What shall I ask a prospective provider to determine if this practice is right for me?

First and foremost, gather literature from the practice to determine if the practice has a similar philosophy, belief system and values.  Make a phone call and ask to speak with the provider or one of the nurses, inquire about your health concern and seek some guidance.  Identify if the practice has a mission and vision that corresponds with your values.  Perhaps the practice will have a health fair or an open house that would enable you to see the environment and meet the staff to assess congruence.