Plan F and Plan G are the two most popular Medigap plans. As you can see in the Medigap comparison chart, Plan F covers all the gaps in Medicare. Plan G is only slightly different, so it is also a popular seller. 

When you compare Plans F and G side by side, you’ll immediately notice that Plan G has only one difference: the Part B deductible. If you compare annual premiums for Plan G and the premiums save you more than you will pay out for the Part B deductible, then enrolling in Plan G makes sense. 

Plan G has also gained popularity over Plan F since Plan F is no longer available to new Medicare enrollees. Because Plan C and Plan F cover the Part B deductible, they are no longer available those who become eligible for Medicare in 2020 or later. 

In recent years, there has been a growing interest in Plan N, as well. Plan N offers lower premiums if you are willing to do a bit of cost-sharing. Unlike Plan F or G though, Plan N does not cover excess charges. You will want to read up on this and understand what that means before enrolling.