Cheshire, Conn, September 5, 2006 -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that Dr. Leonard Bell, Chief Executive Officer of Alexion Pharmaceuticals, will present at the Bear Stearns 19th Annual Healthcare Conference in New York City at 2:30 p.m. ET on Tuesday, September 12, 2006. An audio webcast of Dr. Bell's remarks will be available live. You can access the webcast at: www.alexionpharm.com. An archived version of the remarks will also be available through the Company's web site for a limited time following the conference.