Health Services Advisory Group, Inc. (HSAG) is both a diversified Arizona-based quality innovation network-quality improvement organization (QIN-QIO) and an external quality review organization (EQRO). It was founded in 1979 by a group of medical professionals whose goal was to make a difference in health care quality improvement. As a QIO, HSAG works to improve the effectiveness, efficiency, economy, and quality of services delivered to Medicare beneficiaries. As an EQRO, HSAG conducts health plan-specific reviews of quality of care, timeliness, and access to services provided to beneficiaries in managed care, behavioral health, and prepaid inpatient health plans for Medicaid programs across the country. There is a QIN-QIO representing each state within a QIN region. HSAG is the QIN-QIO for Arizona and California. At its headquarters in Arizona, HSAG has three divisions: the Federal Division, responsible for Medicare work under a federal contract; the State & Corporate Services Division, responsible for Medicaid quality review work; and the Survey, Research & Analysis Division, which offers outcomes measurement, satisfaction surveys, and quality improvement interventions. It is HSAG’s mission to be a positive force in health care by providing helpful information and quality expertise to those who deliver and those who receive health services.