This report details the history and characteristics of the Health Start program, explains the evaluation design and methodological problems in the study, describes the background and health characteristics of approximately 10,000 children enrolled in the program, and delineates the conclusions and recommendations emerging from the evaluation. Data was collected in order to answer the following two questions: (1) How can health services for low-income children best be coordinated?, and (2) What are some innovative ways to provide education, health detection, treatments, and entry into an on-going program that could be adopted by summer and full-year Head Start programs? Because of the program design and the many community, project and health service variables at work, only tentative conclusions could be reached about the factors affecting project success. Much was learned, however, about the health care needs of poor children from birth to six years of age. The evaluation did yield enough data on project approaches so that program models can be developed which may be adopted in the Head Start program. Health Start did provide health services to 20,000 children. (CS)