While a number of companies offer Medigap insurance, they can only offer policies from 11 standardized plans. Each is simply assigned a letter: A, B, C, D, F, G, K, L, M and N. Some states also offer a high-deductible version of Plan F (although it, too, will come off the list for newly eligible Medicare beneficiaries after 2019).
This standardization means that, say, Plan A at one insurance company is the same as Plan A at another. Be aware, however, not every plan is available in all states. And three states — Massachusetts, Minnesota and Wisconsin — standardize their plans differently.
The most popular Medigap option has been Plan F, which is considered the Cadillac of Medigap plans due to its generous coverage and higher premium.
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