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


William Karnes, M.D.

Chief Medical Officer,

Peter Crosby is Executive Chairman for Dobot

Peter Crosby

Executive Chairman


James Requa

Head of AI


Jason Samarasena, M.D.

GI Advisor,

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,

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Will Borthwick

Principal, BOLD
Capital Partners

Alex Morgan M.D., Ph.D.

Partner, Khosla Ventures
Board Observer

Guy Vidra

Collaborative Fund

Our Medical Advisors

Tyler Berzin@2x

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


Seth Gross, M.D.

Clinical Chief of Gastroenterology and Hepatology at NYU Langone Health

Stephen Hanauer3@2x

Stephen Hanauer, M.D.

Professor of Medicine-Gastroenterology and Hepatology at Northwestern Medical and Chair of the International Organization for Inflammatory Bowel Disease


John Hong, M.D.

CEO and Founder of United Medical Doctors


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

John Vargo1@2x

John Vargo, M.D.

Chief of Gastroenterology at Cleveland Clinic and past President of American Society for Gastrointestinal Endoscopy

Our Investors

Our Partners

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