WorldVistA is a non-profit organization formed to extend and collaboratively improve the U.S. Department of Veterans Affairs (VA) VistA electronic health record (EHR) system for use by others around the world.  WorldVistA has a number of development efforts aimed at adding new software modules such as pediatrics, obstetrics, and other functions not used in the veterans' healthcare setting.

WorldVistA seeks to help those who choose to adopt the VistA system to successfully master, install, and maintain the software for their own use. WorldVistA will strive to guide VistA adopters and programmers towards developing a community based on principles of open, collaborative, peer review software development and dissemination.