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Brian Yun, MD

Brian Yun, MD

Medical doctor turned engineer, CEO at Endo Health

San Francisco, California
Joined August 2025

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Summary

Brian Yun is a visionary entrepreneur dedicated to leveraging technology, particularly AI, to solve significant healthcare challenges. His core mission is to 'advance human lifespan by one year' by combining the deep impact of medicine with the scalability of software, a philosophy shaped by his experiences as both a medical doctor and a software engineer. brianyunmd+2
With a unique background spanning medicine, engineering, and product leadership, Brian has a proven track record of founding and scaling ventures. From co-founding a water purification startup at age 16 to launching a viral text-based RPG at Krafton and leading AI product development at thingsflow, he demonstrates a blend of technical prowess, strategic thinking, and entrepreneurial drive. a16z+1
Brian is recognized for his leadership and ability to 'create followership,' even as a young leader managing experienced teams. He achieves this through competence, delivering measurable impact (e.g., 5x conversion rate increase at thingsflow), actively supporting his team, and maintaining a high level of dedication and optimism. brianyunmd
His expertise and accomplishments have earned him an O-1 extraordinary ability visa, a testament to his significant contributions and influence in his fields. extraordinary+1

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