Noridian Mutual Insurance Company is an insurer headquartered in Fargo, North Dakota, United States. It offers health, dental, and life insurance, under several brands, including Blue Cross Blue Shield of North Dakota, which is the largest health insurance provider in the state of North Dakota, with a 96% market share in 2012. It owns Nordian Healthcare Solutions 2017 LLC, a large electronic data interchange (EDI) contractor to Medicare.