Medical College of Wisconsin Department of Medicine Administration
Office of the Chair
![headshot](https://opd-resources.mcw.edu/FileLibrary/OPD/Providers/photos/Regner_Kevin2022.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Kevin R. Regner, MD, MS, FASN
Interim Chair, Professor
![headshot](/-/media/MCW/Departments/Medicine/People/Angela-DeMent_Academic-Profile.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Angela DeMent
Interim Department Administrator; Associate Administrator, Operations
![headshot](/-/media/MCW/Departments/Medicine/People/Ryan-Lamp_Academic-Profile.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Ryan Lamp
Interim Department Administrator; Associate Administrator, Finance
Vice Chairs
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Kathryn Flynn, PhD
Professor, Vice Chair for Research
![headshot](/-/media/MCW/Departments/Medicine/People/Octavian-Ioachimescu_Academic-Profile.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Octavian Ioachimescu, MD, PhD, MBA
Vice Chair for Clinical Research & Data Analytics, Associate Director of Training and Education, Professor
![headshot](https://opd-resources.mcw.edu/FileLibrary/OPD/Providers/photos/Marks_David2022.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
David S. Marks, MD, MBA
Professor of Medicine and Radiology, Vice Chair for Clinical Affairs, Froedtert Hospital Senior Medical Director - Inpatient
![headshot](https://opd-resources.mcw.edu/FileLibrary/OPD/Providers/photos/Meskin_Joshua.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Joshua A. Meskin, MD, FACC
Associate Professor; Vice Chair for Ambulatory Operations
![headshot](https://opd-resources.mcw.edu/FileLibrary/OPD/Providers/photos/Muntz_Marty2022.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Martin Muntz, MD, FACP
Associate Dean, Vice Chair for Faculty Development, Professor
![headshot](https://opd-resources.mcw.edu/FileLibrary/OPD/Providers/photos/Nickoloff-Sarah.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Sarah Nickoloff, MD
Associate Professor, Acting Vice Chair for Veteran Affairs
![headshot](https://opd-resources.mcw.edu/OPD-File-Library/Provider-Photos/Stein_Daniel.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Daniel J. Stein, MD
Director, Associate Professor; Vice Chair for Education
![headshot](https://opd-resources.mcw.edu/FileLibrary/OPD/Providers/photos/Wainaina_Jane2022.jpg?w=200&h=275&mode=crop&anchor=middlecenter&scale=both 200w)
Jane N. Wainaina, MD, FACP
Vice Chair for Quality, Associate Professor
Division Administrators
![headshot](/-/media/MCW/Departments/Medicine/Endocrinology/Faculty-and-Staff/Melissa-Bemus-Academic-Profile.jpg?w=280&h=385&mode=crop&anchor=middlecenter&scale=both 280w)
![headshot](/-/media/MCW/Departments/Medicine/Geriatrics-and-Gerontology/People/Tim-Boyle_Academic-Profile.jpg?w=280&h=385&mode=crop&anchor=middlecenter&scale=both 280w)
Tim Boyle
Division Administrator
General Internal Medicine
![headshot](/-/media/MCW/Departments/Medicine/People/Kristi-Castello_Academic-Profile.jpg?w=280&h=385&mode=crop&anchor=middlecenter&scale=both 280w)
Kristi Castello
Division Administrator
Hematology and Oncology
![headshot](/-/media/MCW/Departments/Medicine/People/Brenda-Lund_Academic-Profile.jpg?w=280&h=385&mode=crop&anchor=middlecenter&scale=both 280w)
Brenda Lund
Division Administrator
Pulmonary, Critical Care and Sleep Medicine
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Jenny Oium
Division Administrator
Gastroenterology and Hepatology; Geriatric and Palliative Medicine
![headshot](/-/media/MCW/Departments/Medicine/People/Jason-Ruenger_Academic-Profile.jpg?w=280&h=385&mode=crop&anchor=middlecenter&scale=both 280w)
Jason Ruenger
Division Administrator
Cardiovascular Medicine
![headshot](/-/media/MCW/Departments/Medicine/Infectious-Diseases/People/Jennifer-Tyrrell_Academic-Profile.jpg?w=280&h=385&mode=crop&anchor=middlecenter&scale=both 280w)
Jennifer Tyrrell
Division Administrator
Infectious Diseases; Nephrology
Contact Us
Department of Medicine
Medical College of Wisconsin
Hub for Collaborative Medicine
8th Floor
8701 Watertown Plank Rd.
Milwaukee, WI 53226
(414) 955-0518
DOMAdmin@mcw.edu
DOMAdmin@mcw.edu