Medicare Advantage vs. Medicare Supplement (Medigap): Which Is Right for You?

Two Ways to Enhance Original Medicare

Original Medicare (Part A + B) has significant gaps: a $1,632 Part A deductible per benefit period (2024), 20% coinsurance for Part B services with no out-of-pocket maximum, and no drug coverage. Two main options address these gaps:

1. Medicare Advantage (Part C) — Private plans that replace Original Medicare
2. Medigap (Medicare Supplement) — Policies that pay alongside Original Medicare

They work very differently. Understanding those differences is the key to making the right choice.

Medicare Advantage: The All-in-One Approach

Medicare Advantage plans are offered by private insurers approved by CMS. They cover everything in Part A and B (and usually Part D drugs), often with additional benefits like dental, vision, hearing, and fitness programs.

Key features:
- Often $0 monthly premium (you still pay your Part B premium)
- Limited to a provider network (HMO or PPO structure)
- Annual out-of-pocket maximum (protects against catastrophic costs)
- Extra benefits: dental, vision, OTC allowances, and more
- Plans are county-specific — options vary by where you live

Medigap: The Freedom Approach

Medigap plans are sold by private insurers but are standardized by the federal government (in most states). Plan G, for example, covers the same benefits regardless of which company sells it — only the premium differs.

Key features:
- Use any doctor or hospital that accepts Medicare nationwide — no networks
- Predictable, low cost-sharing once your deductible is met
- Higher monthly premium than most Advantage plans
- No drug coverage — need a separate Part D plan
- Best plans: Plan G (covers most gaps), Plan N (lower premium, some copays)

Side-by-Side Comparison

Monthly Premium: Varies by plan, location, income, and eligibility
Provider Networks: Advantage typically uses a network | Medigap generally permits Medicare-accepting providers
Extra Benefits: Advantage may include additional benefits | Medigap generally focuses on Medicare cost-sharing
Out-of-Pocket Maximum: Advantage plans have a plan limit | Medigap helps cover eligible cost-sharing according to the policy
Drug Coverage: Advantage may include Part D | Medigap requires separate Part D coverage
Plan Stability: Advantage plans can change annually | Medigap benefits are standardized

When Medicare Advantage Makes More Sense

Consider Medicare Advantage if:
- You're comfortable with a provider network and your preferred doctors are in-network
- The $0 or low premium is important to your budget
- You want dental, vision, and hearing benefits bundled in
- You're generally healthy with minimal specialist or hospital needs
- You live in a metro area with strong carrier competition and broad networks

When Medigap Makes More Sense

Consider Medigap if:
- You want to see any Medicare-accepting doctor or specialist without network restrictions
- You travel frequently (Medigap works nationwide; Advantage is usually regional)
- You have complex health needs requiring multiple specialists
- You want predictable, fixed costs regardless of how much care you use
- You value simplicity: pay one predictable amount and Medicare/Medigap handles the rest

The Bottom Line

There's no universally 'better' option — it depends on your health, budget, lifestyle, and preferred providers. Review the Medicare options available in your zip code and evaluate which approach aligns with your actual health needs and financial goals.

Important: If you're newly turning 65, you may have guaranteed issue rights for Medigap during your Initial Enrollment Period. If you start on Medicare Advantage and later want to switch to Medigap, you may face medical underwriting; rules and protections vary by state.