Education and Training

Medical School

MD - University of Pennsylvania School of Medicine, Philadelphia, PA


Pediatrics - Boston Combined Residency Program, Boston Children's Hospital and Boston Medical Center, Boston, MA


Pediatrics - Boston Combined Residency Program, Boston Children's Hospital and Boston Medical Center, Boston, MA


Pediatric Critical Care Medicine - The Children's Hospital of Philadelphia, Philadelphia, PA
Pediatric Cardiology - Boston Children's Hospital, Boston, MA

Board Certification

Pediatric Cardiology – American Board of Pediatrics
Pediatric Critical Care Medicine – American Board of Pediatrics
Pediatrics – American Board of Pediatrics

Titles and Academic Titles

Attending Physician

Assistant Professor of Clinical Anesthesiology and Critical Care, Perelman School of Medicine at the University of Pennsylvania

Departments and Services




Song Y, Morales L, Malik AS, Mead AF, Greer CD, Mitchell MA, Petrov MT, Su LT, Choi ME, Rosenblum ST, Lu X, VanBelzen DJ, Krishnankutty RK, Balzer FJ, Loro E, French R, Propert KJ, Zhou S, Kozyak BW, Nghiem PP, Khurana TS, Kornegay JN, Stedman HH: Non-immunogenic utrophin gene therapy for the treatment of muscular dystrophy animal models. Nature Medicine 25(10): 1505-1511, Oct 2019.


Su LT, Gopal K, Wang Z, Yin X, Nelson A, Kozyak BW, Burkman JM, Mitchell MA, Low DW, Bridges CR, Stedman HH: Uniform scale-independent gene transfer to striated muscle after transvenular extravasation of vector. Circulation 112(12): 1780-1788, Sep 2005.


Stedman HH, Kozyak BW, Nelson A, Thesier DM, Su LT, Low DW, Bridges CR, Shrager JB, Minugh-Purvis N, Mitchell MA: Myosin gene mutation correlates with anatomical changes in the human lineage. Nature 428(6981): 415-418, Mar 2004.


Kim DK, Zhu J, Kozyak BW, Burkman JM, Rubinstein NA, Lankford EB, Stedman HH, Nguyen T, Levine S, Shrager JB: Myosin heavy chain and physiological adaptation of the rat diaphragm in elastase-induced emphysema. Respiratory Research 4(1): 1-10, Feb 2003.


Shrager JB, Kozyak BW, Roberts JR, Bavaria JE, Friedberg JS, Kaiser LR, Rosengard BR: Successful experience with simultaneous lung volume reduction and cardiac procedures. Journal of Thoracic and Cardiovascular Surgery 122(1): 196-197, Jul 2001.

Posters and Presentations


Christopher D. Greer, Andrew F. Mead, Yafeng Song, Derek Stefanik, Leon Morales, Benjamin Kozyak, Hansell H. Stedman: Implications of Deep Evolutionary History of Locomotion for Muscular Dystrophy Transgene Design. American Society of Gene & Cell Therapy Meeting, Washington, DC May 2019 Notes: Poster Presentation. Outstanding poster award.

Awards and Honors

2019, Outstanding Poster Award, American Society of Gene & Cell Therapy
2019, Paul Weinberg Faculty Teaching Award, Inaugural Recipient, Children's Hospital of Philadelphia Cardiology Fellowship Program
2014, Kane/Owens Award for Compassionate Care – Boston Children’s Hospital Cardiology Fellowship
2011, Fred Lovejoy Resident Research Award – Boston Children’s Hospital Pediatrics Residency
2008, Morton McCutcheon Student Research Award – Univ. of Pennsylvania School of Medicine
2002, Sigma Xi Scientific Honor Society – Amherst College
2001, New England Small College Athletic Conference All-Academic Team

Editorial and Academic Positions

Academic and Institutional Committees

2020-present, Program Evaluation Committee, Advanced Fellowship in Cardiac Critical Care Medicine
2019-present, Steering Committee, Cardiac Center Morbidity & Mortality Conference
2019-present, Vascular Access Lead, Cardiac Center Vascular Access Improvement Program
2018-present, Steering Committee, Center for Advanced Single Ventricle Care
2017-present, Team Lead, Management of the Post-op Fontan Pathway, Cardiac Center Clinical Quality Improvement
2017-present, Selection Committee, Critical Care Medicine Fellowship

Leadership and Memberships

Memberships in Professional Organizations

2016-present, Pediatric Cardiac Intensive Care Society
2014-present, Society of Critical Care Medicine
2012-present, American Heart Association
2011-present, American College of Cardiology
2008-present, American Academy of Pediatrics