Online Communities for Patients (POC) are very interactive sites where patients communicate with one another about diseases, therapies and how to deal with diseases and about personal experiences they have had. They also develop and share innovative ideas that make their everyday life easier. However, this happens mostly in an unsystematic and uncontrolled manner, as IT-supported interaction and communication tools in POC do not typically meet the specific requirements of ideation. For this ideation process, we developed a module called Ideenschmiede, which extends POC to support the collaborative and systematic idea development. The evaluation of the published ideas shows that the concept of the Ideenschmiede leads to ideas with an above-average quality level, indicating that collaborative ideation may also work in the healthcare context.