The Internet is increasingly used as a source for information and knowledge. Even in the field of healthcare, information is widely available. Patients and their relatives increasingly use the Internet in order to search for healthcare information and applications. "Health 2.0" - the increasing use of Web 2.0 technologies and tools in Electronic Healthcare - promises new ways of interaction, communication, and participation for healthcare. In order to explore how Web 2.0 applications are in general adopted and implemented by health information providers, we analysed the websites of all German health insurances companies regarding their provision of Web 2.0 applications. As health insurances play a highly relevant role in the German healthcare system, we conduct an exploratory survey in order to provide answers about the adoption and implementation of Web 2.0 technologies. Hence, all 198 private and public health insurances were analysed according to their websites. The results show a wide spread diffusion of Web 2.0 applications but also huge differences between the implementation by the respective insurances. Therefore, our findings provide a foundation for further research on aspects that drive the adoption.