Dr. Gish began his medical training in 1974 when he was enrolled in the Pharmacy School at the University of Kansas. He transferred to the University of Kansas Medical School in 1977 and finished his MD degree in 1980. He went on to complete a 3-year Internal Medicine residency at the University of California, San Diego and a 4-year Gastroenterology and Hepatology fellowship including transplant medicine at the University of California Los Angeles during which time he was awarded the NIH Physician-Scientist Award to study calcium signaling in liver cells.
After completing his training, Dr. Gish moved to San Francisco and took a position at the California Pacific Medical Center (formerly known as Pacific Presbyterian Hospital). He became the Co-Medical Director of the Liver Transplant Program in 1988 and then the Medical Director of the Liver Transplant Program in 1994 until 2010. In December 2010, Dr. Gish moved to San Diego to join the faculty of UCSD as a Clinical Professor of Medicine, Section Chief of Hepatology, and Director of the Center of Excellence for Hepatobiliary Disease and Abdominal Transplantation (C.H.A.T.).
In September of 2013, Dr. Gish left UCSD to form a consulting company, Robert G. Gish Consultants LLC to provide consultative support to Hepatology Centers and Liver Transplant Programs who wish to start or grow their programs through pathways of quality and optimal patient care that is integrated with research and education. Today, Dr. Gish is a Clinical Professor, Adjunct, Department of Medicine, at the University of Nevada in Las Vegas.