Jerry,I never needed a prescription for any of my hearing aids purchased over the past 30 years.
The audiologists in my part of the world are not MDs - they are hearing technicians.

You can order the Bose hearing aids directly from Bose, which is the only place they are available. When I purchased my first hearing aids, I walked in to the hearing aid store near my home, a young girl did a hearing test, took a wax impression of my ear and ordered then from New York. They arrived three days later, she adjusted the EQ, and I paid them $1,100, and that was 3 years ago. The only thing that has changed at that store was the prices, which are sky high.

Good luck,

Gary