Medicare Supplement Insurance (Medigap) helps cover the gaps in Original Medicare, including deductibles, copayments, and coinsurance. At $100-$350 per month, Medigap policies can save thousands in out-of-pocket costs, especially for seniors with frequent medical needs.
Medicare Supplement Insurance Cost
$100 - $350/moUpdated March 2026
Frequently Asked Questions
How much does Medicare supplement insurance cost?
Medigap premiums range from $100-$350/month depending on the plan, your age, location, and insurer. Plan G (most popular) averages $150-$250/month. Plan N averages $100-$200/month. Prices vary significantly between companies for identical coverage.
What is the best Medigap plan?
Plan G is widely considered the best Medigap plan for new enrollees. It covers nearly all gaps in Medicare (deductibles, copays, coinsurance, excess charges) except the Part B deductible ($257/year in 2026). Plan N is a good budget option with slightly less coverage.
When should I enroll in a Medigap plan?
The best time to enroll is during your Medigap Open Enrollment Period — the 6 months starting when you turn 65 and are enrolled in Medicare Part B. During this period, you cannot be denied coverage or charged more for pre-existing conditions. After this period, insurers can deny you or charge higher rates.
Is Medicare supplement insurance worth it?
For most seniors, yes. Without Medigap, Medicare Part A has a $1,632 deductible per benefit period and 20% coinsurance for Part B services. A single hospital stay or surgery can result in thousands in out-of-pocket costs. Medigap plans cap this exposure.
What is the difference between Medigap and Medicare Advantage?
Medigap supplements Original Medicare — you keep Original Medicare and the supplement covers your gaps. Medicare Advantage replaces Original Medicare — a private insurer handles all your coverage. Medigap has higher premiums but fewer restrictions (any doctor who accepts Medicare). Medicare Advantage has lower premiums but restricted networks.