Health- and social care are complex domains, requiring the collaboration of several professions and several care provider organizations within and between the domains. In this paper, we describe the collaboration between care providers in the Stockholm County and the municipality of Stockholm, highlighting how the information is exchanged, which IT system that supports the exchange, and legal prerequisites for the collaboration. We identify several problems in current practices, including the lack of system integration, and the underutilization of existing digital solutions. We also suggest several solutions aimed at improving the technical infrastructure for digital collaboration. These include the integration of IT systems, simplification of access to essential information, and the adoption of modern APIs to facilitate better communication among healthcare providers. We also present legal issues for the collaboration and how they can be addressed.