BALTIMORE — Medicare's RAC auditors have collected $313 million in overpayments from October 2009 (when the program was expanded nationally) through March 2011, according to a CMS report. More than half of that total, or $162 million, was collected in the first three months of this year, the report said.

In Regions C and D, the top overpayment issue was separate billing for bundled services for DMEPOS provided during an inpatient stay, CMS said.

The report is available at www.cms.gov/RAC/Downloads/FFSNewsletter.pdf.