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Graduate Medical Education Leadership

Institutional Leadership

George Jallo, MD

George Jallo, MD Vice Dean; Physician-in-Chief

Dr. Jallo joined Johns Hopkins in 2003 as a pediatric neurosurgeon. In 2013, he became the pediatric neurosurgery division director. Dr. Jallo moved to Johns Hopkins All Children's in 2015 to launch the Institute for Brain Protection Sciences, a multi-disciplinary institute that unites clinicians, researchers and educators focused on protecting neurodevelopment and caring for children with injuries and illnesses that affect the brain.

Dr. Jallo has published more than 245 peer-reviewed scientific articles, 89 book chapters and is co-editor of five textbooks on pediatric neurosurgery, pediatric epilepsy surgery and neuroendoscopy. He earned his medical degree at the University of Virginia Medical School and completed his residency at New York University Medical Center and fellowship at Beth Israel Medical Center.

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Jennifer Maniscalco, MD, MPH, MAcM

Jennifer Maniscalco, MD, MPH, MAcM Designated Institutional Official

Dr. Maniscalco joined Johns Hopkins All Children's Hospital as a faculty member in 2018. She is the Designated Institutional Official (DIO) and her academic work relates to clinical teaching, promoting trainee autonomy, and mentorship.

She is a former pediatric hospital medicine fellowship director and chaired the AAP Section on Hospital Medicine PHM Fellows Conference from 2015-2018. She was the 2017 recipient of the PHM Award for Educational Excellence. She completed her pediatric residency and pediatric hospital medicine fellowship at Children's National Medical Center in Washington, D.C.

Pediatric Residency Program

Akshata Hopkins, MD, FAAP, FHM

Akshata Hopkins, MD, FAAP, FHM Program Director, Pediatric Residency Program

Dr. Hopkins specializes in caring for hospitalized children and serves as the residency program director at Johns Hopkins All Children's Hospital. She has been a core faculty educator since 2014, the first year of the program.

Dr. Hopkins has developed the Quality Improvement, Patient Safety and Patient Experience longitudinal multimodal curriculum for the pediatric residents. Her research interests involve developing a bridging leader role between Graduate Medical Education and Health Care Delivery in order to create a truly integrated clinical learning environment. She graduated from the Armstrong Institute Leadership in Quality and Patient Safety in May 2018 with a research focus on High Value Care.

Hopkins graduated from the seven-year combine program at University of Florida College of Medicine in Gainesville, Florida. She completed her residency and served as chief resident at the University of Florida College of Medicine, Jacksonville, Florida.

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Melissa Brinn, MD

Melissa Brinn, MD Assistant Program Director, Pediatric Residency Program

Dr. Brinn is a general pediatrician and currently leads the Resident Continuity Clinic. Dr. Brinn was a former Associate Program Director in Greenville, South Carolina, before joining the Johns Hopkins All Children’s Hospital Pediatric Residency Program faculty in 2015. Her current interests in research include Adverse Childhood Events and Trauma Informed Care.

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Matthew Thomas, MD

Matthew Thomas, MD Assistant Residency Program Director and Co-Director of the Academic Coaching Program

Dr. Thomas specializes in pediatric infectious diseases in the Department of Medicine. He serves as an assistant residency program director and is co-director of the academic coaching program within the residency program. He is seeking a Master of Education in Healthcare Professions at Johns Hopkins University School of Education. His academic interests include faculty development around academic coaching strategies and teaching methods. He joined Johns Hopkins All Children’s Hospital in 2016, after completing a fellowship in Pediatric Infectious Diseases at the University of Miami School of Medicine/Jackson Memorial Hospital. Before that, he completed his Pediatrics training and chief residency at West Virginia University/Charleston Area Medical Center. Dr. Thomas received his medical degree from West Virginia University School of Medicine with tracks in global and public health. He has received multiple career, educational and volunteer awards throughout his career.

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Chief Residents

Sarah Czack, MD

Sarah Czack, MD Chief Resident

Dr. Sarah Czack is a chief resident at Johns Hopkins All Children’s Hospital. She earned her medical degree from University of Kentucky College of Medicine. Her clinical interests include learning about the ways social determinants affect a child’s health, neonatal abstinence syndrome, genetics, global health, and hematology/oncology.

Shannon Glenn-Otto, MD

Shannon Glenn-Otto, MD Chief Resident

Dr. Shannon Glenn-Otto is a chief resident at Johns Hopkins All Children’s Hospital. She earned her medical degree from University of Miami Miller School of Medicine. Her clinical interests include primary care, particularly social determinants of health and child health advocacy.

Pediatric Fellowship Programs

Bone Marrow Transplant Fellowship Program

Benjamin Oshrine, MD

Benjamin Oshrine, MD Fellowship Director, Bone Marrow Transplant

Dr. Oshrine is the division chief of blood and marrow transplant and specializes in blood and marrow transplants as a pediatric hematologist/oncologist in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. His clinical focus is in the treatment of high-risk leukemias with blood and marrow transplantation, and his research focus is in immune recovery after transplant. He joined the hospital in 2014 after completing a fellowship in pediatric hematology/oncology at the Children’s Hospital of Philadelphia. He received the Excellence in Service & Professionalism Award in the 2018 Johns Hopkins Medicine Clinical Excellence Awards. Dr. Oshrine earned his medical degree from the University of Virginia School of Medicine and completed his residency at Boston Children’s Hospital. He is certified by the American Board of Pediatrics and a member of the American Society of Pediatric Hematology/Oncology, the Children’s Oncology Group and the American Society of Transplant and Cellular Therapy.
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Pediatric Surgery Fellowship Program

Paul Danielson, MD

Paul Danielson, MD Fellowship Director, Pediatric Surgery

Dr. Danielson specializes in general surgery and serves as chief of the division of pediatric surgery at Johns Hopkins All Children’s Hospital. He was an early adopter of minimally invasive surgical techniques and has expertise in treating chest wall deformities. Dr. Danielson was named Johns Hopkins All Children’s Hospital physician of the year in the 2015 Johns Hopkins Medicine Clinical Excellence Awards. He joined the hospital staff in 2009.
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Nicole Chandler, MD

Nicole Chandler, MD Associate Fellowship Director, Pediatric Surgery

Dr. Nicole Chandler is a graduate of the University of Massachusetts Medical School, Worcester, MA, where she completed her general surgical residency. She also was a Research Fellow in Surgery at Beth Israel Deaconess Medical Center, Harvard Medical School, and was principal investigator for a grant that focused on overcoming chemoresistance in pancreatic cancer.
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Pediatric Surgical Critical Care Fellowship Program

Raquel Gonzalez, MD

Raquel Gonzalez, MD Fellowship Director, Pediatric Surgical Critical Care

Dr. Gonzalez is a pediatric and surgical critical care surgeon at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2017. She was previously the surgical critical care fellowship program director at the Detroit Medical Center and also served as a member of the American Pediatric Surgical Association Surgical Critical Care Committee. Dr. Gonzalez received her medical degree from the University Of Puerto Rico School Of Medicine and trained in general surgery at Saint Barnabas Medical Center in Livingston, New Jersey. Dr. Gonzalez then completed a surgical critical care fellowship at University of Michigan Health Systems & CS Mott Children’s Hospital and a pediatric surgery fellowship at the Children’s Hospital of Michigan. She subsequently completed a Master’s in Health Care Management at Harvard T.H. Chan School of Public Health.
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Neonatal-Perinatal Medicine Fellowship Program

Joana Machry, MD, FAAP

Joana Machry, MD, FAAP Program Director, Neonatal-Perinatal Medicine Fellowship

Joana Machry, M.D., FAAP, is program director of the Johns Hopkins All Children’s Hospital Neonatal-Perinatal Medicine Fellowship Program and instructor in pediatrics at the Johns Hopkins University School of Medicine. Dr. Machry received a Department of Pediatrics Teaching Excellence Award as a resident at Jackson Memorial Hospital/University of Miami Miller School of Medicine, where she completed her pediatric residency and fellowship in Neonatal-Perinatal Medicine.
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Aaron Germain, MD, FAAP

Aaron Germain, MD, FAAP Associate Program Director, Neonatal-Perinatal Medicine Fellowship

Aaron M. Germain, M.D., FAAP, is associate program director of the Johns Hopkins All Children’s Hospital Neonatal-Perinatal Medicine Fellowship Program and instructor in pediatrics at the Johns Hopkins University School of Medicine. Dr. Germain was named Pediatric Resident Teacher of the Year at the University of South Florida College of Medicine.
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Pediatric Critical Care Medicine Fellowship Program

Ashley Siems, MD, M.Ed.

Ashley Siems, MD, M.Ed. Program Director, Pediatric Critical Care Medicine Fellowship

Dr. Siems is a physician in Pediatric Critical Care Medicine at Johns Hopkins All Children's Hospital. She earned her medical degree from New York Medical College, completed pediatric residency at the Icahn School of Medicine at Mount Sinai Hospital in New York where she stayed on for a chief resident year. She then pursued her fellowship in pediatric critical care medicine at Children' National Hospital in Washington, DC where she stayed on as faculty until joining the All Children's team in 2020. Dr. Siems also earned her Masters in Education from George Washington University where her career interests include training non-technical skills in medicine. She is also an expert in simulation and utilizes simulation to study team dynamics in medicine. She is passionate about improving the quality of care we deliver utilizing an interdisciplinary and interprofessional approach to medicine.

Anthony Sochet, MD, MS

Anthony Sochet, MD, MS Associate Program Director, Pediatric Critical Care Medicine Fellowship

Dr. Sochet is a physician in Pediatric Critical Care Medicine at Johns Hopkins All Children’s Hospital who joined the hospital staff in 2016 and is an Assistant Professor on Anesthesiology and Critical Care Medicine at the Johns Hopkins University School of Medicine. He earned his medical degree at Florida State University College of Medicine, completed his pediatric residency at University of South Florida College of Medicine, fellowship in Pediatric Critical Care Medicine at Children’s National Medical Center, and Masters of Health Science in Clinical and Translational Research from the George Washington University. His research interests include an “-omics” approach to identifying modifiable risk factors for acute respiratory failure, machine learning to assess non-invasive modality failure, optimal nutrition delivery during critical illness, and the incorporation of industrial psychology and team science in healthcare.
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Pediatric Hospice and Palliative Medicine Fellowship Program

Laura Drach, DO

Laura Drach, DO Program Director, Pediatric Hospice and Palliative Medicine Fellowship

Dr. Drach joined the All Children’s Hospitalist program in 2009. She is a graduate of Nova Southeastern University College of Osteopathic Medicine and completed her pediatric residency at All Children’s/USF. Dr. Drach is board certified in pediatrics and has an extensive background in pediatric oncology nursing and has a strong interest in pain management and palliative care.
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Jacinda Hays, DO

Jacinda Hays, DO Associate Program Director, Pediatric Hospice and Palliative Medicine Fellowship

Dr. Hays joined the hospital staff in 2020 and is board certified in Hospice and Palliative Medicine and Pediatrics. Before joining Johns Hopkins All Children’s, Dr. Hays was an adult and pediatric inpatient palliative care physician and neonatal abstinence syndrome program director where her leadership involved creating and sustaining a new model of care for substance exposed infants and their families.
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Pediatric Hospital Medicine Fellowship Program

Bob Dudas, MD

Bob Dudas, MD Fellowship Director, Hospital Medicine

Dr. Dudas is chief academic hospitalist at Johns Hopkins All Children’s Hospital. He is an associate professor of pediatrics and associate director of general pediatrics and adolescent medicine in the Department of Pediatrics for the Johns Hopkins University School of Medicine. Dr. Dudas also serves as chair of general pediatrics, hospital and adolescent medicine at Johns Hopkins All Children’s Hospital and is program director of the Johns Hopkins All Children’s Hospital Pediatric Hospital Medicine Fellowship. He joined the hospital staff in 2015.
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Kim Collins, MD

Kim Collins, MD Associate Fellowship Director, Hospital Medicine

Dr. Collins is a pediatric hospitalist and the associate program director of the pediatric hospital medicine fellowship at Johns Hopkins All Children’s Hospital. She joined the hospital in 2014 and serves as a core faculty member of the pediatric residency program and co-director of the residency program’s hospitalist rotation.
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Pediatric Neuro-Oncology Fellowship Program

Stacie Stapleton, MD

Stacie Stapleton, MD Program Director, Pediatric Neuro-Oncology Fellowship

Dr. Stapleton is the director of pediatric neuro-oncology at Johns Hopkins All Children’s Hospital. Dr. Stapleton joined the hospital in 2007 and is double-board certified by the American Board of Pediatrics in general pediatrics and pediatric hematology/oncology. She has formal training in pediatric neuro-oncology.
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Thomas Geller, MD

Thomas Geller, MD Associate Program Director, Pediatric Neuro-Oncology Fellowship

Dr. Geller specializes in pediatric neurology for the Johns Hopkins All Children’s Institute for Brain Protection Sciences. He sees patients at the main campus in St. Petersburg and at Johns Hopkins All Children’s Outpatient Care, North Port. He joined the hospital staff in 2018. Dr. Geller previously was a pediatric neurologist and child neurology residency program director at Cardinal Glennon Children's Medical Center in St. Louis, Missouri. He retired as a captain from the U.S. Navy Medical Corps. He is board certified in pediatrics and child neurology.
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Pediatric Neurosurgery Fellowship Program

George Jallo, MD

George Jallo, MD Fellowship Director, Pediatric Neurosurgery

George Jallo, M.D., is medical director of the Johns Hopkins All Children's Hospital Institute for Brain Protection Sciences (IBPS) and chief of Pediatric Neurosurgery and joined the team in September 2015. This new multidisciplinary institute unites clinicians, researchers and educators in a comprehensive program to promote optimal neurodevelopment early in life and provide state-of-the-art care for children with injuries or illness that can affect the brain.
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Pediatric Sports Medicine Fellowship Program

James Toldi, DO

James Toldi, DO Program Director, Pediatric Sports Medicine Fellowship

Dr. Toldi is a sports medicine physician at Johns Hopkins All Children’s Hospital. He joined the medical staff in 2020. He also serves as director of the hospital’s Pediatric Sports Medicine Fellowship Program. Dr. Toldi treats all sports related injuries but has a passion for concussion education, evaluation and treatment. He has developed a systematic approach to screening concussions as well as safe, evidenced-based return to learn and return to sport protocols. He continues his research focus on sports-related concussions at Johns Hopkins All Children’s.
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Sarah Irani, MD

Sarah Irani, MD Associate Program Director, Pediatric Sports Medicine Fellowship

Dr. Irani practices in the Sports Medicine program at Johns Hopkins All Children’s Hospital. She is board certified in pediatrics and eligible for certification in sports medicine. She is involved in a research study through the Johns Hopkins All Children's Institute for Brain Protection Science that follows a group of youth athletes to learn more about the effects of sports-related concussions on a child’s neuropsychiatric, neuropsychological, and cognitive functioning. Her clinical interests include concussions, ACL injuries in soccer players, and overuse injuries in dancers.
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