Medical College of Wisconsin Department of Medicine Administration
Office of the Chair

Kevin R. Regner, MD, MS, FASN
Interim Chair, Professor

Angela DeMent
Interim Department Administrator; Associate Administrator, Operations

Ryan Lamp
Interim Department Administrator; Associate Administrator, Finance
Vice Chairs

Kathryn Flynn, PhD
Professor, Vice Chair for Research

Octavian Ioachimescu, MD, PhD, MBA
Vice Chair for Clinical Research & Data Analytics, Associate Director of Training and Education, Professor

David S. Marks, MD, MBA
Professor of Medicine and Radiology, Vice Chair for Clinical Affairs, Froedtert Hospital Senior Medical Director - Inpatient

Joshua A. Meskin, MD, FACC
Associate Professor; Vice Chair for Ambulatory Operations

Martin Muntz, MD, FACP
Associate Dean, Vice Chair, Professor

Sarah Nickoloff, MD
Associate Professor, Acting Vice Chair for Veteran Affairs

Daniel J. Stein, MD
Director, Associate Professor

Jane N. Wainaina, MD, FACP
Vice Chair, Associate Professor
Division Administrators


Tim Boyle
Division Administrator
General Internal Medicine

Kristi Castello
Division Administrator
Hematology and Oncology

Brenda Lund
Division Administrator
Pulmonary, Critical Care and Sleep Medicine

Jenny Oium
Division Administrator
Gastroenterology and Hepatology; Geriatric and Palliative Medicine

Jason Ruenger
Division Administrator
Cardiovascular Medicine

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
DOMAdmin@mcw.edu