Lennox Insurance, 115 S Main Ave, Sioux Falls, SD 57104, US

Wellmark Blue Cross and Blue Shield is a health insurance company that provides a variety of health coverage options to residents of South Dakota. The company has offices in Cedar Rapids and Sioux City, Iowa, and Rapid City and Pierre, S.D. Wellmark is a Des Moines, Iowa-based company that also operates Wellmark Blue Cross and Blue Shield of Iowa. Wellmark Blue Cross and Blue Shield offers a range of health insurance products and services to more than 1.6 million members in Iowa and 278,000-plus members in South Dakota. As a member of the Blue Cross Blue Shield Association, Wellmark is part of a national network of nearly 40 plans that insures more than 93 million people in all 50 states, the District of Columbia and Puerto Rico. Wellmark Blue Cross and Blue Shield is headquartered in Sioux Falls, S.D.