Medicare Supplement Plans, All equally accepted on the road?

I was one of those "idiot billing clerks" for a number of years. There is a ton of misinformation in these responses. I cannot tell you how much misery I saw caused by choosing a plan based on "Cousin Bob's" advice. Go to www.medicare.gov and order the "Medicare and You" publication. There are many community organizations in our area that present seminars on coverage. Make sure they aren't selling something before you go if you find some in your area. You are doing the right thing by starting your search early.