Medicare Advantage vs Medigap Plan G Comparison
Medicare Advantage (Part C) has low or zero premiums but restricted networks and copays. Medigap Plan G has higher premiums but predictable out-of-pocket costs and any-doctor access. Calculate total annual cost for both.
Medicare Advantage (Part C) Mechanics
MA plans are private alternatives to Original Medicare. Premiums often $0-$50/month. Includes Part A, Part B, usually Part D drugs, plus extras (dental, vision, fitness). Restricted networks (HMO or PPO), referrals required for specialists, prior authorization for major procedures. OOP max around $6,700-$8,500 in 2026.
Medigap Plan G Mechanics
Plan G is a supplement to Original Medicare. Premium $1,500-$3,500/year depending on state and age. You pay the Part B deductible ($240 in 2026); Plan G covers all other gaps. Any doctor that accepts Medicare. No referrals, no prior auth. Predictable annual cost. Premiums rise with age.
The Switching Trap
Most people can switch from MA to Medigap during the annual enrollment period — but Medigap requires medical underwriting outside the initial 6-month Medigap open enrollment window. If you developed serious health conditions on MA, you may be denied Medigap or charged 50-150% higher premiums. This 'one-way door' is the biggest hidden cost of starting on MA.
Medicare Advantage vs Plan G: Who Each Plan Actually Suits
The Medicare Advantage vs Plan G choice is rarely about price alone. Per Medicare.gov and the 2024 KFF Medicare Advantage report, the decision usually splits on three factors: (1) Where you live. If your area has strong MA networks (most big metros), MA is competitive; if you live in a rural area or travel frequently, Plan G's "any provider that accepts Medicare" rule is worth thousands. (2) Current health. If you are healthy at 65, MA's $0-50 premium is hard to beat — but you lock in the switching trap. If you have any chronic condition (diabetes, heart disease, cancer history), Plan G during your initial 6-month Medigap Open Enrollment window (no medical underwriting) is almost always the smarter long-term move. (3) Income. Plan G's $1,500-3,500/year premium is a major budget line for someone on Social Security alone, but worth it for higher-income retirees who can afford peace of mind. Updated 2026-06-17.
Source: Medicare.gov 2026 plan comparison data, KFF Medicare Advantage report 2024, CMS Plan G standardization rules. Last updated: 2026-06-17.