 In May 2007, Holland made national headlines with her market conduct exam on Humana, a large provider of Medicare supplemental insurance.Holland's market conduct exam proved widespread misconduct by agents working for Humana, including that consumers were enrolled in Humana products that "they did not understand and did not want".Holland was called to testify before the United States Senate Committee on Aging, saying "As insurance commissioner, I currently have greater authority to address a consumer's problem with pet insurance than I do protecting the half a million Oklahoma senior citizens covered under a Medicare Prescription Drug or Advantage plan".