The Centers for Medicare & Medicaid Services implemented the Correct Coding Initiative on Jan. 1, 1996. The purpose of correct coding is to ensure claims are processed accurately following CPT and CMS guidelines. The National Correct Coding Initiative helps identify codes that should not be billed together by physicians performing the services on the same day. There are two type of edits that the NCCI includes: Comprehensive Component Edits and Mutually Exclusive Edits. There is also National Correct Coding Manual that is published on a quarterly basis containing all current data.