Bjørn Kristoffer Erikstein (born 1952) is a Norwegian physician and civil servant, with prominent positions in the health sector. He took his cand.med. and dr.med. degrees at the University of Oslo. From 1993, he was a specialist in oncology. He worked as a physician at Radiumhospitalet and Ullevål Hospital. He entered hospital administration as vice chief executive of the Southern Norway Regional Health Authority in 2003. In December 2004 he took over as chief executive. From 2003 he was also chair of and Radiumhospitalet, later Rikshospitalet-Radiumhospitalet after a merger. This double role as executive and chair within the same structure was abolished in 2005.