This site visit featured a review of a unique Medicaid managed care system, the Arizona Health Care Cost Containment System (AHCCCS), which has operated as a research and demonstration waiver since its inception in 1982. Site visitors heard from speakers who provided historical and background information, a discussion of competitive bidding, contracting and performance management, and insights into the delivery of behavioral health under the mandatory AHCCCS program. The group also heard discussions about services to the uninsured and Arizona\u27s safety net providers. Other topics covered during the visit included the state\u27s KidsCare program under the State Child Health Insurance Program; AHCCCS quality, outreach, enrollment, and data systems; and the provision of pharmacy services to enrollees. Visits to providers, health plans, and state offices were included during the Arizona stay