Excerpt: Federal employees and retirees will be able to switch health plans during the annual open season, which begins Monday and runs through Dec. 9.... During the 2003 open season, employees can use OPM's FEHBP Web site to compare health plans. Features on the site allow employees to enter their zip codes and get a list of the health plans available in their areas. This year, four new insurance plans are joining the program, while 11 are dropping out ...