The evaluation of the medical activity is a major concern for hospitals and public health services. With the introduction of coding (IDC-10 and CHOP classifications) hospitals are now able to analyze their medical activity. A way to improve physicians' acceptance in analyzing their work is to give them valuable feedback information. Building statistics tools is costly and time consuming. Therefore introducing data warehouse tools is helpful. Nice Code is an easy-to-use software that helps medical encoding while immediately offering understandable statistics. In Switzerland, physicians demand real feedback based on the data transmitted at the "cantonal" or federal levels and more transparency in third payer's decisions. In this respect, several cantons decided to equip public health services and hospitals with this tool. The goal is to give, physicians and economists, powerful tools for analyzing the medical activity.