1. Medicare's oversight of ambulatory surgery centers: a data brief Publication: [Washington, D.C.] : U.S. Department of Health and Human Services, Office of Inspector General, September 2019 Subject(s): Ambulatory Care Facilities -- standardsCredentialingGovernment RegulationMedicareSurgicenters -- standardsCertificationInfection ControlLicensureState GovernmentHumansUnited StatesCenters for Medicare & Medicaid Services (U.S.)