Chair, Department of Internal Medicine

John M. Carethers, MD, MACP
C. Richard Boland Distinguished University Professor
John G. Searle Professor and Chair, Internal Medicine
Professor, Human Genetics
Dr. John M. Carethers received his BS degree in Biological Sciences with a minor in Chemistry from Wayne State University, and his MD with high distinction from the same institution. Dr. Carethers did his internship and residency in Internal Medicine at Massachusetts General Hospital, followed by a fellowship in gastroenterology at the University of Michigan. He was then recruited to the University of California, San Diego, where he grew his laboratory-based research in the area of DNA mismatch repair and colorectal cancer pathogenesis, and saw general medicine and gastroenterology patients. He also served as the main physician for hereditary colon cancer referrals in Southern California. His leadership roles included the gastroenterology Fellowship Director, the gastroenterology Section Chief for the San Diego VA Hospital, then Division Chief for University of California, San Diego, before being recruited to Michigan.
He was the founding Director of the NIH-funded UCSD Gastroenterology Center grant, and was the Director of the gastroenterology T32 training grant. His laboratory research continues to be funded by the NIH. Dr. Carethers also has interest in colorectal cancer disparities as it relates to genetics and outcomes. He is the former PI of the SDSU/UCSD Cancer Center Comprehensive Partnership U54 grant, which addresses cancer disparities. He has published over 165 manuscripts and book chapters. He is a Senior Associate Editor for Gastroenterology, the highest impact gastroenterology journal. He completed a 2-year appointment on the National Commission for Digestive Diseases, a U.S. Congressional Commission, after his appointment by Elias Zerhouni, MD, then Director of the National Institutes of Health. He was elected a member of the American Society for Clinical Investigation, and elected a member of the American Association of Physicians (AAP), and serves on the AAP Council. He was elected a member of the Institute of Medicine of the National Academy of Sciences in 2012.
Vice Chairs

Julie Bynum, MD, MPH
Faculty Affairs

Kevin Chan, MD
Clinical Experience & Quality

John Del Valle, MD
Graduate Medical Education

Scott Flanders, MD
External Relations

Cyril Grum, MD
Undergraduate Medical Education

Vibha Lama, MD, MS
Basic & Translational Research

Michael Lukela, MD
Diversity, Equity, Inclusion, and Well-Being

Rodica Pop-Busui, MD, PhD
Clinical & Health Services Research

Sanjay Saint, MD, MPH
Veterans Affairs
Associate Vice Chairs

Sarah Gualano, MD
Diversity, Equity, Inclusion, and Well-Being

Megan Mack, MD
Inpatient & Hospital

Julie Wright-Nunes, MD, MPH
Quality and Innovation
Division Chiefs

Allergy and Clinical Immunology Division
James Baldwin, MD

Cardiovascular Medicine Division
David Pinsky, MD

Gastroenterology and Hepatology Division
William Chey, MD

General Medicine Division
Eve Kerr, MD, MPH

Genetic Medicine Division
Goutham Narla, MD, PhD

Geriatric and Palliative Medicine Division
Raymond Yung, MB, ChB

Hematology and Oncology Division
Pavan Reddy, MD

Hospital Medicine Division
Robert Chang, MD (Interim Division Chief)

Infectious Diseases Division
Powel Kazanjian, MD, PhD

Metabolism, Endocrinology & Diabetes Division
Peter Arvan, MD, PhD

Nephrology Division
Subramaniam Pennathur, MD

Pulmonary & Critical Care Medicine Division
MeiLan Han, MD, MS

Rheumatology Division
John Varga, MD
Administration
Chief Administrative Officer

Musty Habhab is the Chief Administrative Officer for the Department of Internal Medicine at Michigan Medicine. In this role, she has administrative responsibility for all medical school, ambulatory care, and hospital operations of the Department, including finances, faculty and staff human resources, grants, and facilities. After earning her degree in Accounting from the University of Northern Iowa and passing the CPA exam, Musty moved to Michigan where she gained valuable experience working in the health system’s Hospital Finance Department. She has over 16 years of experience with the Department of Internal Medicine, serving initially as the Director of Finance and then as the Associate Administrator. She is actively involved in her national organization, the Alliance for Academic Medicine, where she has a seat on the council and is president of Administrators in Internal Medicine.
Directors and Division Administrators
Directors
- Director of Administrative Operations, Jolena Nollar
- Director of Clinical Affairs, Kendra Brown
- Director of Finance, Eric Mullen
Division Administrators
- Allergy & Clinical Immunology, Carrie Brown
- Cardiovascular Medicine, Joseph Zogaib
- Gastroenterology and Hepatology, Brandon Brogan
- General Medicine, Joel Scharboneau
- Genetic Medicine, Dorothy Schroeder
- Geriatric & Palliative Medicine, Stephanie Gatica
- Hematology & Oncology, Dorothy Schroeder
- Hospital Medicine, Fiona Linn
- Infectious Diseases, Jennifer Hawkins
- Metabolism, Endocrinology & Diabetes, Olushola Samuel
- Nephrology, Jason Ceo
- Pulmonary & Critical Care Medicine, Carrie Brown
- Rheumatology, Gary Smith