NxStage Medical is a leading medical technology company that develops, manufactures and markets innovative products for the treatment of end-stage renal disease (ESRD) and acute kidney failure. Its primary product is a portable hemodialysis system, which is used primarily for home hemodialysis and a range of dialysis therapies to deliver in the home setting. It distributors to hospitals and dialysis centers in the United States and internationally. NxStage is headquartered in Lawrence, Massachusetts, USA.