In 2019, Zeiger announced he would be joining Facebook as the Head of Health Strategy.

[1] Zeiger received his medical degree at Stanford University, including a master's degree in biomedical informatics and he did his residency at University of California, San Francisco (UCSF).

[3] He became interested in the application of technology in healthcare during his medical training, and noticing how difficult it was to find things in the medical records and how as time went on, the records got larger and more difficult to navigate.

[2][6][7] With Gilles Frydman, founder of the Association of Cancer Online Resources, Zeiger co-founded the Smart Patients project.

[8][9] The project is a search engine and social media platform which connects clinical trial participants in cancer studies to each other for personal conversations.