Yawkey Center building dedicated Officials dedicated the Yawkey Center for Outpatient Care, a 10-story, 400,000-square-foot addition to Massachusetts General Hospital that opened Tuesday with 1,200 patients being seen on the first day. The \$219 million glass and steel building on Cambridge Street, with underground parking for 725 cars, is the largest ambulatory care facility in New England. The project began more than two years ...