Premier Medical Network, a preferred provider organization that contracts with hospitals and physicians to offer a managed health-care delivery system to Utah employers, had an 11.7 percent increase in enrollment in 1990.

Robert Immitt, PMN's executive director, said it had 41,790 people enrolled in the program, 4,403 more than the 1989 figure of 37,387.PMN has 20 employers and nine insurance contracts compared to 19 employer and nine insurance contracts in 1989.

Through its preferred arrangement with employers and insurers, PMN helps control direct health costs for employers who self insure and premium costs for companies that buy group health insurance plans, said Immitt.

The organization now has 11 hospitals in the network with Lake View Hospital in Bountiful, Castle View Hospital in Price, Mountain View Hospital in Payson and the Ashley Valley Medical Center in Vernal added to the list. Last year, 70 physicians joined the network, bringing the total to 500.

"Our organized health-care system is designed to work in conjunction with various types of employer health plans to reduce cost without reducing health benefits or without compromising quality. The growth we have experienced over the past year indicates to us the need for this type of health-care system in Utah," he said.