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.

Elizabeth Mcilmoyle is an Intensive Care Medicine provider in Glen Burnie, Maryland. Dr. Mcilmoyle is rated as an Experienced provider by MediFind in the treatment of Cerebral Hypoxia. Her top areas of expertise are Pleurisy, Lung Metastases, Chronic Obstructive Pulmonary Disease (COPD), and Obstructive Sleep Apnea.

Peter Olivieri is an Intensive Care Medicine provider in Glen Burnie, Maryland. Dr. Olivieri is rated as an Experienced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Lung Nodules, Lung Cancer, Squamous Cell Lung Carcinoma, Gastrostomy, and Advanced Bronchoscopy.

John Wiley is an Intensive Care Medicine provider in Glen Burnie, Maryland. Dr. Wiley is rated as an Experienced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Pleural Effusion, Pleurisy, Lung Nodules, and Lung Metastases.

Hariharan Regunath is an Intensive Care Medicine provider in Glen Burnie, Maryland. Dr. Regunath is rated as an Experienced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Human Granulocytic Ehrlichiosis, Sepsis, Infective Endocarditis, Thrombectomy, and Endoscopy.

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.

Dr. Fawzy is a pulmonary and critical care physician. He is an expert in the diagnosis and treatment of lung disease with a particular focus on asthma and COPD (emphysema and chronic bronchitis) and in the care of critically ill patients in the Medical ICU. Dr. Fawzy earned his M.D. from Stony Brook University. He completed his residency at Boston University Medical Center and fellowship in pulmonary and critical care medicine at Johns Hopkins University. Dr. Fawzy joined the Johns Hopkins faculty in 2020, and is supported by the NIH to conduct clinical and translational research investigating the role of platelet phenotypes in COPD. Dr. Fawzy is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Chronic Obstructive Pulmonary Disease (COPD), Cerebral Hypoxia, Emphysema, and Bronchitis.

Dr. McCormack is a pulmonary, critical care physician and Associate Director of the Pulmonary & Critical Care Medicine Division. She is an expert in the diagnosis and treatment of patients with obstructive lung disease, including those with asthma and COPD. She has expertise in pulmonary physiology. She serves as the Medical Director of the Johns Hopkins University Pulmonary Function Laboratory and as the Chair of the American Thoracic Society Pulmonary Function Test Committee. She earned her M.D. from Jefferson Medical College of Thomas Jefferson University and her M.H.S. from the Bloomberg School of Public Health. She completed her residency at Thomas Jefferson University Hospital and performed a fellowship in pulmonary and critical care medicine at Johns Hopkins. She was the recipient of the Frederick L. Brancati Excellence in Mentoring Award. She plays an active role in mentoring fellows and junior faculty in the Pulmonary & Critical Care Medicine Division. Dr. Mccormack 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), Asthma, Acute Interstitial Pneumonia, Interstitial Lung Disease, and Lung Transplant.

Matthew Lammi, MD MSCR is an Associate Professor of Medicine and part of the Interstitial Lung Disease (ILD) Program. Dr. Lammi obtained his medical degree from Temple University School of Medicine and did his internal medicine, pulmonary, and critical care training at Temple University Hospital. He then joined the faculty at LSU in New Orleans, where he served as the Director of the Comprehensive Pulmonary Hypertension Center. He joined Johns Hopkins in 2023. He currently serves as the Associate Director of the Johns Hopkins Pulmonary Fibrosis Foundation Care Center and is the Associate Program Director for the Advanced Lung Disease Fellowship. His research focuses on the intersection between ILD and pulmonary hypertension, particularly in patients with systemic sclerosis. He is currently a co-Principal Investigator for a clinical trial of therapy for scleroderma associated pulmonary hypertension supported by the Department of Defense Peer Reviewed Medical Research Program. He is active in numerous societies and serves as the Chair of the Research Committee for the Pulmonary Hypertension Association. Dr. Lammi is rated as an Advanced provider by MediFind in the treatment of Cerebral Hypoxia. His top areas of expertise are Pulmonary Hypertension, Sarcoidosis, Systemic Sclerosis (SSc), Interstitial Lung Disease, and Lung Transplant.

Dr. Hansel is a pulmonary and critical care medicine physician. She is an expert in the diagnosis and treatment of obstructive airway diseases, including asthma and chronic obstructive pulmonary disease (COPD), and care of patients in the Medical ICU. Dr. Hansel 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, Asthma, Bronchitis, and Endoscopy.

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.