Doctor Karagiannakis is an Assistant Professor of Internal Medicine and Hepatology at the Medical School of the National and Kapodistrian University of Athens in Greece. Since May 2024, he has been working at the 4th Department of Internal Medicine at Attiko University Hospital. From 2021 to 2024, he served as the Deputy Director of the 3rd Department of Internal Medicine at Metropolitan General Hospital in Athens, where he was responsible for the Liver Unit. Before that, from 2008 to 2021, he worked as an Academic Research Fellow in the 1st Department of Gastroenterology at Laiko General Hospital, Medical School of the National and Kapodistrian University of Athens. His fields of interest include Viral hepatitis, Liver cirrhosis, Portal Hypertension, Non-Invasive tests, MASLD, and Cirrhotic Cardiomyopathy.