The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), part of the National Institutes of Health, conducts and supports research on many of the most serious diseases affecting public health, particularly the diseases of internal medicine.

NIDDK sponsors the National Kidney and Urologic Diseases Information Clearinghouse (NKUDIC), which provides information about diseases of the kidneys and urologic system to people with these diseases and their families, health professionals, and the public.