595 Loyola Drive
Los Altos, CA 94024
Begun on January 1, 2006, this is now the world’s largest listing of health-related volunteering opportunities. Over 4,287 organizations report volunteering listings in virtually all medical (and some non-medical) fields in over 118 countries as of January 15, 2016. They have faciliated over seven million searches, helped make over 292,000 volunteer connections, and helped make over 191,000 patient connections. You can find many possibilities on their website and post your interests there. They have offices in seven other countries.