Company leader
Nate Gross
Co-founder
Doximity
Nate Gross is a co-founder of Doximity, the network physicians use to reach colleagues and to call patients, and a co-founder of Rock Health, a fund and research group for digital health startups. A medical student who taught himself to code to fix small annoyances at a hospital in Atlanta, Georgia, he left medicine before residency to build companies for doctors.
Fixing Small Problems in Medical School
He earned a bachelor's degree in government from Claremont McKenna College and then an MD from Emory University School of Medicine. Training at Grady Memorial Hospital, he ran into basic inefficiencies, such as logging in to online medical journals, and started building simple technical fixes with what he called "a mediocre programming ability."
Starting Doximity at Harvard Business School
He took leave near the end of medical school for an MBA at Harvard Business School, and in those years he met Jeff Tangney, co-founder of Epocrates. With Tangney and Shari Buck he co-founded Doximity, which launched in 2010 and opened to physicians in 2011. Clinicians use it to read medical news, to place a call that shows the office number, and to hold a video visit from a phone.
The first plan, secure texting between hospitals, ran into doctors' habits, so Doximity added mobile faxing as a bridge. "It takes 17 years for medical knowledge to disseminate across the country," he said in 2012.
Co-founding Rock Health
He also co-founded Rock Health, which backed and advised early digital health teams in the Bay Area. "But odds are if you have an idea, 30 other people have the same idea. You have to out-execute," he advised founders.
Moving to OpenAI
In 2025 he became head of health at OpenAI, and he is affiliated faculty for the clinical informatics fellowship in Stanford's RAISE Health program.
Outside work he cooks cream puffs and has worn costumes to midnight movie premieres.