This is the executive summary of the final report on the first year evaluation of the Head Start/Medicaid Early and Periodic Screening, Diagnosis and Treatment (EPSDT) Collaborative Effort, a demonstration program initiated by the Office of Child Development (OCD)/HEW in 1974. In initiating the program, OCD/HEW set forth the following objectives: (1) to assess the benefits in terms of incrased services for both Head Start and non-Head Start children and to establish the dollar value of these services; (2) to determine any barriers which prevent the Head Start program from making maximum use of Medicaid/EPSDT to pay for required health services provided to Medicaid eligible children in local programs; (3) to analyze long-term program and policy issues concerning Head Start services to young children as a basis for improving those services in Head Start/Medicaid EPSDT. This executive summary presents major findings and issues of the study that may be pertinent to the interest of OCD policymakers and program administrators, as well as others concerned with quality child development and health services. (Author/MS)