Do you start going with a parent to his doctor about getting tested for Alzheimer's or where do you start?

You know the parent has Alzheimers and just don't know where to start getting the help the parent needs. I live in the US and parents in Alberta Canada and am going up there to get things started as none of the other siblings have done anything yet. Afraid my father has blown all the money they have on scam lotteries and am going to find out when I get there about their financials but most importantly would like to know where or how to start with doctors. I know he is not going to go to his own doctor and ask to be tested for Alzheimers so do I make an appointment and go with him?