Just in case the previous link wasn't enough: http://doctorsthatdo.org/doctors-that-do. I find that it is better to go and see the doctor--pay the office a visit rather than just calling or emailing. There are a lot of weirdos out there who want to be doctors, and they need to know that you aren't one of them, so do both of you a favor and go meet them face to face. Always remember that it is a real privilege to have a physician allow you to be present with his/her patients--I don't think I realized it as much as a premed, but I realized it more once I was in medical school and now even more now that I am a resident.