On May 4 and 5, 2009, CMS is hosting two information sessions on the RAC program, under which four designated contractors will review all Medicare paid claims to identify Medicare overpayments and underpayments. The RACs will be paid a contingency fee based on overpayments and underpayments they find. The upcoming sessions will take place at the CMS San Francisco Regional Office and will feature the RAC for California, HealthDataInsights, Inc.   Registration is required.