He has pioneered the treatment of carcinoid tumor patients with interferon and somatostatin analogues and developed assays for tumor markers such as Chromogranin A and radiological procedures including specialized PET scans. In 1991 Dr. Öberg received the European Interferon Research reward. In 2003 he received the award “Eminent Scientist Year 2003” by the International Research Promotion Council (IRPC) and World Scientist Forum and in 2004 he was awarded the European Gold Medal in Endocrinology from the English Endocrine Society. In November 2006 he received the Harry Boström Award Lecture at Swedish Medical Society. The University Hospital Clinical Research Award in 2011.