Dr. Jun is a pulmonary, critical care, and sleep medicine physician. He is an expert in the diagnosis and treatment of sleep-disordered breathing, and in the care of critically ill patients in the Medical ICU. He is a member of the Sleep Fellowship Program Evaluation and Clinical Competency Committee and provides teaching to medical students and residents at Johns Hopkins. Dr. Jun is rated as an Elite provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Cerebral Hypoxia, Obstructive Sleep Apnea, Obesity Hypoventilation Syndrome (OHS), and Central Sleep Apnea.

Gregg Semenza is a Pediatrics provider in Baltimore, Maryland. Dr. Semenza is rated as an Elite provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Cerebral Hypoxia, Pulmonary Hypertension, Hypertension, and Anemia.

Paul M. Hassoun, M.D., is professor of medicine at the Johns Hopkins University School of Medicine and the director of the pulmonary hypertension program at Johns Hopkins Hospital. He received his medical degree from the Faculté de Médecine Lariboisière-Saint Louis at the University of Paris, France, completed an internship and residency at Brigham and Women’s Hospital and a fellowship in Pulmonary and Critical Care Medicine at Massachusetts General Hospital, both at Harvard Medical School. He was on faculty in the pulmonary division at New England Medical Center/Tufts University School of Medicine (Tufts-NEMC) in Boston, MA, until 2002 when he joined the division of pulmonary and critical care medicine at Johns Hopkins University. Dr. Hassoun has served or currently serves on numerous American Thoracic Society (ATS) assemblies and committees, including the Pulmonary Circulation Long Range Planning Committee, the Pulmonary Circulation Program Committee (for which he served as chair for 2008-2009), the ATS Scientific Advisory Council, Pulmonary Circulation Leadership Committee, and the American College of Chest Physicians Vascular Steering Committee. He served as the ATS Pulmonary Circulation chair (2011-2012) and on the ATS Publications Policy Committee. He was recently elected president of the Pulmonary Vascular Research Institute (PVRI; 2018-2019). Dr. Hassoun has held numerous editorial activities including serving on the editorial board of the American Journal of Respiratory and Critical Medicine (2010 to present), CHEST (2006-2015) and the European Respiratory Review (2008-2015). He currently serves as associate editor of the European Respiratory Journal (2013-present) and has served as associate editor for the Journal of Clinical Investigation (2017-2022). Dr. Hassoun is rated as a Distinguished provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Pulmonary Hypertension, Systemic Sclerosis (SSc), Pulmonary Veno-Occlusive Disease, Cerebral Hypoxia, and Lung Transplant.

Dr. Pham is a physician who specializes in pulmonary, critical care, and sleep medicine. He provides care for critically ill patients in the Medical ICU. His clinical focus is in the diagnosis and management of sleep-disordered breathing. He provides teaching to medical students, residents, and fellows at Johns Hopkins. Lab Website Polotsky Research Lab - Lab Website Research Summary Dr. Pham’s research focus is on the mechanisms and impact of sleep disordered breathing, with a particular emphasis on the role of hypoxia. His research interests have led him to the highlands of Peru, where he collaborates extensively with the CRONICAS cohort investigators to characterize the impact of hypoxia on respiratory patterns, cardiovascular responses and metabolism. He is currently involved in developing low-cost readily deployable strategies to treat sleep disordered breathing at high altitude. He has also pursued his research interests by modeling the metabolic impact of ambient hypoxia in the sleep lab. As a member of the leadership of the Center for Interdisciplinary Sleep Research and Education (CISRE), he is committed to improving investigators’ access to sleep recording and data analysis. Dr. Van Pham is rated as a Distinguished provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Obstructive Sleep Apnea, Cerebral Hypoxia, Central Sleep Apnea, and Obesity Hypoventilation Syndrome (OHS).

Pediatric and neonatal neurologist Joseph Scafidi is a clinician-scientist with expertise in pre-term neonatal brain injury, hypoxic ischemia and neurodevelopmental disorders. He directs the Michael V. Johnston Center for Developmental Neuroscience at Kennedy Krieger Institute. Dr. Scafidi earned a degree in osteopathic medicine from the Philadelphia College of Osteopathic Medicine. He completed residency training in pediatrics at Rutgers University Medical School as well as in child neurology at Children’s National Hospital, where he also undertook fellowship training in neonatal neurology. Additionally, Dr. Scafidi was a postdoctoral research fellow in developmental neurobiology at Children’s National Research Institute. His research interests focus on understanding metabolic adaptations after perinatal brain injury in the acute and long-term recovery phases, specifically how different cell populations in different brain regions use energy after injury and how these adaptations or maladaptations affect the recovery process. As a practicing pediatric and neonatal neurologist, Dr. Scafidi is ideally positioned to facilitate bench-to-bedside therapies through his laboratory and to improve knowledge of disease by developing and testing bedside-to-bench, research-driven hypotheses. Dr. Scafidi is rated as a Distinguished provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Cerebral Hypoxia, Seizures, Benign Rolandic Epilepsy, Premature Infant, and Endovascular Embolization.

Dr. Eric McCollum is a pediatric pulmonologist at the Johns Hopkins School of Medicine. He has expertise in global child respiratory health with more than ten years of clinical and research experience in low-resource settings in southern Africa and south Asia. After having lived in Malawi for five years as a clinician with the Baylor Pediatric AIDS Corps and as a NIH Fogarty International Clinical Research Fellow, Dr. McCollum is now primarily based in the countries of Lesotho and Bangladesh. He is the principal investigator of a NIH K01 International Research Scientist Development Award, through the Fogarty International Center, examining the role of pulse oximetry in Bangladeshi children with clinical pneumonia. Dr. McCollum is also a co-investigator for a study comprehensively examining the effectiveness of the pneumococcal conjugate vaccine in rural Bangladeshi children. In the southern African country of Malawi Dr. McCollum is the principal investigator of a randomized controlled trial investigating the effectiveness of bubble continuous positive airway pressure in children hospitalized with severe clinical pneumonia. He has successfully designed, led, or co-led several multi-site studies in developing countries throughout Africa and Asia including the novel application of pulse oximetry for children with clinical pneumonia by rural Malawian frontline health workers and digital auscultation as a respiratory diagnostic in six low-resource countries participating in the Pneumonia Etiology Research for Child Health study. Dr. McCollum has been recognized globally for his contributions to child respiratory health. He has won multiple early career investigator awards and is currently a member of the World Health Organization Technical Support Network for pneumococcal conjugate vaccine impact studies and a member of the World Health Organization expert global working group for the World Health Organization chest radiograph guidelines for children. He holds a joint faculty appointment in the Department of International Health at the Johns Hopkins School of Public Health. Dr. Mccollum is rated as a Distinguished provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Cerebral Hypoxia, Malnutrition, HIV/AIDS, and Infantile Pneumothorax.

Dr. Kolb is a specialist in Pulmonary and Critical Care Medicine with special focus on pulmonary vascular disease and Critical Care Medicine. He is an expert in the diagnosis and management of all forms of chronic pulmonary hypertension, and has special interests in the chronic thromboembolic pulmonary hypertension, peri-operative and ICU management of pulmonary hypertension. He is an expert in the management of acute pulmonary embolism, leads the Johns Hopkins Pulmonary Embolism Response Team, and provides longitudinal ambulatory follow-up for patients after acute pulmonary embolism. He has extensive experience in the diagnosis and management of all forms of acute respiratory failure and other life-threatening conditions such as shock, gastrointestinal bleeding, pulmonary embolism, diabetic ketoacidosis and hyperosmolar states, and acute kidney and liver failure. Dr. Kolb is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Pulmonary Hypertension, Systemic Sclerosis (SSc), Pulmonary Veno-Occlusive Disease, Cerebral Hypoxia, and Lung Transplant.

Dr. Catherine Simpson is an assistant professor of medicine at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include internal medicine, pulmonary and critical care medicine, and pulmonary vascular diseases. Dr. Simpson earned her M.D. from the Louisiana State University School of Medicine. She completed her residency at Johns Hopkins, where she also performed a fellowship in pulmonary and critical care medicine and earned her M.H.S. degree from the Johns Hopkins Bloomberg School of Public Health. Dr. Simpson is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. Her top areas of expertise are Pulmonary Hypertension, Hypertension, Pulmonary Veno-Occlusive Disease, and Scleroderma.

Dr. Allen Everett is a professor of pediatrics at the Johns Hopkins University School of Medicine. His areas of clinical expertise include general pediatric cardiology. Dr. Everett earned his M.D. from East Tennessee State University. He completed his residency in pediatrics and fellowship in pediatric cardiology at the University of Virginia. Dr. Everett joined the Johns Hopkins faculty in 2003. He has become the program leader at Johns Hopkins in pediatric biomarker discovery, with a particular focus on brain injury, pulmonary hypertension and effects of medical plastics exposure on congenital heart disease outcomes. He is the principal investigator (PI) or co-PI on multiple NIH- funded R01 studies. Dr. Everett also serves as the director of the Pediatric Proteome Center. Dr. Everett is an author of over 140 peer review papers, three book chapters, editor/author of the Illustrated Field Guide to Congenital Heart Disease and Repair, now in its fourth edition, and senior associate editor for the journal, Cardiology in the Young. He is a co-developer of PedCathTM cardiac catheterization software with Scientific Software Solutions which has been translated into five languages, has five US biomarker patents filed and brain injury biomarkers licensed to ImmunArray, Ltd. Dr. Everett is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Hypertension, Pulmonary Hypertension, Congenital Heart Disease (CHD), Heart Bypass Surgery, and Heart Transplant.

Aparna Balasubramanian is a Pulmonary Medicine provider in Baltimore, Maryland. Dr. Balasubramanian is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. Her top areas of expertise are Pulmonary Hypertension, Chronic Obstructive Pulmonary Disease (COPD), Pulmonary Veno-Occlusive Disease, Emphysema, and Lung Transplant.

Dr. Melanie Kandt Nies is a pediatric cardiologist specializing in congenital heart disease, echocardiography and pulmonary hypertension. She completed her medical school education at the University of North Carolina School of Medicine, followed by her residency and pediatric cardiology and fellowship at the Johns Hopkins Children’s Center. Dr. Nies' research focuses on non-invasive diagnosis, therapeutic monitoring and prognosis of pulmonary hypertension using non-invasive imaging and biomarkers. She has advanced training in echocardiography and proteomic biomarker discovery. She works as part of a multidisciplinary team at Johns Hopkins Hospital, caring for patients with pulmonary hypertension, and as part of Kennedy Krieger Institute’s multidisciplinary team for the care of patients with congenital diaphragmatic hernia. Dr. Nies lives in Baltimore City with her husband and two young sons. She and her family are fans of the Baltimore Orioles and Ravens, and enjoy the many city parks, food and cultural activities of Baltimore City. Dr. Nies is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. Her top areas of expertise are Hypertension, Pulmonary Hypertension, Cerebral Hypoxia, and High Blood Pressure in Infants.

Lewis Romer is a Pediatrics provider in Baltimore, Maryland. Dr. Romer is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Cerebral Hypoxia, Pulmonary Hypertension, Hypertension, and Bronchopulmonary Dysplasia.

Dr. Checkley specializes in intensive care medicine. He is an expert in the diagnosis and management of acute respiratory failure and the acute respiratory distress syndrome. He also has extensive experience in the management of other life-threatening conditions commonly seen in the medical intensive care unit, including septic shock, acute gastrointestinal bleeding, acute liver failure, among other critical conditions. Dr. Checkley earned his M.D. from Northwestern University and received his Ph.D. from Johns Hopkins University. He completed his internal medicine residency training at Emory University and fellowship training in pulmonary and critical care medicine at Johns Hopkins School of Medicine. His research interests include International lung health, epidemiology, mechanical ventilation and acute lung injury. Dr. Checkley has been recognized by the National Institute of Health with the 2007 Post-doctoral National Research Service Award and the 2009 Pathway to Independence Career Award. Dr. Checkley is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Pneumonia, Chronic Obstructive Pulmonary Disease (COPD), Asthma, and Cerebral Hypoxia.

Daniel Brodie is an Intensive Care Medicine specialist and a Pulmonary Medicine provider in Baltimore, Maryland. Dr. Brodie is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Acute Respiratory Distress Syndrome (ARDS), COVID-19, Respiratory Acidosis, Lung Transplant, and Embolectomy.

Dr. Raul Chavez-Valdez is an Associate Professor of Pediatrics at the Johns Hopkins University School of Medicine. His area of clinical expertise is Neonatology. Dr. Chavez Valdez completed Medical School in Lima Peru, Pediatric residency at University of Illinois at Chicago, and post-doctoral Fellowship in Neonatology-Perinatology and Community Pediatrics at Johns Hopkins University-School of Medicine where he was awarded the 2007 Eudowood Board Bauernschmidt Fellowship Award. Since 2005 his research has been focused in mechanisms of neurotrophism with particular interest in the neurological disorders evolving during the perinatal period. His work has been reported in many national and international meetings and many publications in prestigious journals. He received the Johns Hopkins SOM Clinician Scientist Award and funding from the NINDS/NIH in 2017. Dr. Valdez is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Hypothermia, Cerebral Hypoxia, Apnea of Prematurity, and Infantile Apnea.

Dr. Damarla is a specialist in Pulmonary and Critical Care Medicine. He is an expert in the diagnosis and management of all forms of acute respiratory failure, including asthma, pneumonia, C.O.P.D., neuromuscular diseases, and the acute respiratory distress syndrome. He also has extensive experience in the management of other life-threatening conditions such as gastrointestinal bleeding, pulmonary embolism, diabetic ketoacidosis and hyperosmolar states, and shock from sepsis, hypovolemia, and heart disease. Dr. Damarla is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Cerebral Hypoxia, Pulmonary Hypertension, Acute Respiratory Distress Syndrome (ARDS), and Pneumonia.

Theodore Iwashyna is a Pulmonary Medicine provider in Baltimore, Maryland. Dr. Iwashyna is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Acute Respiratory Distress Syndrome (ARDS), Severe Acute Respiratory Syndrome (SARS), Cerebral Hypoxia, and COVID-19.

Dr. Hager is a specialist in Critical Care Medicine. He is an expert in the diagnosis and management of all forms of acute respiratory failure, including asthma, pneumonia, C.O.P.D., neuromuscular diseases, and the acute respiratory distress syndrome. He also has extensive experience in the management of other life-threatening conditions such as pulmonary embolism, gastrointestinal hemorrhage, shock from sepsis, hypovolemia, and heart disease, and metabolic emergencies such as diabetic ketoacidosis and hyperosmolar states. Dr. Hager is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Severe Acute Respiratory Syndrome (SARS), COVID-19, Acute Respiratory Distress Syndrome (ARDS), and Cerebral Hypoxia.

Roy Brower is a Professor of Medicine at Johns Hopkins University and was Medical Director of the Medical Intensive Care Unit at Johns Hopkins Hospital for over 30 years. He obtained his M.D. degree and completed his residency and fellowship in Pulmonary and Critical Care Medicine at Johns Hopkins. Brower’s earlier research explored mechanisms of cardiopulmonary interactions and pulmonary circulation physiology. He subsequently focused research efforts in the clinical venue. Brower has led four multicenter clinical trials of lung-protective mechanical ventilation strategies in patients with the acute respiratory distress syndrome (ARDS). One of these trials demonstrated substantially improved clinical outcomes in ARDS patients who received mechanical ventilation with lower tidal volumes. Brower was a member of the NIH ARDS Network from its inception in 1994. He was the Chair of the Steering Committee of the NIH Prevention and Early Treatment of Acute Lung Injury (PETAL) Network from 2014 to 2023. Brower has been actively involved in the American Thoracic Society. He served on the Program Committee of the Pulmonary Circulation Assembly and chaired the ATS Critical Care Assembly Planning Committee for two years. He served as chair of the Critical Care Assembly from 2003-2005 and is the recipient of the Critical Care Lifetime Achievement Award. Brower chaired the ATS Publications Policy Committee from 2012 to 2016 and twice received the ATS Presidential Citation. Brower is an accomplished clinical educator. The Johns Hopkins Osler Medical Residency Program awarded him its annual award for outstanding teaching twice, in 1996 and in 2015. The Johns Hopkins Pulmonary and Critical Care Medicine Fellowship program awarded him its annual Fellows Teaching Award in 2009. As the former Medical Director of the Medical Intensive Care Unit at Johns Hopkins Hospital, Brower focused the energy of the critical care staff to develop rigorous, evidence-based protocols and practice guidelines. He promotes standardization of care with good protocols because they help to reduce medical errors, improve the clinical research environment, and serve as effective teaching tools. Dr. Brower is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Acute Respiratory Distress Syndrome (ARDS), Cerebral Hypoxia, Acute Interstitial Pneumonia, Lung Transplant, and Gastrostomy.

Dr. Putcha is a pulmonary and critical care physician. She is an expert in the diagnosis and treatment of lung disease (specifically obstructive lung diseases such as COPD and asthma), and in the care of critically ill patients in the Medical ICU. She is a member of the Lung Research Conference Planning Committee and provides teaching to medical students and residents at Johns Hopkins. Dr. Putcha is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. Her top areas of expertise are Chronic Obstructive Pulmonary Disease (COPD), Emphysema, Cerebral Hypoxia, and Asthma.