The first step requires both an operational definition of community and a robust infrastructure for data analysis. Census tracts, small geographic areas of approximately 4000 people, are often used to define “communities” because of their correlation with some known health indicators such as asthma.2 A robust data-analysis infrastructure, including an advanced electronic health record (EHR), can facilitate measurement of quality of care and outcomes for the delivery system's patient population according to their community of residence as determined with geocoding techniques