Questions about kidney disease? Call toll-free at 855.NKF.CARES (855.653.2273) or email nkfcares@kidney.org. The National Kidney Foundation is revolutionizing the fight to save lives by eliminating preventable kidney disease, accelerating innovation for the dignity of the patient experience, and dismantling structural inequities in kidney care, dialysis and transplantation. The NKF is ranked in the top 1% of socially responsible brands and meets the standards of the Wise Giving Alliance of the Better Business Bureau where 80% of every dollar raised goes directly to programs and services.  Also, the NKF has a 3-star rating by Charity Navigator.