PeopleofSuperintelligence

Researcher

Mark Musen

Also known as Mark A. Musen

Mark Musen is a Stanford biomedical informatician whose research spans artificial intelligence, knowledge systems, and biomedical data. He built the Protégé meta-tool for knowledge-based systems in 1987 and became principal investigator of Stanford’s National Center for Biomedical Ontology in 2005. Since 2014, he has led CEDAR’s work on biomedical metadata, and he served as principal investigator of the NIH RADx Data Hub from 2021 to 2026. In 2025, he received the American College of Medical Informatics Distinguished Fellow honor and the Knowledge Graph Conference Lifetime Achievement Award; in 2026, he led an NSF-funded collaboration to build AI-driven remote laboratories. As of October 2026, he is Stanford Medicine Professor of Computational Medicine and chief of the Division of Computational Medicine, and directs Stanford’s WHO Collaborating Center for Classification, Terminology, and Standards.

Born
1956
Works
954
Citations
30,959
h-index
81
Badges

Years link to their sources. Publication numbers from OpenAlex, as of 22 October 2026.

Timeline

  1. 1977–1988

    Biology and medical training

    He earns a biology degree from Brown in 1977 and an MD from Brown’s Alpert Medical School in 1980. At Stanford, he completes an internal-medicine residency in 1983 and a doctorate in Medical Information Sciences in 1988. He completes a medical-informatics postdoctoral fellowship at Erasmus University Rotterdam in 1988.

  2. 1987

    The Protégé meta-tool

    In 1987, he builds the Protégé meta-tool for knowledge-based systems; a Stanford team continues its development.

  3. 2005–2016

    An NIH ontology center

    In 2005, NIH awards Stanford $18.8 million to develop the National Center for Biomedical Ontology, with Musen as its principal investigator. The center aims to help researchers share, compare, and analyze biomedical data. From 2008 to 2016, he chairs the WHO’s Health Informatics and Modeling Topic Advisory Group for the ICD-11 revision.

  4. Since 2014

    CEDAR metadata systems

    Since 2014, he serves as principal investigator of Stanford’s Center for Expanded Data Annotation and Retrieval (CEDAR). In 2015, he and collaborators describe CEDAR’s work on comprehensive metadata that helps scientists discover, interpret, and reuse biomedical datasets.

  5. 2021–2026

    The RADx Data Hub

    From 2021 to 2026, he serves as principal investigator of the NIH RADx Data Hub. In 2023, NIH awards $10 million per year to his team to build a hub that gives researchers access to curated, de-identified COVID-19 data for search and analysis.

  6. 2025

    ACMI Fellow and KGC award

    In 2025, the American College of Medical Informatics names him a Distinguished Fellow, and the Knowledge Graph Conference gives him its Lifetime Achievement Award.

  7. August 2026

    A national AI lab network

    In August 2026, the National Science Foundation awards a $20 million grant to a collaboration he leads to build a national network of artificial intelligence-driven, remotely operated labs.

  8. As of October 2026

    Computational medicine at Stanford

    In December 2025, he is a professor of biomedical informatics research and director of Stanford’s Division of Computational Medicine. As of October 2026, he is Stanford Medicine Professor of Computational Medicine, Professor of Medicine (Computational Medicine) and of Biomedical Data Science, and chief of the division; he directs Stanford’s WHO Collaborating Center for Classification, Terminology, and Standards. His current research covers artificial intelligence, open science, data stewardship, intelligent systems, and biomedical decision support.

Career

  1. Since 2005Stanford UniversityPrincipal Investigator, Professor of Computational Medicine; Professor of Medicine (Computational Medicine); Professor of Biomedical Data Science
  2. 2008–2016World Health OrganizationChair
  3. Until 1988Erasmus University RotterdamPostdoctoral Fellow

Education

  1. 1988Stanford UniversityPhD
  2. 1980Brown UniversityMD
  3. 1977Brown UniversityBiology degree

From the biography and OpenAlex affiliations (the years of papers that list the organization), so some years are approximate.

Most-cited works

  1. The protégé project2015 · AI Matters · 1,414 citations
  2. Network Analysis of Intrinsic Functional Brain Connectivity in Alzheimer's Disease2008 · PLoS Computational Biology · 1,147 citations
  3. The evolution of Protégé: an environment for knowledge-based systems development2003 · International Journal of Human-Computer Studies · 1,138 citationsWith Natasha Noy
  4. PROMPT: Algorithm and Tool for Automated Ontology Merging and Alignment2000 · 954 citationsWith Natasha Noy
  5. Creating Semantic Web contents with Protege-20002001 · IEEE Intelligent Systems · 942 citationsWith Natasha Noy and Stefan Decker

From OpenAlex, as of 21 October 2026.

  1. 20% of people at companies who shape AI also hold a university role, led by Google and Stanford UniversityIncludes Stanford University. We estimate that 539 of the 6,766 people with a known current organization (8%) hold both a university role and a company role, including 20% of people at companies and 13% of people at universities.
  2. Google had the most people shaping AI every year from 2014 to 2025Includes Stanford University. Our estimates of which organizations employed the most people shaping AI each year from 1955 to 2025, tracing the shift from university labs to companies.
  3. More people shaping AI studied at Massachusetts Institute of Technology than at any other institutionIncludes Stanford University. We estimate where the people shaping AI studied and where their careers led. Massachusetts Institute of Technology leads with 467 former students, including 291 recorded doctorates.
  4. The company share of AI researchers’ top papers was 31% in 2020–2024 and 8% in 1970–1974Includes Stanford University. We estimate where the people shaping AI worked when their most-cited papers appeared: the company share was 31% in 2020–2024 and 8% in 1970–1974, and Google led all organizations in 2020–2024.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

Photo: We have no published photo of Mark Musen yet. Send us a free-licensed photo.

  1. Mark Musen - Wikipedia en.wikipedia.org. Checked 20 October 2026.
  2. Mark Musen's Profile | Stanford Profiles profiles.stanford.edu. Checked 20 October 2026.
  3. Protégé (software) - Wikipedia en.wikipedia.org. Checked 20 October 2026.
  4. NIH awards grant to Stanford to launch biomedical computation center med.stanford.edu. Checked 20 October 2026.
  5. The center for expanded data annotation and retrieval pmc.ncbi.nlm.nih.gov. Checked 20 October 2026.
  6. RADx Data Hub: A Scalable Solution for FAIR Data Sharing medicine.stanford.edu. Checked 20 October 2026.
  7. Thank You for a Wonderful Knowledge Graph Conference 2025! knowledgegraph.tech. Checked 20 October 2026.
  8. Stanford Medicine researchers awarded $20 million for AI-guided research facilities med.stanford.edu. Checked 20 October 2026.
  9. Constructing the Future of Health: Stanford's Division of Computational Medicine medicine.stanford.edu. Checked 20 October 2026.
  10. Division of Computational Medicine | Stanford Medicine computationalmedicine.stanford.edu. Checked 20 October 2026.