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Mark Michalski

InvestorFounder

Chief Executive Officer at Aegis Ventures · Founder at Ascertain

New York, New York, United States

FoundedAscertain

Find your path to Mark

733 people in our graph share verified history with Mark — schools, employers, funds. One of them is your warm intro.

Wesley ChanunlockedMark: together at Google (2008)
Mark: together at Harvard Medical School
×4Mark: together at Google
Mark: together at World Health Organization

About

Mark Michalski is a board-certified radiologist working at the intersection of artificial intelligence and healthcare, with over two decades of experience across healthcare, technology, and executive roles. He currently serves as CEO of Ascertain and as Chief Information Officer at Deerfield Management, and previously held leadership positions at AWS (heading Healthcare & Life Sciences AI/ML business development), the Center for Clinical Data Science at Mass General Brigham, Butterfly Network, and Hyperfine Research, along with earlier roles at Google and Genentech. He completed his radiology residency at Yale-New Haven Hospital, earned a Bachelor's in Cybernetics from UCLA, and received his M.D. from Stanford University School of Medicine.

Invests in

AI & Machine LearningDigital HealthHealthtechMedical Devices

Founder at Ascertain

Intro paths

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In turn, Mark can intro founders to Ascertain's investors below.

Ascertain's investors · 2

Aegis VenturesNew YorkDeerfield Management CompanyNew York · since 2025

Experience

  1. Deerfield ManagementHead of Deerfield Intelligence, Chief Information Officercurrent2025 — present
  2. AscertainChief Executive Officercurrent2023 — present
  3. OptainChairman of the Board2023 — 2025
  4. AmazonWorldwide Healthcare & Life Sciences AI/ML2021 — 2023
  5. Headland Strategy GroupAI/ML and Data Science Practice Lead2020 — 2021
  6. Harvard Medical SchoolFaculty2016 — 2019
  7. Mass General Brigham AIExecutive Director2016 — 2019
  8. Hyperfine Research, Inc.Chief Medical Officer2014 — 2016
  9. Butterfly Network, Inc.President and Chief Medical Officer2013 — 2016
  10. Yale New Haven HospitalRadiology Resident2011 — 2015New York City Metropolitan Area
  11. St. Mary's Medical Center, San FranciscoMedical Intern2010 — 2011San Francisco Bay Area
  12. GenentechPortfolio and Pipeline Planning2009 — 2010San Francisco Bay Area
  13. GoogleConsultant, Life Sciences2008San Francisco Bay Area
  14. Asper BiogeneIntern2005Tartu, Estonia
  15. World Health OrganizationIntern2004Geneva, Geneva, Switzerland

Skills & more

Clinical Research61Medicine48Healthcare50Research20Medical Education18Lifesciences16Cancer14Public Health12Genetics13Molecular Biology9Healthcare Information Technology12Hospitals6
+12 moreMedical DevicesMedical ImagingLeadershipBiotechnologyClinical TrialsData AnalysisEpidemiologyHealthcare Information Technology (HIT)Healthcare ManagementInternal MedicineLife SciencesNeuroscience
  • Board Certification — American Board of Radiology
  • Medical License — New York State

From Mark's professional profile.

Colleagues at Aegis Ventures

Andrew Ettinger
Chief Executive Officer, Hume AI at Aegis Ventures
Ash Zenooz
Venture Partner at Aegis Ventures
Becca LaFond
Chief Partnerships Officer at Aegis Ventures
Becky James
Chief Operating Officer, Caregentic at Aegis Ventures
Bella De Wit
Manager, Executive Office at Aegis Ventures
Bill Schoenfeld
Co-Founder, Chairman at Aegis Ventures
Bunny Ellerin
Chief Ecosystem Officer at Aegis Ventures
Caroline Schell
Director, Events & Community at Aegis Ventures

Frequently asked questions

Who is Mark Michalski?
Mark Michalski is a board-certified radiologist working at the intersection of artificial intelligence and healthcare, with over two decades of experience across healthcare, technology, and executive roles. He currently serves as CEO of Ascertain and as Chief Information Officer at Deerfield Management, and previously held leadership positions at AWS (heading Healthcare & Life Sciences AI/ML business development), the Center for Clinical Data Science at Mass General Brigham, Butterfly Network, and Hyperfine Research, along with earlier roles at Google and Genentech. He completed his radiology residency at Yale-New Haven Hospital, earned a Bachelor's in Cybernetics from UCLA, and received his M.D. from Stanford University School of Medicine.
Where does Mark Michalski work?
Mark Michalski is Founder of Ascertain and Chief Executive Officer at Aegis Ventures.
What does Mark Michalski invest in?
Mark Michalski invests in AI & Machine Learning, Digital Health, Healthtech, Medical Devices.
What companies did Mark Michalski found?
Mark Michalski founded Ascertain.
Where did Mark Michalski go to school?
Mark Michalski studied at Stanford University School of Medicine (MD); Yale School of Medicine (Doctor of Philosophy - PhD, Investigative Medicine (Computer Vision)); UCLA (B.S., Cybernetics).

Founder mafias

Hyperfine Research mafia2

Also came through, then founded or led a company.

Jonathan RothbergFounderFounded Raindance Technologies +3

Same school

Shared employers