CAMBRIDGE, Mass.--(BUSINESS WIRE)--Biogen Idec Inc. (NASDAQ:BIIB) announced today that its presentation at the Thomas Weisel Partners Healthcare Conference will be webcast live via the internet, on Thursday, September 10, 2009 at 9:10 a.m. ET. To access the live webcast, please visit Biogen Idec’s Investor Relations section (investor.biogenidec.com). An archived version of the webcast will be available for 14 days following the presentation.