Tens of thousands of Medicaid beneficiaries and scores of physicians and pharmacies have been involved in fraudulent or abusive prescribing of controlled substances, found the Government Accountability Office (GAO). The agency's report (http://www.gao.gov/new.items/d091004t.pdf) was presented at a September 30 hearing of the Senate Subcommittee on Federal Financial Management, Government Information, Federal Services, and International Security.
Mitka M. Fraud and Abuse. JAMA. 2009;302(18):1960. doi:10.1001/jama.2009.1592