In order to assure high quality of nutrition and dietetic care as well as research, the implementation of a standardized terminology, such as the World Health Organization (WHO) International Classification of Functioning, Disability and Health for Dietetics (ICF-Dietetics) is indispensable. The aim of this study was to explore the clinical practicability and applicability of the ICF-Dietetics in the field of nutrition and dietetic practice prior to the implementation in order to develop criteria (points to consider) for a targeted implementation strategy.A focus group study including a pretest of the ICF-Dietetics was conducted. Subsequently, facilitators and barriers for a nationwide implementation of the ICF-Dietetics in clinical nutrition and dietetic practice were identified and linked to interventions (combining theory-based and group-based approach) using the Consolidated Framework of Implementation Research (CFIR) to organize and represent data and summarized in a logic model.In the pretest 55 clinical documentations which consisted of 248 different ICF-Dietetics categories were received. In four focus groups with 22 health professionals, 66 relevant higher-level themes and implementation strategy criteria (points to consider) were identified. These themes referred to all five domains of the CFIR, namely intervention characteristics, inner setting, outer setting, characteristics of individuals and implementation process and contained important barriers and facilitators that were linked to six implementation objectives as well as six context requirements and five main actors.This study provides facilitators and barriers to be addressed when implementing the ICF-Dietetics in clinical practice and shows potential interventions based on this analysis. A nationwide implementation was mainly seen as a great advantage for enhancing quality and continuity of care and for providing comparable data. However, it requires further refinements and a multifaceted implementation strategy where the engagement of leadership of institutions plays a crucial role. These results have provided a foundation for a targeted implementation strategy to increase the success, reproducibility and comparability.