Medicare Supplement
A Medicare Supplement Insurance plan (also called Medigap) can help cover some of the out-of-pocket costs that Original Medicare doesn't, such as copays and deductibles. Each type of plan offers a different combination of basic health insurance benefits.
There are quite a few Medicare Supplement Plans (also called Me to choose from. The most popular plans are Plan G and Plan N. As you can see from the chart, Plans G and N provide the most coverage. All supplements are mandated by the government, so you will get the exact same coverage no matter which carrier you choose