NxStage® to Report Fourth Quarter and Full Year 2011 Financial Results

NxStage Medical, Inc. (Nasdaq: NXTM), a leading manufacturer of innovative dialysis products, today announced plans to release its financial results for the fourth quarter and full year ended December 31, 2011 on Wednesday, February 29, 2012  before the opening of the financial markets.

NxStage will also host a conference call at 9:00 a.m. Eastern Time on Wednesday, February 29, 2012 to discuss its fourth quarter and year-end 2011 financial results.

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 February 29, 2012. 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 year-end and other factors that are discussed in NxStage’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2011 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.