Medicare Plan F was formerly the most comprehensive Medicare Supplement Plan offered. However, as of January 1, 2020, Medicare no longer allows insurers to sell Plan F to new Medicare subscribers. As a result, Plan G is now the most comprehensive coverage, offering eight of the nine benefits available through Medigap. The main difference between the two plans is that Plan F includes coverage for the Part B deductible while Plan G does not. For 2022, the Part B deductible is $170.10. Insurers offer both as high-deductible and traditional plans.