Gary Douglas Hammer, MD

Gary Douglas Hammer, MD, PhD

Specialty: Endocrinology, Internal Medicine
Title: Professor
4.8/5
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Gary Douglas Hammer, MD, PhD
Endocrinology
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  • About

    Gary D. Hammer, M.D., Ph.D. is Professor in Departments of Internal Medicine (MEND), Cell & Developmental Biology, and Molecular & Integrative Physiology. He currently serves as Director of Endocrine Oncology Program in Rogel Cancer Center where he holds the Millie Schembechler Professorship in Adrenal Cancer. He is past Director of Center for Organogenesis: Stem Cells & Regenerative Medicine. He has brokered the recent renaissance of the current Michigan team of adrenal scientists that includes a who’s who in the study of adrenal disease.

    He received the UofM Jerome Conn Award for Outstanding Research in Internal Medicine, the Endocrine Society Edwin B. Astwood Award for Outstanding Research and is a member of ASCI and AAP. He has served in numerous leadership roles at UofM and in the public and private sectors including recent tenure on Board of Scientific Advisors for NCI. He is the editor of four textbooks including Pathophysiology of Disease: An Introduction to Clinical Medicine (McGraw Hilll), and the upcoming Adrenal Section Editor for Degroot’s Endocrinology (Elsevier). He has served in numerous capacities for the world’s largest endocrine organization, the Endocrine Society including his most recent role as President of the Society (2020-2021). An Advisor to the Congressional H.E.L.P. committee - he co-authored the 21st Century Cancer ALERT (Access to Life-Saving Early detection, Research and Treatment) introduced in Congress in 2009. He has been catalyst for the formation of two international cooperative groups, most recently the A5 (American Australian Asian Adrenal Alliance) that leverages collaboration to secure projects from Pharma and funding agencies across the spectrum of adrenal diseases. He is a cofounder of two companies - MILLENDO and SLING THERAPEUTICS that focus on rare endocrine diseases.

    Areas of Practice

    Endocrine oncology, Adrenal cancer, adrenal neoplasia

    Locations

    • Endocrine Oncology Clinic | Rogel Cancer Center 1500 E Medical Center Dr
      Floor B1 Reception A
      Ann Arbor, MI 48109-5911
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    Insurance Accepted

    University of Michigan Health participates with most health insurance plans.

    See our insurance details

    Education & Training

    Medical School or Training

    Tufts University School of Medicine, 1992

    Residency

    University of California, San Francisco, Internal Medicine, 1994

    Fellowships

    University of California, San Francisco, Endocrinology & Metabolism, 1997

    Board Certifications

    Endocrinology, Diabetes & Metabolism

    Professional Organizations

    Endocrine Society
    American Australian Asian Adrenal Alliance

    Research Overview

    Research projects in his own laboratory are aimed at elucidating the mechanisms by which growth factor signaling and transcriptional programs initiate adrenal-specific growth and differentiation with an emphasis on dysregulated adrenocortical stem cells in development and cancer. He is a cofounder of two companies - MILLENDO and SLING THERAPEUTICS that focus on rare endocrine diseases. Collaborative work with colleagues has led to the development of new national and international therapeutic trials with biological-based therapies for adrenal cancer that target the molecular defects in endocrine disease while sparing normal tissue.

    Links

    Center for Cell Plasticity & Organ Design

    Metabolism, Endocrinology & Diabetes - Division of Metabolism, Endocrinology & …

    Adrenal Cancer

    Endocrine Cancers - Rogel Cancer Center

    Patient Ratings & Comments

    Visit our Physician Ratings & Comments page to learn more about how patient ratings are collected, calculated, and updated to help you make an informed decision when choosing the right physician for your care.

    Patient Ratings

    40 Patient Ratings

    Patient Comments

    September 11, 2025 - "I travel from [...] to see Dr. Hammer. I am absolutely grateful for his care, his compassion and his expertise. He is an outstanding physician."

    August 7, 2025 - "Dr Hammer explained my case was discussed with a team of doctors to arrive at the recommended plan of treatment. He answered all our questions and explained the options well. He gave his recommendations and reasons why and we agreed."

    May 23, 2025 - "Dr. Gary Hammer saved my life. I would not be here without him and [...] and their OUTSTANDING care"

    March 26, 2025 - "[...] Dr. Hammer and [...] were so knowledgeable and patient with answering my questions and concerns. They spent a good amount of time with me that I left feeling I made the right decisions for my health care. I would highly recommend [...]"