This is repository for the data and code used for the paper "Preferences of psychotherapists for blended mental health interventions in Germany: a discrete choice experiment". The ZIP folder contain a readme explaining the purpose of the different files and how to reproduce the analysis. The abstract of the paper is the following: Objectives: Digital treatment formats are emerging within mental health care. Evidence suggests that mental health care providers and recipients prefer a combination of digital and traditional elements within psychotherapy treatment formats, also called blended care (BC), over standalone digital formats. We examined the attitudes and preferences of licensed psychotherapists in Germany regarding such BC applications. Methods: We fielded a survey among psychotherapists, including questions about attitudes, previous experiences, and expectations regarding BC, as well as a discrete choice experiment. Attributes for the experiment were developed using a stepwise qualitative approach. A Bayesian D-efficient design was used to generate the choice tasks. The choice data were analyzed by applying mixed logit models. Results: The survey was completed by 200 psychotherapists. Attitudes towards BC were mainly positive, with strong reported intentions to use BC formats. In the choice experiment, recommendation from a professional society for a BC online component was the most important characteristic. Greater effectiveness and a larger share of face-to-face vs. online time were also desired features, while a financial incentive to use BC was less relevant. Discussion: Our results provide insights concerning the development and adoption of BC formats. The finding that a recommendation by a professional society is the most influential characteristic highlights the importance of including professional associations early in the development and evaluation of BC formats. Furthermore, our results imply that financial incentives may not be effective for encouraging wider adoption of BC.