Our 21-month 'Craking the Code' investigation documented for the first time how some medical professionals have billed Medicare at sharply higher rates than their peers and collected billions of dollars of questionable fees as a result. The Center for Public Integrityhttp://www.publicintegrity.org/authors/center-public-integrityhttp://www.publicintegrity.org/2012/12/26/11980/best-2012-health-reporting