Founders
Les Young, M.D. and Vinh Nguyen, M.D. co-founded Immunization Record One in 2026.
Les Young, M.D.
Dr. Les Young is a UCLA-trained pediatrician based in California with more than two decades of experience caring for children and promoting community health.
A computer programmer since 1987, he has a longstanding passion in applying technology to improve the lives of others. He is also an Epic superuser who has trained hundreds of physicians to use electronic health records more efficiently.
As a father and pediatrician, Dr. Young is dedicated to protecting children through immunization. He authored The Everything Parent’s Guide to Vaccines, published by Adams Media in 2009, offering fact-based guidance on childhood immunization.
Combining clinical expertise, coding experience, and physician training, Dr. Young brings a multidisciplinary perspective to healthcare innovation and technology-driven solutions that enhance lives.
Vinh Nguyen, M.D.
As an Epic superuser and Chief Medical Informatics Officer at MemorialCare Medical Group, Dr. Nguyen brings decades of experience helping physicians optimize their clinical practice through the effective use of electronic health records. He has extensive expertise in clinical informatics, physician workflow, and the practical application of technology to improve efficiency, communication, and patient care.
Dr. Nguyen has also been recognized as a leader in healthcare technology and innovation. He was invited to serve as a keynote speaker at an Epic conference, where he shared his insights on the evolving role of technology in healthcare and the future of digital health. His combination of clinical experience, informatics expertise, and firsthand understanding of physician workflows provides a unique perspective on how technology can transform healthcare delivery.
The Team
Our mission would be impossible without our team of dedicated specialists who share our passion for children’s health.
Ken Takata
Ken Takata is a founding member of Immunization Record One, bringing decades of leadership in education, mentorship, and community service. Throughout his career, he has served as a teacher, master teacher, coach, and administrator, dedicated to helping individuals and diverse communities thrive.
With advanced degrees in Educational Administration and Education, Ken has been recognized for his contributions to education at the state, regional, and national levels, including honors from the California Department of Education and the California Teachers Association. He was also the first National Board Certified Teacher in his school district.
Ken extends his commitment to service through his leadership with the American Red Cross, serving in Disaster Cycle Services and Service to the Armed Forces. As a Disaster Action Team Coordinator, he has helped families navigate the aftermath of fires and other emergencies, including the loss of important personal documents.
His lifelong experience in education, leadership, and humanitarian service brings a valuable community perspective to IRO and its vision of using technology to make essential information more secure and accessible when families need it most.
Eulshik Hong
Description
Dayensi Cano
Having supported Dr. Les Young for years at MemorialCare, Dayensi brings a deep understanding of his clinical practice, workflow, and working style. Her experience in pediatric healthcare, combined with her firsthand knowledge of the day-to-day demands of a busy medical practice, allows her to anticipate needs, identify practical solutions, and help keep complex projects moving forward.
Dayensi plays an important role in helping Dr. Young manage the many responsibilities associated with his clinical, technology, and community initiatives. Her organizational skills, clinical insight, and familiarity with healthcare operations enable Dr. Young to focus on strategic priorities while relying on Dayensi to help coordinate schedules, manage details, and turn ideas into action.
Her ability to understand both the clinical and operational sides of his work makes her a valuable partner in tackling ambitious goals and managing an increasingly complex schedule.