Department of Physical Medicine and Rehabilitation

Penn’s Physical Medicine and Rehabilitation Department is led by experienced and accomplished physicians and researchers.

Timothy Dillingham, MD, MS

Chair of the Department of Physical Medicine and Rehabilitation

Photo of Timothy Dillingham, MD, MS

Dr. Dillingham is the William J. Erdman II, Professor and Chair for the Department of Physical Medicine and Rehabilitation at the University of Pennsylvania. 

He attended the University of Washington in Seattle, Washington where he earned his medical degree in 1986. He completed his internship and residency in rehabilitation medicine at the University of Washington in 1990 and earned a Master of Science degree in gait biomechanics. Dr. Dillingham is board certified in Physical Medicine and Rehabilitation as well as Electrodiagnostic Medicine.

Following his training, Dr. Dillingham served for four years in the United States Army at Walter Reed Army Medical Center, in Washington, D.C. Upon completing his military service in 1994, Dr. Dillingham joined the Department of PM&R at Johns Hopkins University. In 2003, he assumed the Chairmanship of the Department of PM&R at the Medical College of Wisconsin in Milwaukee, Wisconsin. Dr. Dillingham has won three resident teaching awards during his career. His research interests have encompassed electrodiagnostic medicine, prosthetic engineering, and rehabilitation health services use and outcomes. He has received federal funding from both the VA and NIH for his investigative work over the past 17 years.

Dr. Dillingham has been active in the American Association of Neuromuscular and Electrodiagnostic Medicine (AANEM) for more than 20 years. He served as board member, Chairman of the Research Committee, and has lectured and served as a board examiner for many years. In 2010, Dr. Dillingham was elected President of the AANEM and served in that capacity from 2010 to 2011. In 2010 he was awarded the Distinguished Researcher Award by the AANEM. Currently, Dr. Dillingham chairs the Normative Data Taskforce.

David Lenrow, MD, JD

Program Director

Photo of David Lenrow, MD, JD

Dr. Lenrow has been the Residency Program Director for the Department of Physical Medicine and Rehabilitation at the University of Pennsylvania since 2011. He has also served as the Medical Director of the Erdmann Outpatient Center, Director of the Amputee and Stroke Rehabilitation Programs at the Hospital of the University of Pennsylvania, and the department's Director of Undergraduate Education for several years. Previous positions include Associate Director of Residency Training, Medical Director of the Inpatient Rehabilitation Unit, and Vice Chair of Clinical Services. He served as Interim Chair of the Department of Physical Medicine and Rehabilitation from January 2011 through September of 2011.

After earning his BA degree from Penn in 1981, Dr. Lenrow went on to receive his MD degree from SUNY Downstate in 1985. He began his residency training in General Surgery at the University of Illinois Hospital from 1985 to 1987. Returning to Penn, he became a postdoctoral fellow in Transplantation Research from 1987 to 1989 and subsequently a general surgery resident from 1989 to 1990. From 1990 to 1993, Dr. Lenrow completed the Physical Medicine and Rehabilitation Residency Program at Penn.

After a year as a clinical associate, Dr. Lenrow was appointed Assistant Professor of Rehabilitation Medicine at HUP in 1994, and was promoted to Associate Professor in 2003.

In 2002, Dr. Lenrow graduated Magna Cum Laude from the Temple University School of Law.

Dr. Lenrow was recognized in Philadelphia Magazine's May 2002 Top Docs™ issue and has received the Teacher of the Year award on three occasions from the Penn PM&R residents. He has been a member of the Penn Spine Center for over 20 years.

Franklin Caldera, DO, MBA

Associate Program Director

Photo of Franklin Caldera, DO, MBA

Dr. Caldera is the Associate Director of the Residency Training Program for the Department of Physical Medicine and Rehabilitation at the University of Pennsylvania. Most recently, Dr. Caldera was named Chief Medical Officer for the Pennsylvania Institute for Rehabilitation Medicine.

He received a Bachelor of Science in Biology in 1998 from Binghamton University. He matriculated into the New York College of Osteopathic Medicine and simultaneously earned a Doctor of Osteopathic Medicine and Masters in Business Administration in 2002 at New York Institute of Technology.

After graduation, he completed a one year medical internship at Saint Clare's Hospital in New York, NY in 2003. He then entered a residency in Physical Medicine and Rehabilitation Medicine at Metropolitan Hospital, where he was a Chief Resident, graduating in July of 2005.

Dr. Caldera then proceeded to fulfill his military service obligations with the United States Army Medical Corps at Tripler Army Medical Center in Honolulu, Hawaii in the US Pacific Command. Initially, he was assigned as a staff physiatrist from September 2006 to July 2007. In 2007 he was promoted to Chief of Physical Medicine and Rehabilitation Services at Tripler, achieving the rank of Major, U.S. Army Medical Corps.

Dr. Caldera began working at the Hospital at the University of Pennsylvania in August 2010. He is the Director of the Musculoskeletal Ultrasound course, which is given annually to all the PM&R residents in Philadelphia. His awards include the PM&R Teacher of the Year (2012), Binghamton Success Program Scholarship Award recipient (May 1998), and the Health Professional Scholarship Program recipient from the United States Army (May 1998).

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