On the heels of a recent Senate Finance Committee hearing focused on improper Medicare, Medicaid, and earned income payments, the GAO released a report concluding that improper governmental payments—defined by federal statute as payments that should not have been made or were in the incorrect amount—increased from $105 billion in 2013 to $124.7 billion in 2014 (http://1.usa.gov/1FO3U7B). Medicare accounted for 48% of those improper payments and Medicaid accounted for 14% of improper payments, which include payments to ineligible recipients, payments for goods or services not covered under these programs, and duplicate payments.
Jacob JA. Senate Examines Improper Medicare and Medicaid Payments. JAMA. 2015;314(18):1906. doi:10.1001/jama.2015.15027