In the September/October issue of Physician Executive, the Remote Practice Network (RPN) health care delivery system concept was introduced and explained. In this article, the concept is illustrated by a description of Arizona HealthSource (AHS), an RPN developed in Phoenix, Arizona. AHS's design, evolution, and operation demonstrate both the competitive pressures that force hospitals into taking new initiatives and the exciting alternative offered by an RPN. Arizona HealthSource serves the Phoenix, Ariz., region, a highly competitive health care marketplace. The organization was started by St. Joseph's Hospital and Medical Center in cooperation with Magliaro & McHaney, a consulting firm with offices in Atlanta, Ga., and La Jolla, Calif. AHS is currently managed under contract by Magliaro & McHaney, which develop the RPN concept and which designs, implements, markets, and manages health care delivery system.