Headquartered in Nashville.
Rooted in deep medical AI expertise.
Yeji X helps value-based organizations surface the patients heading toward an avoidable cost event, then recommends the intervention most likely to improve outcomes and lower the cost of their care.
Yeji X serves independent value-based organizations carrying two-sided risk
Yeji X is built for independent, physician-led value-based organizations. These organizations carry real downside risk, run on a patchwork of systems that were never designed to talk to each other, and are judged on the cost of populations that don't sit inside any single record. That's the problem Yeji X was built to solve.
Prediction and intervention, in one recommendation
Most prediction tools read claims data and stop there. Others ask value-based organizations to build their own AI models. Both leave the next move to a care manager who's already stretched thin.
Proactive intervention has always been capped by how many care managers you can staff. Yeji X is the AI layer that reads each patient's EHR, imaging, and claims data together and delivers a ranked worklist with the next best intervention.
By putting the right patient, the right intervention, and the right timing in front of care managers, Yeji X extends the reach of the team you already have.
The science behind Yeji X
Medical AI research is led by a small number of groups worldwide, and several are based in Korea. Yeji X is advised by leaders from Seoul National University Hospital, KAIST, and the Korean Society of Artificial Intelligence in Medicine. That research bench is what Yeji X is built on.
US healthcare is its own discipline. ACO economics, two-sided risk, and care manager workflows are unique to the US. That's why Yeji X is based in Nashville. Andrew Rittler leads US go-to-market, and Yeji X is advised by leaders at Vanderbilt University Medical Center.
Yeji X Leadership
David Jung
CEO & Founder
David founded and leads Yeji X. As CEO of Promedius (Series B), he led the company's pivot and commercialization, and before that he led business development at Lunit, one of the world's leading medical AI companies, through its KOSDAQ IPO. At Yeji X, he drives the company's AI strategy and product vision.
Andrew Rittler
Head of Business Development
Andrew Rittler brings four decades of healthcare leadership spanning the industry's most significant transformations—from prospective payment and HIPAA to electronic health records (EHRs), consumer health technology, interoperability, the 21st Century Cures Act, and today's AI-enabled value-based care.
The Team Behind Yeji X
Yeji X brings together experts in clinical research, artificial intelligence, technology, strategy, data science, software engineering, and healthcare operations to build AI-native intervention for value-based care.
Co-founders
Seungjun Ryu
Co-founder, Principal Scientific Strategist
Lucas Lim
Co-founder, Head of Tech Strategy
Jiyoung Choi
Co-founder, Head of Operations
Research & Development
Jackson Moon
Head of Research
Danny Kim
AI Researcher
Jayden Kim
AI Researcher
James Heo
Product Development
Strategic & Scientific Advisory Board
Yeji X is advised by a board of leaders across medical AI, value-based care, and healthcare innovation.
Kevin W. Sexton, MD
Professor and Vice Chair for Innovation, Vanderbilt University Medical Center
Edward Choi, PhD.
Professor, KAIST
Chang-Min Park, MD
Professor and Radiologist, Seoul National University Hospital; Chair, Korean Society of Artificial Intelligence in Medicine
Han-Mo Yang, MD
Professor and Cardiologist, Seoul National University Hospital
Investors
See your population clearly.
Act on each patient confidently.
Yeji X reads each patient's EHR, imaging, and claims data together, surfaces the patients closest to an avoidable cost event, and recommends the next best intervention for each.
We're partnering with a small number of value-based organizations — including independent ACOs in REACH and LEAD — to prove what it can do.
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