Learn more about the Department of Medicine's leadership team.

Michael Parmacek, MD, Chair Department of Medicine

Michael S. Parmacek, MD

Dr. Parmacek performed residency training in Internal Medicine at the University of Michigan. He performed clinical and research fellowship training in Cardiology at Northwestern. Following fellowship training he performed a postdoctoral research fellowship at the HHMI at the University of Michigan. Dr. Parmacek was appointed to the faculty of the Department of Medicine (Cardiology) at Michigan (1987-92). He then joined the faculty of the University of Chicago serving as Co-Chair of the Cardiology Fellowship training program (1992-1998). Dr. Parmacek was recruited to Penn, where he served as Chief of the Cardiovascular Medicine Division from 1998 until 2014. During his tenure, the Cardiovascular Division ascended to the top tier of academic cardiology divisions in the United States. Dr. Parmacek was appointed founding Director of the Penn Cardiovascular Institute in 2005. The Parmacek laboratory is recognized for discoveries influencing understanding of the molecular and genetic basis of congenital heart disease, diseases of the aorta, heart failure and regenerative biology. Dr. Parmacek has been elected to the ASCI, AAP, and he has served on the Advisory Council of the NHLBI.

Todd Barton, MD, Program Director

Todd Barton, MD

Todd Barton is the Program Director of the internal medicine residency program and an Associate Professor of Clinical Medicine in the Division of Infectious Diseases.Todd was raised in St. Louis and remains a committed Cardinals fan, even while slowly shifting other loyalties to Philadelphia sports teams. He went to college at Swarthmore College where he met his wife, dabbled in sportscasting, and majored in Chemistry and English Literature.Todd attended the University of Rochester School of Medicine & Dentistry, where he led an AIDS Education Task Force in his pre-clinical time. Between second and third years of medical school, Todd did a year out research project with the Immunodeficiency Program at Penn, where his interest in caring for HIV-infected patients was cemented.After medical school graduation, he came to Penn for residency and infectious diseases fellowship. Todd served for a year as Chief Medical Resident, furthering a life-long interest in teaching, and was appointed as Associate Program Director for the internal medicine residency program in 2003. Under the mentorship of Lisa Bellini, he became Senior Associate Program Director in 2009, and was appointed Program Director in 2016.Todd maintains a broad inpatient clinical practice in general infectious diseases, HIV, oncologic infectious diseases, and general internal medicine.His wife, Maryl Kreider, is the director of the pulmonary and critical care fellowship program at Penn, and they have two teenaged children and a teenaged dog. Todd’s hobbies include acting in community theater and over consumption of cheeseburgers and milkshakes. 

Serena Cardillo, MD, Associate Program Director

Serena Cardillo,  MD

Dr. Cardillo is an Associate Professor of Clinical medicine in the Division of Endocrinology, Diabetes & Metabolism. She is also an Associate Program Director and Core Faculty Member in Endocrinology for the Internal Medicine Residency Program. Dr. Cardillo’s clinical practice is based at the Penn Rodebaugh Diabetes Center where she serves as the Director of Graduate Diabetes Education. Dr. Cardillo also leads the Interactive Learning Module for internal medicine residents and oversees elective experiences for the program. Her interests in medical education are in the use of simulation to assess and teach communication skills. At the postgraduate level she has led several innovative national education programs in the area of diabetes management for primary care providers. In her spare time, Dr. Cardillo enjoys cooking, traveling with her husband and 2 daughters and reading historical fiction.

Judd Flesch, MD, Associate Program Director

Judd David Flesch, MD

Dr. Flesch is an Assistant Professor of Clinical Medicine in the Division of Pulmonary, Allergy, and Critical Care. He also serves as an Associate Program Director for the Internal Medicine Residency Program and Site Director for the Residency Program at Penn Presbyterian Medical Center (PPMC). Dr. Flesch’s clinical interests include consultative pulmonology and respiratory failure. He attends on the General Medicine Service, the Pulmonary Consultation Service, and the Medical Intensive Care Unit at PPMC. He is also an Associate Director of the Penn Medicine Program for LGBT Health, and has an interest in the climate for LGBT medical trainees and educating trainees in the care of LGBT patients. 

Eric Palecek, MD, Associate Program Director 

Eric J. Palecek,  MD

Dr. Palecek is an Assistant Professor of Clinical Medicine in the Division of General Internal Medicine and serves as an Associate Program Director for the Internal Medicine Residency Program. He oversees the continuity clinic experiences for residents and the outpatient general medicine curriculum. Clinically, he is based at the Edward S. Cooper Internal Medicine Practice, a blended resident-attending practice, where he sees his own patients and supervises residents. He also attends on the general medicine inpatient teaching service at Penn Presbyterian Medical Center. His academic interests lie in innovative ways to deliver outpatient curriculum to trainees. In his free time, he enjoys playing with his two kids and trying to catch a Packers game whenever they play in the northeast. 

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