Marquette General

Hi everyone, I'm wondering if Marquette General Hospital is on the preferred list for Medicare. I was originally referred to Marshfield in Minocqua Wisconsin and was told that they don't qualify for Medicare because they don't do enough surgeries so they want to send me to Milwakee or Duluth but I would rather stay in Michigan if I can. Can someone help with this? Any help would be great. Thanks in advance Jeremy