Ambulatory patient groups and redefining the roles of health care providers' delivery services in the USA.

Provides a review and analysis of the ambulatory patient groups classification system. Discusses a review of the history, development and implementation process. Concludes that in the ongoing efforts to move towards full-managed care in the not-so-distant future, ambulatory patients groups are another potential cost-cutting remedy for current health care providers and that future research into this issue is a must for public policy makers.