What is the significance of the Joint Commission's Core Measures to a CDI program? What is the difference between Utilization Review and Utilization Management? What is the significance of Recovery Audit Contractors (RACs)? Explain the Two Midnight Rule. What is the significance of local coverage determinations (LCDs) and national coverage determination (NCDs)? What is the significance of Quality Improvement Organizations? Explain the OIG Work plan. What would a CDI specialist want to know about Comprehensive Error Rate Testing (CERT)? What would a CDI specialist want to know about Medicare Provider Analysis and Review (MEDPAR) database system