plus Part D adds roughly $234 to $300 a month, for a total of $437 to $503. Most Michigan Advantage plans add $0 on top of that same $202.90 baseline, so the fixed monthly cost is just the Part B premium, plus copays as care is used — typically $500 to $1,200 a year for a healthy enrollee. In a healthy year, that's $2,800 to $3,600 staying in your pocket with Advantage. But in a major health year, Medigap caps total exposure at $283. A serious illness on Advantage could cost $5,100 to $5,800 before the MOOP kicks in. Which one wins depends on your savings, your income, and how much financial uncertainty you can absorb — not which plan looks better in a brochure.
The 15-Year Math Nobody Shows You
Medigap premiums rise every year under attained-age pricing — a 70-year-old paying $230 a month today could be paying $300 to $350 by 80. Over 15 years, cumulative Medigap premiums can reach $45,000 to $60,000 or more. Advantage costs are lower but variable: a healthy stretch might run $500 to $1,200 a year in copays, while three or four serious health years approaching the Michigan MOOP could add $15,000 to $23,000. Rough 15-year total: $23,000 to $35,000 for Advantage versus $45,000 to $60,000-plus for Medigap. This math genuinely isn't settled — it depends entirely on your actual health trajectory, which nobody can predict in advance.
FAQ
Q: What's the single biggest mistake people make with this decision?
A: Missing the Medigap Open Enrollment Period. It's the only time you're guaranteed acceptance regardless of health history — once it closes, Michigan insurers can medically underwrite you, and a health condition can mean denial or pricing you out entirely.
Q: What is MOOP, and what's the real number in Michigan?
A: Maximum Out-of-Pocket — the ceiling on what a Medicare Advantage plan can charge you in a year before it covers everything else. The federal limit is $9,250 for 2026, but most Michigan plans set actual MOOPs closer to $5,100 to $5,800.
Q: Can I switch back to Original Medicare if I don't like my Advantage plan?
A: Yes, in two windows: AEP (October 15 to December 7) or, if you're already on Advantage, the Medicare Advantage Open Enrollment Period (January 1 to March 31) — a second chance most people don't know exists.
Q: I'm a veteran with VA health benefits — do I still need to enroll in Medicare?
A: Yes. VA coverage does not count as creditable employer coverage for Medicare Part B. Skipping Part B because you have VA benefits can trigger a permanent 10 percent penalty for every 12 months you go without it — a veteran who skips Part B from 65 to 75 faces a 100 percent surcharge on their premium for life.
Closing CTA
AEP opens October 15 — six weeks away. I take Medicare review appointments starting October 1. Bring your actual doctors, your actual prescriptions, and I'll run both paths side by side as an independent broker — no company affiliation. For the fuller picture, including the late enrollment penalties that never expire and more on the veteran's Medicare trap, Chapter Two of my book, You Worked Too Hard to Run Out of Money, is available now on Amazon. Book your October 1 slot at LifestyleSafety.com or call (313) 450-9543.