PHOENIXPhoenix Memorial Hospital said it will close its emergency room and convert to a campus that offers urgent care and other services such as long-term care and rehabilitation, effective June 1. The 159-bed hospital, owned by Vanguard Health Systems, Nashville, has about 25,000 ER visits per year. The new urgent-care center will be operated by Maricopa Integrated Health System, a 542-bed public hospital in Phoenix, and its affiliated physician group MedPro. The move comes as most Phoenix-area hospitals are expanding and hospital beds are at a premium. But Phoenix Memorial averages only 45 to 50 inpatients a day because physicians have preferred admitting patients to other hospitals such as Maricopa, according to Vanguard officials. Vanguard had closed Phoenix Memorials ER in 2002, just 14 months after acquiring the hospital from bankrupt PMH Health Resources but it reversed course a year later, reopening the ER under a partnership with MedPro.