I have been with Marshfield Clinic for 12yrs and never had a bill with medicare and my supplemental ins. I go every 6 months because of medications I'm on and blood tests. I went to Minocque Center and decided I would go to the new Rhinelander Center and now am receiving a bill because of the way they coded it. I've talked to the specialist and Medicare. Medicare said Marshfield coded it wrong, but I can't get anywhere with the specialist. I'm pissed!! I will be leaving the Marshfield Clinic after this! 12 years with a bill and now its all changed!!