Medicare Supplement Plan Guide — Compare Plans A Through N

How Medicare Supplement Plans Are Standardized

Medicare Supplement plans are labeled with letters: A, B, C, D, F, G, K, L, M, and N. Each letter represents a specific set of benefits defined by the federal government. Because the benefits are standardized, a Plan G from Carrier A covers the same services as a Plan G from Carrier B. The only variable is the monthly premium, which can vary significantly between insurance companies for identical coverage.

Plan G — The Most Popular Choice for New Enrollees

Since Plan F was discontinued for new Medicare enrollees in 2020, Plan G has become the most popular Medicare Supplement plan. Plan G covers everything Medicare Supplement can cover except the Part B deductible ($240 in 2024). After you pay that one annual deductible, Plan G covers virtually all remaining Medicare-approved costs — including the Part A deductible, coinsurance, and hospital costs up to 365 days after Medicare benefits are exhausted.

• Covers Part A deductible and coinsurance
• Covers Part B coinsurance and copays
• Covers skilled nursing facility coinsurance
• Covers foreign travel emergency care (80%)
• Only gap: Part B annual deductible ($240 in 2024)

Plan N — A Lower-Premium Alternative

Plan N offers similar coverage to Plan G but with lower monthly premiums in exchange for small copays at the point of service: up to $20 for office visits and up to $50 for emergency room visits that don't result in inpatient admission. Plan N is a good option for people who want comprehensive coverage but are willing to pay small copays to reduce their monthly premium.

High-Deductible Plan G — For the Budget-Conscious

High-Deductible Plan G has a much lower monthly premium than standard Plan G. You pay all Medicare-covered costs until you reach the annual deductible ($2,800 in 2024), after which Plan G benefits kick in. This plan works well for people who are generally healthy and want catastrophic protection at a low monthly cost.

Plans K and L — Shared-Cost Options

Plans K and L cover a percentage of Medicare cost-sharing rather than 100%. Plan K covers 50% of most gaps; Plan L covers 75%. Both have annual out-of-pocket limits. These plans have lower premiums but require you to share more costs when you use healthcare services.

How to Choose the Right Medicare Supplement Plan

The right plan depends on your health, how often you use healthcare, and your budget. Most people who want comprehensive, predictable coverage choose Plan G. People who want lower premiums and are comfortable with small copays often choose Plan N. AG Insurance compares rates from multiple carriers for the same plan letter to find you the best value.