Introduction: The current organizational model in the field of Welfare, Public Health and Family in Flanders has reached its limits, resulting in severe accessibility problems, poor coordination between services, lack of balanced geographical spreading and suboptimal use of financial resources. As a first step, a concept note “Early and Nearby. Towards an integrated policy for children, youth, and families.” was drafted by the Flemish authorities. A masterplan was then developed in a participatory manner by four strategic circles and two consultation groups on specific themes. The aim of the strategic circle on diagnostic activities was to develop an alternative patient-centred organizational model, ensuring diagnostic activities as near and early as possible. Methods: A strategic circle was formed with stakeholders from all institutions offering diagnostic evaluations for children and adolescents in Flanders, patient associations representatives and representatives of the relevant policy departments. Participants had a high level of expertise in and knowledge of the organization and/or policy of diagnostic evaluations. Focus groups were organised per theme. Data was analysed iteratively by the strategic circle coordinators (EC, KC, LH). A member check was organized every meeting. Results: 24 stakeholders (3 patient representatives, 6 policy representatives and 15 representatives from the providing and scientific field) participated. The proposed organizational model is based on insights on conceptual models such as whole networks, stepped care, integrated care and patient-centred care. A shared vision on the concept of diagnostic evaluations is needed. Diagnostic evaluations should be integrated in the child’s overall care trajectory. Starting points of the organizational model are (1) the central position of the child and its family, (2) interprofessional and interorganizational sensitization, knowledge and expertise sharing, (3) interorganizational coordination and collaboration in a shared responsibility for ...