• Aetna Foundation
• Alliance Healthcare Foundation
• The California Endowment
• California HealthCare Foundation
• Colorado Trust
• The Commonwealth Fund
• David and Lucile Packard Foundation
• Delmarva Foundation
• The Flinn Foundation
• The Foundation Center
• Foundation for Accountability
• Foundation for Healthy Communities
• Georgia Medical Care Foundation
• Henry J. Kaiser Family Foundation
• Irvine Health Foundation
• John D. and Catherine T. MacArthur Foundation
• March of Dimes Birth Defects Foundation
• Marshfield Clinic Research Foundation
• Michael Reese Health Trust
• Milbank Memorial Fund
• Northeast Health Care Quality Foundation
• Pew Charitable Trusts
• Public Health Foundation
• The Robert Wood Johnson Foundation
• St. Luke's Health Initiatives
• Texas Medical Foundation
• Washington Health Foundation
• William T. Grant Foundation
• W.K. Kellogg Foundation