The Centers for Medicare & Medicaid Services is developing a Web-based application, CROWNWeb, which is designed to facilitate the mandated entry and update of electronic data, and retrieve this data for dialysis facilities nationwide. Part III of this three-part series further explores the rationale behind CROWNWeb, discusses situations from the past where CROWNWeb could have benefited the renal community, and reviews how CROWNWeb can be used in CQI activities and to track and improve patient outcomes.