The scientist’s investigation covers issues in Internal medicine, Ulcerative colitis, Inflammatory bowel disease, Gastroenterology and Disease. His Internal medicine study frequently draws connections between adjacent fields such as Surgery. His study in Ulcerative colitis is interdisciplinary in nature, drawing from both Genome-wide association study, Single-nucleotide polymorphism, Colitis and Cohort.

The various areas that Morten H. Vatn examines in his Genome-wide association study study include Primary sclerosing cholangitis, Locus, Immunology and Genetic association. His Inflammatory bowel disease research includes themes of Odds ratio, Physical therapy, Quality of life and Pediatrics. His Gastroenterology research integrates issues from Colorectal cancer and Genotype.