Doctors concerned about the care of chronic kidney failure patients hope to meet this month with the chief medical officer of the Centers for Medicare & Medicaid Services to explore how it can be improved. In June, a group of leading nephrologists voiced concerns in a letter to Barry Straube, the top CMS doctor, and White House health policy czar Nancy-Ann DeParle. The letter urged "substantial changes in the delivery and financing of care . . . to improve patient outcomes."