Evidence has been prominent in certain judicial processes, in recent jurisdictional history; the case of medical expert evidence is highlighted within the processes of responsibility for the provision of health services, because an assessment is determined: a) if there were failures or not in medical-hospital care, b) if there are or not damages, and c) if such damages derive from wrong medical practices.At the CES University - located in Medellín – Colombia - there is a service of expert opinions, which are issued from the Center for Studies in Health and Law – CENDES -, the same that was created by the aforementioned Institution of Higher Education to be his delegate. To the various judicial authorities in the national territory, and that, as an auxiliary to justice, it is aimed at satisfying the immense needs of experts, who must have sufficient qualifications, skills and training for the truth required by litigation in matters of medical liability in civil matters and administrative litigation.