National Holistic Institute 1347 Redwood Way, Petaluma, CA94954 The National Holistic Institute is one of the most respected massage therapy schools in the world. It has been hosting…More students and teaching massage therapy since 1979. It is the first massage school in Northern California to be accredited. Once students graduate, a network of other graduates and supporters help place students in jobs. The NHI offers continuing education classes, financing and placement services.