Meet the people behind Dr. B

Our mission is to make access to care, specifically the COVID vaccine, more efficient and more equitable.

The Team

Cyrus Massoumi
Cyrus MassoumiFounder
Dr. B is the brainchild of Cyrus Massoumi, an entrepreneur and investor whose mission to make access to healthcare more efficient and equitable. Cyrus is the founder and former CEO of ZocDoc and member of the Board of Advisors of Columbia University's Mailman School of Public Health. Cyrus is also the founder of humbition, a venture capital firm, and Shadow, the app that uses AI and the power of community to reunite lost pets with their families.
Ian Lipkin
Ian LipkinAdvisor
MD, Director of the Center for Infection and Immunity, NIH Center for Diagnostics and Discovery, and Center for Solutions for ME/CFS at Columbia University
Dr. Lipkin is an internationally recognized expert in pathogen discovery with over 30 years in diagnostics, microbial discovery, and outbreak response. In 2020, Dr. Lipkin created the C3 test, an ultra-sensitive COVID-19 test that can detect and quantify even low viral loads. Dr. Lipkin was in China studying the coronavirus outbreak while it was happening. In 2016 he received the country's top scientific honor for contributions during previous outbreaks.
Ahmet Nalcacioglu
Ahmet NalcaciogluEngineering
Ahmet Nalcacioglu is an experienced software engineer. Prior to joining Dr. B., he worked as a Principal Engineer at Haven, a healthcare startup. Before that, he built and ran a quantitative/systematic trading hedge fund. Ahmet received his MBA degree from New York University, MS degree in Computer Science from the University of Florida, and his B.Sc. in Computer Science from Bilkent University, Turkey.
Misha Kaletsky
Misha KaletskyEngineering
Misha Kaletsky is an experienced software engineering leader, specializing in using technology to solve complex problems in healthcare. Prior to joining the Dr. B team, Misha held positions at Haven, ZocDoc, and Microsoft. He received a BS in Mathematics from Oxford University and a MS in Computer Science from University College of London.
Jimmy Chion
Jimmy ChionProduct
Jimmy co-founded the site, also a COVID standby list, and merged forces with Dr. B in February to accelerate the shared mission. He was previously a Creative Technologist at the New York Times and Principal Designer at IDEO. Jimmy holds a BA in Psychology and MS in Mechanical Engineering, both from Stanford University.
Naoko Kudo
Naoko KudoOperations
Naoko Kudo is an operations expert with years of experience working for non-profit organizations and grassroots campaigns. Prior to joining Dr. B, Naoko was the Co-Founder and COO of Organizing Corps 2020, an organization dedicated to recruiting and training organizers for the 2020 presidential campaign. Naoko holds a BS in Economics from the Wharton School at the University of Pennsylvania.
Ashley Gazich
Ashley GazichPartnerships
Ashley Gazich excels in setting organizational vision, building strategic partnerships, and scaling operations. She is a leader within the C19 Coalition, an organization working to build an efficient PPE and medical device supply chain. Before jumping into the national COVID response, Ashley was a Lead Program Manager at Microsoft and a Senior Support Engineer at Xamarin. Ashley holds a BS degree in Mathematics from the University of Florida.

Medical advisors

Akili Hinson
MD, MBA, Founder & CEO of Juno Medical
Dr. Akili Hinson, MD is a general surgery specialist in NY and is the founder and CEO of Juno Medical. An entrepreneur, physician, and healthcare innovation expert, Akili holds a Bachelor of Art Degree in Economics from Georgetown University, a Doctor of Medicine from Weill Medical College of Cornell University, and a MBA in Finance and Healthcare Management from Columbia Business School.
Florian Otto
MD, PhD, Founder & CEO of Cedar
An entrepreneur and former physician, Florian Otto is the founder and CEO of Cedar, the healthcare financial platform. Prior to founding Cedar, Florian was an executive at ZocDoc. He holds an M.D., D.D.S. and PhD from the University of Freiburg, Germany.
Robin Berzin
MD, Founder & CEO of Parsley Health
Dr. Robin Berzin is the founder and CEO of Parsley Health, the national medical service closing the gap in the health care system for people with chronic illness through holistic care that drives better outcomes. A Summa Cum Laude graduate of the University of Pennsylvania, Robin completed medical school at Columbia University’s College of Physicians and Surgeons and trained in Internal Medicine at Mount Sinai Hospital in New York City.
Tom Lee
MD, MBA, Founder & CEO of Galileo, Founder & former CEO of One Medical
Tom Lee is a Harvard-trained internist and pioneering innovator in health care tech. Tom founded One Medical, the national leader in tech-enabled primary care. Tom also founded Galileo Health, a service re-imagining the relationship between patient and doctor, and Epocrates, the breakthrough medical reference app.
Toyin Ajayi
MD, Founder & Chief Health Office of Cityblock Health
Dr. Toyin Ajayi is Co-Founder and Chief Health Officer of Cityblock Health. Previously, she was Chief Medical Officer of Commonwealth Care Alliance, an integrated health plan and care-delivery system for individuals dually eligible for Medicare and Medicaid. Toyin holds degrees from Stanford University (BA, Human Biology) and the University of Cambridge (MPhil, Development Economics and International Development). She received her MD from King’s College London School of Medicine, is a board-certified Family Physician, and continues to practice primary care and hospital medicine.


Doug Hirsh
Founder & CEO of GoodRx
Doug Hirsch is a veteran technology entrepreneur well-versed in social media, healthcare, and entertainment web and mobile products. Doug’s broad experience includes working as one of the first 30 employees at Yahoo!, serving as the Vice President of Product at Facebook, and founding DailyStrength, the web’s largest community for people facing health and life challenges. He is the Founder and CEO of GoodRx, a company helping Americans get the healthcare they need at a price they can afford.
Leigh Shapiro
Head of Product and Operations, Shadow
Leigh Shapiro is the Head of Product & Operations at Shadow. She previously served as the Executive Director of Sector-based Workforce Development Training, in New York City’s Department of Small Business Services.
Lucy Lin
Design at Earnin
Lucy Lin is a product designer with a knack for research, process and facilitation. She gets excited about diving into “wicked” problems such as those in healthcare and financial systems which led her to Dr. B and Earnin. Lucy holds a BA in Psychology from the University of Southern California and an MA in Design Management Savannah College of Art and Design.
Lulu Cheng Meservey
Co-founder and President at TrailRunner International
Lulu Cheng Meservey’s background spans tech, finance, consulting and international relations. She is the Co-founder and President at the communications firm TrailRunner International and previously held roles at The World Bank, JPMorgan, and MIT Lincoln Laboratory. Lulu holds degrees from Yale University (BA, Political Science) and the Fletcher School at Tufts University (Masters, International Affairs).
Luke Bonney
Founder & CEO of Redox
Luke Bonney has more than a decade of experience working at the intersection of healthcare and technology. He is the Founder and CEO of Redox, which connects vendors and providers organizations to exchange healthcare data. He previously held roles at Epic and SilverKey Technologies. Luke holds a BS in Neuroscience and Behavior and Business from Cornell University.
Marija Ringwelski
Product at Ready Responders
Marija Ringwelski is a former venture-backed founder and a specialist in building products that improve people’s financial security and wellness. She currently works at Ready Responders in product management and holds a Bachelor of Science Degree in Nuclear Medical Technology from Manhattan College and a Master of Public Health from Columbia University Mailman School of Public Health.
Matthew Ng
Head of Technology at Shadow
Matthew Ng is a seasoned software engineer, currently holding the position of Head of Technology at Shadow. Prior, Matthew worked at Wildcard, Canary, and BlackRock. He holds a BS, Management and Computer Science and a MS in Computer Science from the Massachusetts Institute of Technology.
Travis Schmeisser
VP of Product & Design, Punch List
Travis Schmeisser is an expert in product design, founding companies such as Structure and First Principle, LLC and holding executive positions at Square and Flight Labs, amongst others.
Weina Chen
User Interface & User Experience
Weina Chen is a software engineer with a bioengineering background working at the intersection of healthcare, life sciences, and technology. She focuses on creating user interfaces for biological sciences and healthcare applications. Weina holds a BS in Bioengineering and Biomedical Engineering, Electrical Engineering and Computer Science and a MS in Translational Medicine, both from the University of California, Berkeley.