HealthDataInsights (HDI), Inc. of Las Vegas, NV, the RAC selected by CMS to begin reviewing hospitals in Region D (initially Montana, Wyoming, North Dakota, South Dakota, Utah, and Arizona), had the most overpayment determinations of any RAC in the demonstration project with 239,205.
However, it also had the most overturned on appeals (11.5%), according to CMS numbers released here in September.


