The goal of this paper is to present the research conducted for systemizing network elements and analyzing their interconnection that emerged during the establishment and functioning of health care innovation project of psychenet - the Hamburg Network for Mental Health.Semi-structured manual-based face-to-face interviews with project researchers and leaders were conducted. The gathered data was validated and updated several times during the project duration. The results include a systematic description of 186 network elements developed during the overall project and respective subprojects. The elements were consolidated in a web-based database and integrated into the psychenet.de public website. A clustering of elements was conducted and modules of elements were generated based on the interconnection between the related elements.The systematic description of network elements as well as determination of their interconnection and dependency can play an important role in understanding the emergence and functioning of integrated mental health networks. The innovative medical networks prove to be complex service systems and urge for a grounded application of integration techniques in order to be successfully transferred and adopted in other regions.