There is no generalized way of evaluating clinical care activity in a comprehensive Cancer Center. Time clinical units is the most common procedure worldwide. In a spanish group it has been developed a new system based on the daily real activity of each medical oncologist of his team. In adittion, it has been collected the daily activity from January 2016 to December 2017 of each doctor considering different values (from 1 to 4) depending on the complexity of the activity. Follow up visit of a patient [1], treatment visit [2], Clinical trial visit or Inpatient visit (3) and New Patient First visit (4). Then it was added all the daily values of each medical oncologist. Moreover, the clinical activity of each Oncology Unit changed clearly when it was applied the new method. For example, breast cancer unit change from 24% to 21 % of the global activity, GI Unit from 47% to 49%, Lung Unit from 13% to 14%. In Genitourinary and Gynecological cancer and Prostate tumor units there are no change. These changes draw the different complexity of each Oncology Unit. It was clearly useful to get a better information of the real clinical activity of each team and cancer center. To sum up, this tool can be useful to unifique and compare the different complexity in the clinical activity of Medical Oncology Teams, units and hospitals allocating resources based on this new system.