As a world-renowned health system, we’re home to four award-winning hospitals, more than 280 community clinics throughout Southern California, and the world-class medical research and clinical education capabilities of the David Geffen School of Medicine. Living in the Conejo Valley: The Conejo Valley, including the cities of West Hills, Calabasas, Westlake Village and Thousand Oaks, are just a short drive northwest of Los Angeles.