Reitan is a former health plan executive whose career spans 36 years in senior leadership positions with Blue Cross and Blue Shield of Minnesota (BCBS of MN), and Health Care Service Corporation (HCSC). Most recently, she served as executive vice president with HCSC, where she oversaw Blue Cross and Blue Shield plan operations in five states covering more than 16 million members. Prior to that, Reitan served as president and chief operating officer of BCBS of MN, the state's largest health insurer. She also served as a member of the Board of Directors of Prime Therapeutics, Availity, and the Federal Employee Program Board. Reitan is currently an independent director for Alnylam Pharmaceuticals.