I live in Alameda, and Dr. Richard Kochenburger is my OB/Gyn. He works in a practice at 2111 Whitehall Place (near South Shore) with two other doctors, Dr. Nancy Everett and Dr. Norman Takaki. Dr. Kochenburger delivered my two daughters at Alameda Hospital (the last one about 10 months ago), but the practice was moving towards delivering at Summit instead of Alameda Hospital for the very reasons you mentioned. I have had nothing but good experiences with Dr. Kochenburger and have heard positive things about the other two doctors as well. They were quite old-fashioned in that each doctor tried as much as possible to do their own deliveries (rather than whoever was on call). I also appreciated the Saturday hours. I am not sure if they accept Prudential Healthcare, but you can call them at 522-6544 to check.