My sister-in-law (age 72) was turned down by an insurance company for medicare supplement coverage due to a diagnosis. She had to go with AARP; My understanding is that AARP cannot turn you down due to any diagnosis. AARP is by far the largest medicare supp supplier. I had to use AARP supp when I went on medicare because of many diagnosis, including mg. I used an agent in CA even though I live in TN - she did everything on the internet and was very helpful explaining everything (no cost to you). If you would like her name, please send me a private message.

Juanita