During his 28 years at Harvard Medical School, Benjamin Sachs, MD, helped launch a network of clinics to deliver a combination of primary and preventive healthcare to poor Boston residents. Sachs, who is now dean of Tulane University's medical school, is preparing for establishing a similar system in New Orleans. In Boston, about 200,000 people are treated each year at 25 community clinics. The neighborhood centers are designed to treat problems before they become major, and more expensive. Participants are referred to doctors if they need specialized care.