Do you mean like new drs just starting out? Or drs leaving other practices to start their own? I'm assuming you are trying to target new drs for marketing purposes. You can always watch the papers. New drs or drs starting a practice usually have ads or articles in the newspaper announcing that they are opening up. Also, you can check with hospitals to see if they have a list available of new drs coming into the area or if they have a residency program, they may have a list of drs ready to complete their residency.