Hi Oksana. I haven't heard of any board members who have a primary care doctor from Cedar sinai. They do have a physician referral #800-233-2771. You can also e-mail Sandy.Park###cshs.org She works as public relations for Cedar sinai '"Bacterial Overgrowth & IBS. The number one gastro doctor that our members have seen is Dr. Mark Pimintal. Other gastro doctors are Stephan R. Targen, and Dr. Edward Feldman m.d. I hope this helps . Maybe some of the board members have more ino for you. Good luck.