- National Kidney Foundation of Georgia
- National Kidney Foundation of Greater New York
- National Kidney Foundation of Hawaii
- National Kidney Foundation of Illinois, Inc.
- National Kidney Foundation of Kentucky
- National Kidney Foundation of KS and WMO
- National Kidney Foundation of Michigan
- National Kidney Foundation of Nebraska
- National Kidney Foundation of South and Central Texas
- National Kidney Foundation of the Virginias
- National Kidney Foundation of Utah
- National Kidney Foundation of Wisconsin
- National Kitchen and Bath Association
- National League for Nursing
- National Louis University
- National Marfan Foundation
- National Marrow Donor Program
- National Medical Association
- National Microrentals
- National Military Family Association
- National Mining Association
- National Minority Organ Tissue Transplant Education Program MOTTEP)
- National Newspaper Association
- National Optometric Association
- National Organization for Transplant Enlightenment N.O.T.E.)
- National Organization of Black County Officials
- National Park Medical Center
- National Park Service, MTC
- National Pawn Brokers Association
- National Pest Management Association
- National Pharmaceutical Association
- National Pharmacy Technician Association
- National Professional Group
- National Republican Legislators Association
- National Restaurant Association
- National Retail Federation
- National Roofing Contractors Association
- National Runaway Switchboard
- National Sales Network
- National Senior Citizens Law Center
- National Sheriffs' Association
- National Society of Black Engineers
- National Speakers Association
- National Stone Sand and Gravel Association
- National Strengths and Conditioning Association
- National Training Systems Association
- National Utility Contractors Association
- National-Oilwell Inc.
- Nationwide Children's Hospital
- Nationwide Health Plans