Medigap offerings have been standardized by the
Centers for Medicare and Medicaid Services (CMS) into ten different plans, labeled A through N, sold and administered by private companies. Each Medigap plan offers a different combination of benefits. The coverage provided is roughly proportional to the premium paid. However, many older Medigap plans (these 'older' plans are no longer marketed) offering minimal benefits will cost more than current plans offering full benefits. The reason behind this is that older plans have an older average age per person enrolled in the plan, causing more claims within the group and raising the premium for all members within the group. Since Medigap is private insurance and not government sponsored, the rules governing the sale and offerings of a Medigap insurance policy can vary from state to state. Some states such as Massachusetts, Minnesota, and Wisconsin require Medigap insurance to provide additional coverage than what is defined in the standardized Medigap plans. Some employers may provide Medigap coverage as a benefit to their retirees. While Medigap offerings have been standardized since 1992, some seniors who had Medigap plans prior to 1992 are still on non-standard plans. Those plans are no longer eligible for new policies. Over the years, new laws have brought many changes to Medigap Policies. For example, marketing for plans E, H, I, and J has been stopped as of May 31, 2010. But, if someone was already covered by plan E, H, I, or J before June 1, 2010, they can keep that plan. The availability of Medigap plans M and N took effect on June 1, 2010, bringing the number of offered plans down to ten from twelve. Congress passed the bill H.R. 2 on April 14, 2015, which eliminated plans that cover the part B deductible for new Medicare beneficiaries starting January 1, 2020. Those who enrolled into Medicare after this date are not able to purchase plans F or C; however, people who enrolled into Medicare prior to then are still able to purchase plans F or C. Congress believes eliminating first dollar coverage plans will save Medicare money. In 2020, 58.8 percent of individuals turning 65 and first becoming eligible for Medicare picked Plan G as their Medicare Supplement plan choice. Plan N was the second most-popular choice accounting for 32.8 percent when turning age 65. ==Costs==