The National Health Care Anti-Fraud Association, an organization of about 100 private insurers and public agencies, estimates that some $60 billion (about 3% of total annual health care spending) is lost to fraud every year, but that figure is considered conservative. In 2008, government-wide "improper payments" cost the U.S. Treasury $72 billion, or about 4% of total outlays for the related programs. Of that amount, 50% took the form of reimbursements to providers, medical suppliers, and other Medicare and Medicaid vendors. Medicaid had an estimated improper-payment rate of 10.5%, or $18.6 billion, for the federal share of Medicaid expenditures — the highest rate of any federal program.
Improper payments have been a "long standing, widespread, and significant problem" for the federal government, but Congress has not always been willing to appropriate the monies that the executive branch seeks for antifraud activities. In 4 of the past 5 years, Congress rejected Bush administration requests to provide an additional $579 million to combat health care fraud on the grounds that doing so would reduce budgets for curing cancer and combating obesity. Virtually no academic researchers study health care–related fraud activities, largely because — as Malcolm Sparrow, a Harvard professor of the practice of public management, testified recently — it "falls awkwardly between the traditional disciplines of health economics, health policy, crime control policy, anomaly detection and pattern recognition."