Medicare Advantage vs Original Medicare: Which Actually Costs Less Over 10 Years?
Medicare Advantage vs Original Medicare: Which Actually Costs Less Over 10 Years?
Medicare Advantage (Part C) plans advertise $0 monthly premiums and include drug coverage. Original Medicare with a Medigap supplement costs $165-300+/month. On the surface, Advantage plans look like the obvious choice. But total cost depends on how much care you actually use.
Medicare Advantage plans use networks, prior authorization, and cost-sharing that can result in significant out-of-pocket costs for people who need substantial care. Original Medicare with Medigap offers predictable costs regardless of utilization. The right choice depends on your health status, provider preferences, and risk tolerance.
The Cost Structure Comparison
| Feature | Medicare Advantage (Typical HMO) | Original + Medigap (Plan G) |
|---|---|---|
| Monthly premium | $0-45 | $165-300 (Medigap) + Part B ($185) |
| Part B premium | $185 (included) | $185 |
| Annual deductible | $0-250 | $257 (Part B only) |
| Doctor copay | $15-40 | $0 after deductible |
| Specialist copay | $30-65 | $0 after deductible |
| Hospital (per day) | $250-400/day (days 1-5) | $0 |
| Out-of-pocket max | $3,500-8,300 | None needed (Medigap covers gaps) |
| Drug coverage | Included (Part D) | Separate Part D plan ($15-80/mo) |
| Network restrictions | Yes (HMO/PPO) | No (any provider accepting Medicare) |
Scenario Modeling: Low, Medium, and High Utilization
The total annual cost depends entirely on how much care you use.
Low Utilization (healthy, 2-3 doctor visits/year)
- Medicare Advantage: $2,220/year ($185/mo Part B)
- Original + Medigap G: $4,500/year ($185 Part B + $200 Medigap + $40 Part D)
- Advantage saves: $2,280/year
Medium Utilization (managed conditions, 8-10 visits, 1 specialist)
- Medicare Advantage: $3,800/year (premiums + copays + drug costs)
- Original + Medigap G: $4,800/year (fixed — utilization doesn't change cost)
- Advantage saves: $1,000/year
High Utilization (surgery, hospital stay, extensive specialist care)
- Medicare Advantage: $7,500-10,500/year (copays, coinsurance up to MOOP)
- Original + Medigap G: $4,800/year (still fixed)
- Original saves: $2,700-5,700/year
The crossover occurs around $4,000-5,000 in annual medical spending. Below that, Advantage wins. Above it, Original Medicare with Medigap wins.
The 10-Year View
Health utilization tends to increase with age. A 65-year-old choosing Medicare today will likely experience low utilization initially, trending toward medium and high utilization by age 75-80. This means Medicare Advantage looks cheaper in the early years but becomes more expensive as utilization rises.
The Toravine optimizer models this trajectory using actuarial health spending curves by age, allowing you to see the 10-year NPV comparison for both options.
For detailed Part D drug plan optimization, Toravine matches your specific medications to plan formularies for accurate cost modeling.
The Lock-In Risk
A critical but often overlooked factor: Medigap plans in most states use medical underwriting after your initial enrollment period. If you start with Medicare Advantage at 65 and decide to switch to Original Medicare + Medigap at 72, you may be denied Medigap coverage or charged a health-rated premium due to pre-existing conditions developed during your Advantage years.
This makes the initial choice more consequential than the annual cost comparison suggests. Choosing Advantage at 65 may effectively lock you into Advantage for life.
For beneficiaries also considering how Medicare interacts with retirement withdrawal strategies, IRMAA surcharges on Part B and Part D premiums add another layer to the optimization.
Sources
- CMS Medicare & You 2026 Handbook
- KFF Medicare Advantage 2026 Data Note
- AHIP Medigap Premium Survey, 2025
- Medicare.gov Plan Finder Cost Estimates