The care of patients over long distances has a long tradition. Modern technology offers more and more possibilities for communication. While initially only radio signals could be exchanged, image transmission is now possible without any problems and is part of everyday life in many areas of medicine. Telemedicine includes communication between service providers with each other, with the patient, and also communication in medicine via electronic media. Success factors are the engagement of users, remuneration, legislation, human factors, interoperability, standards, performance indicators and compliance with data protection. The benefits and risks must be carefully weighed against each other. If necessary, telemedicine can bring expertise to the patient, so that not every patient has to be brought to the expert. Thus, optimal care at the optimal place can be made possible.