Why did Centers for Medicare and Medicaid services(CMS) implement National Correct Coding Initiative 1996?

Check the part under Background.

http://74.125.45.132/search?q=cache:J-wyPLizJ1YJ:www.oig.hhs.gov/oei/reports/oei-03-02-00770.pdf+National+Correct+Coding+Initiative+1996&hl=en&ct=clnk&cd=1&gl=us&ie=UTF-8