Johns Hopkins All Children's Hospital Heart Institute

Meet Our Team

Our team provides comprehensive pediatric and perinatal cardiology care for patients with congenital heart defects and other cardiac problems.

Heart Institute Leadership

Administration

Lisa Moore, M.S.N., M.H.A, R.N.Senior Director, Nursing

Moore, who joined the team in 1990, has more than 28 years of nursing and administrative experience. She earned her Bachelor of Nursing degree at the University of Florida and a Master of Science in Nursing and Health Administration from the University of Phoenix. She has many years of pediatric cardiac critical care nursing experience and has served in numerous roles at Johns Hopkins All Children’s Hospital, including administrative director of the Heart Center, director of Pediatric Medicine, clinical manager of the cardiovascular intensive care unit (CVICU), and extracorporeal membrane oxygenation (ECMO) coordinator. Moore has presented at multiple national and international symposia and holds an American Nurses Credentialing Center (ANCC) Board Certification for advanced nurse executives.

Nhue Do, M.D. Cardiovascular Surgery

Dr. Do specializes in congenital cardiothoracic surgery at the Johns Hopkins All Children’s Heart Institute. He is an assistant professor of surgery at the Johns Hopkins University School of Medicine. He received his medical degree from the Keck School of Medicine at the University of Southern California. Dr. Do trained at the Beth Israel Deaconess Medical Center at Harvard University in Boston, Massachusetts, specializing in general surgery and a postdoctoral fellowship in abdominal transplantation.
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Plato Alexander, M.D. Critical Care Medicine

Dr. Alexander earned his medical degree at the University of Texas Medical School in Houston. He trained in pediatrics at the University of South Florida College of Medicine/Johns Hopkins All Children’s Hospital and served as chief resident in general pediatrics. He then completed a pediatric critical care fellowship at Duke University Children’s Hospital in Durham, North Carolina. Dr. Alexander also holds a M.B.A. with an emphasis in health sector management and policy from the University of Miami.
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Queenie D'Costa, M.D. Critical Care Medicine

Dr. D’Costa specializes in critical care medicine in the cardiovascular intensive care unit (CVICU) at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2019.
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Farhan Malik, D.O. Critical Care Medicine

Dr. Malik specializes in cardiac critical care in the Johns Hopkins All Children's Heart Institute. He joined the hospital staff in 2015. Dr. Malik earned his medical degree at New York College of Osteopathic Medicine and completed his pediatric residency at Newark Beth Israel Medical Center/Children’s Hospital of New Jersey. He completed a pediatric critical care fellowship at the University of Texas Medical School.
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Julia Mercer, M.D. Critical Care Medicine

Dr. Mercer joined the cardiac critical care program at the Johns Hopkins All Children’s Heart Institute in August 2017. She completed a pediatric cardiac critical care fellowship at Children’s Hospital of Pittsburgh/University of Pittsburgh Medical Center and a pediatric critical care fellowship at the University of Alabama at Birmingham. A graduate of the University of South Florida College of Medicine, Dr. Mercer did her residency training at the University of Florida pediatric residency program at Sacred Heart Hospital in Pensacola, Florida. 
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Jason Parker, D.O. Critical Care Medicine

Dr. Parker is interim associate director of the cardiovascular intensive care unit in the Johns Hopkins All Children's Heart Institute. He joined the hospital staff in 2016. Dr. Parker earned his medical degree at the University of Medicine and Dentistry of New Jersey School of Osteopathic Medicine. He completed an osteopathic pediatric-focused internship at Kennedy Health System in Stratford, New Jersey, and then a pediatric residency at Thomas Jefferson University/AI duPont Hospital for Children. He completed a fellowship in pediatric critical care at Cohen Children’s Medical Center of New York and a fellowship in pediatric cardiac intensive care at The Heart Institute at Children’s Hospital of Denver.
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Sangeetha Rao, M.D. Critical Care Medicine

Dr. Rao is a physician in the cardiovascular intensive care unit (CVICU) at Johns Hopkins All Children’s Hospital. She joined the medical staff in 2018.
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Michelle Smith, M.D. Critical Care Medicine

Dr. Smith specializes in critical care medicine in the cardiovascular intensive care unit (CVICU) and pediatric intensive care unit (PICU) at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2015. She earned her medical degree at Georgetown University School of Medicine and completed her pediatric residency at Children’s Hospital, Los Angeles. She completed her pediatric critical care fellowship at The Johns Hopkins University.
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