United Concordia is a dental insurance company headquartered in Harrisburg, Pennsylvania, United States. It is one of the largest dental insurers in the United States. The company currently insures more than 8 million members worldwide. The corporation also operates regional offices covering the rest of the United States in Pennsylvania, Maryland, Virginia, North Carolina, Alabama, Florida, Georgia, Michigan, New York, California, Washington, Oregon, Arizona, New Mexico, Colorado, and Texas.