NxStage to Present at the William Blair Growth Stock Conference

Thursday June 4, 2009

LAWRENCE, Mass., June 4 /PRNewswire-FirstCall/ — NxStage Medical, Inc. (Nasdaq: NXTM – News), a leading manufacturer of innovative dialysis products, today announced that Jeffrey H. Burbank, Chief Executive Officer, will be presenting at the William Blair Growth Stock Conference on Tuesday, June 9, 2009 at The Four Seasons Hotel in Chicago, IL.

NxStage’s investor presentation is scheduled for Tuesday, June 9th at 4:30 p.m. (CST). To listen to the audio webcast of the presentation during the event, please visit: http://www.nxstage.com and click on ‘Investor Information’.

About NxStage Medical

NxStage Medical, Inc. (Nasdaq: NXTM – News) is a medical device company, headquartered in Lawrence, Massachusetts, USA, that develops, manufactures and markets innovative products for the treatment of end-stage renal disease, or ESRD, and acute kidney failure. For more information on NxStage and its products, please visit the company’s website at http://www.nxstage.com.

Forward-Looking Statements

This release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this release that are not clearly historical in nature are forward-looking, and the words anticipate, believe, expect, estimate, plan, and similar expressions are generally intended to identify forward-looking statements. Examples of these forward-looking statements include statements as to Mr. Burbank’s plans to present at this conference. NxStage specifically disclaims any obligation to update these forward-looking statements. These forward-looking statements should not be relied upon as representing NxStage’s expectations or beliefs as of any date subsequent to the date of this press release.

Contact:
Kristen K. Sheppard, Esq.
Investor Relations
ksheppard@nxstage.com
9783325923