The Medicaid program helped provide health care to an estimated 73 million individuals in fiscal 2017 at a cost of about $596 billion. A report from the Government Accountability Office [GAO] focuses on the major risks to the integrity of Medicaid. Efforts needed to strengthen oversight include: expansion of a national Medicaid data system that will allow comparisons across states, a national anti-fraud strategy, and greater collaboration between state and federal auditors.
The report can be obtained at https://www.gao.gov/assets/700/692821.pdf.