Astronaut which develops a Veterans Affairs (VA) VistA Electronic Health Record (EHR) distribution writes:

Astronaut has released Astronaut-CPRS with vCardDAV demographics support. The new client allows drag and drop patient demographic registration as well as vCardDAV export of patient demographic information. Patients can send their information from a smartphone or email for quick and easy registration. Astronaut will lead an effort to make this interoperability industry-wide across, scheduling, billing, ordering portals and more. Complete article here: Newsletter registration here.