@RLS There is no name sorry. It is through my husbands past employer. We paid for monthly insurance through them and when he hit Medicare it automatically went to a supplemental plan they have set up. They cover/covered a certain amount of insurance premiums/costs based on how long he worked for them. it is all through them.
If you work for a large company check with them as several companies have options like that and they are usually pretty good.
Here is a nice thread that explains about Medicare
Of course information changes and a lot of people are interested in who uses what. You could start a thread asking people what they are using for Medicare and how they like it. I have a feeling it would be very useful for a lot of people. Before (and even after) you get Medicare it feels like a very confusing landscape to figure out.