Meet the Team
Our Leadership
Driven by a passion for innovating technologies that make a meaningful impact on unmet medical needs.

Andrew J. Ritter
Chief Executive Officer
Andrew J. Ritter

William Karnes, M.D.
Chief Medical Officer,
Co-Founder
William Karnes, MD

Peter Crosby
Executive Chairman

James Requa
Head of AI

Jason Samarasena, M.D.
GI Advisor,
Co-Founder
Our Story
Docbot was born from a mission to provide the most powerful AI-assisted image analysis solutions to revolutionize GI care. In 2013, co-founders Andrew Ninh, Tyler Dao, and Dr. William Karnes (leading gastroenterologist at University of California Irvine) teamed up to create a web interface for Dr. Karnes’ large polyp/colonoscopy quality database that he had painstakingly collected over a 10-year period.
Ninh’s background in bioinformatics and natural language processing led them to believe they could leverage the data to generate artificial intelligence algorithms to automate the detection of polyps and other lesions and report colonoscopy quality. The result was the UltivisionAI™ Platform. The team officially launched the company in 2016 and raised its Seed Round in 2019 through the prestigious Y Combinator accelerator program.
Our Board of Directors
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Peter Crosby
Former CEO of 6 medical device
companies in four countries
Executive Chairman
Andrew J. Ritter
Chief Executive Officer,
Docbot
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Will Borthwick
Principal, BOLD
Capital Partners
Alex Morgan M.D., Ph.D.
Partner, Khosla Ventures
Board Observer
Guy Vidra
Partner,
Collaborative Fund
Our Medical Advisors

Tyler Berzin, M.D.
Associate Professor of Medicine at Harvard Medical School and Director of the Advanced Endoscopy Fellowship Training Program at Beth Israel Deaconess Medical Center
Tyler Berzin

Seth Gross, M.D.
Clinical Chief of Gastroenterology and Hepatology at NYU Langone Health
Seth Gross

Stephen Hanauer, M.D.
Professor of Medicine-Gastroenterology and Hepatology at Northwestern Medical and Chair of the International Organization for Inflammatory Bowel Disease
Stephen B. Hanauer, MD, FACG

John Hong, M.D.
CEO and Founder of United Medical Doctors
John Hong, M.D.

David A. Johnson, M.D.
Professor of Medicine and Chief of Gastroenterology at the Eastern Virginia School of Medicine in Norfolk. Past President of the American College of Gastroenterology
David A. Johnson, M.D.

John Vargo, M.D.
Chief of Gastroenterology at Cleveland Clinic and past President of American Society for Gastrointestinal Endoscopy
John Vargo
Our Investors






Our Partners




