The HHS Office of Inspector General (OIG) has issued a report on the Medicaid Statistical Information System (MSIS) that concludes that MSIS data -- the only source of nationwide Medicaid claims and beneficiary eligibility information -- were not timely, accurate, or comprehensive for fraud, waste, and abuse detection. The OIG notes opportunities to improve and expand Medicaid data collection and reporting to further assist in fraud, waste, and abuse detection.