The Department of Justice (DOJ) and the Department of Health and Human Services announced the recovery of $2.6 billion in taxpayer dollars in 2017. According to the DOJ's recent report, many of these recoveries arose from false claims, fraudulent billing for ambulance transportation services, misrepresentations by EHR providers, and fraudulent billing for physical and occupational therapy services.
Read more here: https://www.justice.gov/opa/pr/department-justice-and-health-and-human-services-return-26-billion-taxpayer-savings-efforts.