NxStage® to Report First Quarter Fiscal 2011 Financial Results

LAWRENCE, Mass., April 12, 2011 /PRNewswire/ -- NxStage Medical, Inc. (Nasdaq: NXTM), a leading manufacturer of innovative dialysis products, today announced plans to release its financial results for the first quarter ended March 31, 2011 on Wednesday, May 4, 2011 before the opening of the financial markets.

NxStage will also host a conference call at 9:00 a.m. Eastern Time on Wednesday, May 4, 2011 to discuss its first quarter financial results. To listen to the conference call, please dial 800-510-0178 (domestic) or 617-614-3450 (international).  The passcode is 58429978.  The call will also be webcast LIVE and can be accessed via the investor relations section of the Company's website at www.nxstage.com/ir.cfm.

A replay of the conference call will be available 2 hours after the conclusion of the call through May 11, 2011.  To access the replay dial 888-286-8010 (domestic) or 617-801-6888 (international) and enter passcode 63417748.  An online archive of the conference call can be accessed via the investor relations section of the Company's website at www.nxstage.com/ir.cfm.

About NxStage

NxStage Medical, Inc. (Nasdaq: NXTM) 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 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. The forward-looking statements in this release include NxStage's plan to release its financial results on May 4, 2011. Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors including, but not limited to, unexpected difficulty in closing the company's financial books for the quarter and other factors that are discussed in NxStage's Annual Report on Form 10-K for the year ended December 31, 2010 filed with the SEC. NxStage is under no obligation to (and expressly disclaims any such obligation to) update or alter its forward-looking statements, whether as a result of new information, future events or otherwise.

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

SOURCE NxStage Medical, Inc.