Most dental insurance plan have some type of dental provider date base.  So a good start when looking for a new dentist is to use the provider date base your dental insurance plan provides. Also in some plans by using the plan network of dental providers you receive better benefits under the plan. 

However you may still want to call the dental office to do further research on the potential dental office you have found. Here are a few tips on what to ask when searching for a new dentist.Ask about the dentist educational background and credentials

1) Ask what you should expect during the first exam.

2) Ask to make sure if the office staff goes over the treatment options and cost before work is started. It is important to make sure you have the right information including what is covered by your dental insurance plan and your cost before making treatment decisions.

3) How does the dental office file out claims and what is expected from you at the time of service.  Some dental office may file the claim and bill you latter for any unpaid balances. Where as other dental office may make you pay in full at the time dental services are render, and have you file out your own claim so premium benefits are paid back to you.

4) Know the office hours and how patient emergencies are handled outside of regular hours.

5) Ask any additional questions that are important to you in choosing a dentist.