The Centers for Medicare & Medicaid Services (CMS) has published a user guide for the Medicare Code Editor (MCE), which detects and reports errors in coding claims data. The guide, effective through September 2008, contains a description of each coding edit with corresponding ICD-9-CM code lists.

The guide is available at http://www.cms.hhs.gov/AcuteInpatientPPS/downloads/ MCEonIPPSUserGuide.pdf.