Policy makers, program planners and health care providers must be able to identify at-risk populations and geographic areas of need, implement programs to effect change, and track and report the results to achieve success in today’s health care environment. Mapping and visualization tools can enhance the use of data to characterize a population’s health and social services needs, target interventions and compare outcomes across different population subgroups. In Massachusetts, visualization and analytic tools are used to manage 1915c Medicaid Waiver programs, track operations, improve efficiency, report quality measures, monitor program integrity and plan for expanded service needs.