Acute kidney injury (AKI) is an important health-care problem. Over the last decades, many innovative therapies and diagnostic approaches have been tried; however, none of these has been able to confirm consistently that they lead to improved outcomes. Much focus has been placed on intensive care unit (ICU)-associated AKI, whereas the bulk of AKI still concerns patients not in the ICU. Involvement of nephrologists in the care of AKI patients is necessary to further improve outcomes. It is unclear whether new technologies, such as biomarkers, are helpful and could replace nephrology consultation.