The SARS-CoV-2 virus is a virus newly identified in January 2020. The WHO defined COVID-19 as a health emergency of international importance. The clinical manifestation of the COVID-19 disease cannot be fully described in the short time. First insights in patients suffering from acute kidney injury (AKI) during COVID-19 indicate severe course with high mortality. The locally varying spread of SARS CoV-2 infection requires a better understanding of clinical course of COVID-19 in order to be able to establish future treatment approaches. The examination of attributable mortality and costs of COVID-19 will need to be studied on a multinational basis and therefore Kidney in COVID-19 Registry will particularly use a matched case control design.