I'm trying to find what CMS requires for NxStage water/dialysate/water analysis testing. If someone could give me some direction at a website. NxStage was no help.

See the Conditions of Coverage Interpretive Guidelines at http://www.nraa.org/Documents/SC-09-01_ESRDIGs1%201_memo.pdf

§ 494.40 Condition: Water and dialysate quality (V175-278) page 33