David Hutcheon is a Gastroenterologist in Lutherville, Maryland. Dr. Hutcheon is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Gastrointestinal Bleeding, Intestinal Cancer, Angiodysplasia of the Colon, Colonoscopy, and Endoscopy.

Vikesh Singh is a gastroenterologist who specializes in pancreatology and pancreaticobiliary endoscopy. He evaluates and treats patients with inflammatory diseases of the pancreas, including acute and chronic pancreatitis and autoimmune pancreatitis as well as the complications of these diseases. After earning his medical degree from the Johns Hopkins University School of Medicine, Dr. Singh remained at Johns Hopkins to complete residency training in internal medicine. He pursued fellowship training in gastroenterology at Brigham and Women’s Hospital, and earned a master’s degree in epidemiology from the Harvard T. H. Chan School of Public Health. He then returned to Johns Hopkins, where he completed a two-year advanced endoscopy fellowship with a focus on pancreaticobiliary endoscopy. Dr. Singh has been on the faculty at Johns Hopkins since 2008, and rose to the rank of professor in 2021. His research interests include acute and chronic pancreatitis, autoimmune pancreatitis, exocrine pancreatic insufficiency, and novel methods to evaluate and treat abdominal pain. Dr. Singh is a member of the board of directors of the National Pancreas Foundation, chair of the Pancreatic Disorders Section of the American Gastroenterological Association, a councilor for the International Association of Pancreatology and a member of the inaugural medical advisory board for the Familial Chylomicronemia Syndrome Foundation. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Exocrine Pancreatic Insufficiency, Hereditary Pancreatitis, Acute Pancreatitis, Pancreatectomy, and Endoscopy.

Lawrence J. Cheskin, MD, FACP, FTOS, is now an adjunct professor of gastroenterology and general internal medicine at the Johns Hopkins School of Medicine. Since 2019, he has also been a professor (and chair from 2019 to 2024) of Nutrition and Food Studies in the College of Public Health at George Mason University in Fairfax, VA. In his research, Dr. Cheskin studies the effectiveness of various lifestyle and dietary changes in weight loss and weight maintenance. He has experience in the design and implementation of controlled clinical trials and laboratory studies of different dietary techniques, as well as individual and community-based interventions, including those targeting underserved residents of inner-city and suburban Baltimore. His background and experience are broad, ranging from basic science work on dopamine genetics to efforts aimed at preventing childhood obesity through systems-focused studies of the effects of policies and the built environment. Most recently, he has been studying health risk factors among young adult college students and the utility of mHealth in positively influencing diet and weight control. He has written approximately 250 peer-reviewed publications and 9 books and is frequently cited in the media on issues related to obesity, nutrition, and dieting. Dr. Cheskin is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Obesity, Malnutrition, Gastroesophageal Reflux Disease (GERD), Liver Embolization, and Endoscopy.

Dr. Po-Hung (Victor) Chen is a transplant hepatology and addiction medicine physician. He is jointly appointed by the Division of Gastroenterology and Hepatology and the Division of Addiction Medicine. Dr. Chen's clinical focus is to care for patients with general or transplant-related liver conditions, including alcohol-associated liver disease (ALD), metabolic dysfunction-associated steatotic liver disease (MASLD), viral hepatitis, autoimmune liver diseases, hemochromatosis, and other diagnoses. He directed the creation of a Johns Hopkins Medicine informational webpage on ALD. He is also a frequent consultant for other Johns Hopkins clinicians regarding inquiries about ALD, including biomarker interpretation, acute hepatitis management, and addiction treatment delivery. Dr. Chen is a member of multiple professional medical and public health organizations (see below). He is a Fellow of the American College of Gastroenterology and a Fellow of the American Society of Addiction Medicine. Dr. Chen is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Hepatitis, Hepatitis C, Alcoholic Cirrhosis, Liver Transplant, and Endoscopy.

David Cromwell is a Gastroenterologist in Towson, Maryland. Dr. Cromwell is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Gastrointestinal Bleeding, Familial Adenomatous Polyposis, Swallowing Difficulty, Endoscopy, and Colonoscopy.

Dr. Mullin is an associate professor of medicine at The Johns Hopkins University School of Medicine. Dr. Mullin has more than 30 years of clinical experience in the field of general gastroenterology. Dr. Mullin is a reviewer and also serves on the editorial board of numerous gastroenterology journals. Videos Hopkins at Home presents, A Woman's Journey: Is It Celiac Disease?. Dr. Mullin is rated as an Advanced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Small Bowel Bacterial Overgrowth, Irritable Bowel Syndrome (IBS), Diarrhea, Endoscopy, and Colonoscopy.

Todd T. Brown, MD, PhD is a clinical investigator who focuses on body composition, metabolic, and skeletal abnormalities observed in people with HIV, particularly as related to aging. Through translational investigation, epidemiologic studies, and clinical trials, he has been interested in understanding the pathogenesis of glucose disorders, fat changes, hormonal dysregulation, and osteoporosis in people with HIV, the consequences of these conditions (eg cardiovascular disease, frailty), and their optimal evaluation and management. Dr. Brown is rated as an Advanced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Low Blood Sugar, Osteoporosis, Malnutrition, Gastric Bypass, and Gastrostomy.

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 an Advanced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Cerebral Hypoxia, Malnutrition, HIV/AIDS, and Infantile Pneumothorax.

C. Nicholas Cuneo, M.D., M.P.H. is an assistant professor of Pediatrics and Medicine at the Johns Hopkins University School of Medicine. Dr. Cuneo is a graduate of the Harvard Brigham & Women’s Hospital/Boston Children’s Hospital Medicine-Pediatric Residency and served as chief resident for the Doris and Howard Hiatt Residency in Global Health Equity at Brigham & Women’s Hospital. He earned his B.S. in biology and anthropology at Duke University, his M.D. at the Johns Hopkins University School of Medicine, and his M.P.H. in clinical effectiveness at the Harvard T.H. Chan School of Public Health. He works as an academic hospitalist for children and adults at Johns Hopkins Hospital and Johns Hopkins Children's Center. He is the founding Executive Director of the HEAL Refugee Health & Asylum Collaborative, which provides trauma-informed, responsive health care and supportive services to immigrant survivors of torture and trauma, including Baltimore’s first comprehensive pro bono asylum clinic and the Restorative and Integrative Survivor Empowerment (RISE) Program for survivors of torture, for which Dr. Cuneo serves as Medical Director. Dr. Cuneo is a co-director of the Global and Refugee Health Leadership Track at JHUSOM and has extensive global health research and program management experience, particularly in Haiti, where he was a Harvard Medical School Doris Duke International Clinical Research Fellow, and South Africa, where he was a Fulbright Research Fellow in Public Health. In addition to his roles at JHUSOM, he is affiliated with the Johns Hopkins Center for Humanitarian Health and the Center for Public Health and Human Rights at Johns Hopkins Bloomberg School of Public Health. He further serves nationally as Co-Lead of the Asylum Medicine Training Initiative and on the Physicians for Human Rights Medical Expert Task Force. Dr. Cuneo is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are HIV/AIDS and Malnutrition.

Gastroenterologist Mouen Khashab specializes in therapeutic endoscopy, and he oversees this group of practitioners across the Johns Hopkins enterprise. Nationally and internationally known in the field of interventional endoscopy, Dr. Khashab has contributed immensely to the field’s advancement as a minimally invasive means to treat gastrointestinal and pancreaticobiliary disorders. Dr. Khashab earned his medical degree from the American University of Beirut Faculty of Medicine, and subsequently completed a residency in internal medicine and a fellowship in gastroenterology at Indiana University. He then completed a two-year fellowship at The Johns Hopkins Hospital before joining the faculty in 2011. A busy researcher, Dr. Khashab has published more than 600 papers in peer-reviewed journals. In 2013, he described the procedure called gastric peroral endoscopic myotomy (known as G-POEM) and was able to disseminate and teach it all over the world. Other procedures that he expanded include peroral endoscopic myotomy (POEM), peroral endoscopic myotomy with fundoplication (POEM-F), Zenker’s peroral endoscopic myotomy (Z-POEM) and full thickness resection. In 2022, he received the Master Endoscopist Award from the American Society for Gastrointestinal Endoscopy (ASGE) for his numerous contributions to the field. His procedural expertise includes endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), interventional EUS, submucosal endoscopy, POEM/achalasia, endoscopic mucosal resection, endoscopic submucosal dissection, luminal stenting, large polyp resection and Barrett’s therapy, among others. Dr. Khashab is involved with multiple gastrointestinal societies and has served on many committees, including the ASGE Standards of Practice Committee, which is in charge of formulating guidelines for the practice of endoscopy. He has also served as an associate editor for the journal Endoscopy, a premier journal in the field. Khashab is a highly sought-after speaker at national and international conferences, and he has participated in multiple live endoscopy conferences. Outside of academic medicine, Dr. Khashab is an entrepreneur. His major interest is in new technology and medical devices, and his goal is to disrupt the field by introducing technology that makes endoscopic procedures safer, easier, efficient and more scalable. Dr. Khashab is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Achalasia, Pancreatic Pseudocyst, Bile Duct Obstruction, Endoscopy, and Gastric Bypass.

Dr. Leticia Manning Ryan is an Associate Professor of Pediatrics at the Johns Hopkins University School of Medicine and has a joint appointment in the Johns Hopkins Bloomberg School of Public Health. Her areas of clinical expertise include pediatric emergency medicine. Dr. Ryan received her medical degree with honors from the University of Vermont College of Medicine and a master’s degree in public health, from the George Washington University School of Public Health and Health Services. She completed her clinical training (residency in pediatrics, chief residency in pediatrics, fellowship in pediatric emergency medicine) from 1999-2006 at Children’s National Medical Center in Washington, DC where she remained as a faculty member until 2013. Dr. Ryan’s research focuses on injury and violence prevention and has been funded through the National Institutes of Health and national and regional foundations. She completed a K23 Career Development Award to study the role of bone health in pediatric fractures and is a selected participant in the Robert Wood Johnson Foundation Interdisciplinary Research Leaders Program. Dr. Ryan has authored or co-authored more than forty articles and book chapters in the fields of injury and emergency medicine. Dr. Ryan is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Vitamin D Deficiency, Malnutrition, and Sudden Infant Death Syndrome (SIDS).

Jeff Tornheim, M.D., MPH, is a member of the International Maternal Pediatric Adolescent AIDS Clinical Trials Network, and is a term member of the Council on Foreign Relations. Dr. Tornheim graduated with a B.A. in International Development and Economics from Brandeis University, received his medical and public health degree from the Mount Sinai School of Medicine, completed a combined residency in Internal Medicine and Pediatrics at Yale University School of Medicine and a clinical fellowship in Infectious Diseases at Johns Hopkins University School of Medicine. Prior to completing his medical education, he worked on strengthening health systems for returning refugees to South Sudan, studied the epidemiology of pneumonia and diarrhea in Kenya with the Centers for Disease Control and Prevention (CDC) International Emerging Infections Program, studied adherence to latent tuberculosis treatment at the New York City Department of Health and Mental Hygiene in the Bureau of TB Control, and volunteered in an East Harlem free clinic. During his public health degree, he evaluated the impact of water policy on rates of pediatric diarrhea as well as Chagas Disease epidemiology and treatment in Bolivia through the Fogarty International Clinical Scholars Program. His interest in clinical outcomes for underserved populations has led to research, teaching, and clinical practice in Bolivia, India, Kenya, Peru, Rwanda, South Africa, South Sudan, Uganda, and the United States. His current NIH-supported research explores the application of whole genome sequencing, drug level testing, transcriptional and metabolomic profiling, and biomarker assessments to improved health outcomes in the treatment of adults and children with drug resistant tuberculosis in India. Dr. Tornheim is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Long Haul COVID, Bacterial Meningitis, Malnutrition, and HIV/AIDS.

Dr. Rita Kalyani is a Professor of Medicine at Johns Hopkins School of Medicine. She graduated with an undergraduate degree from Harvard College and completed her medical degree, residency, and fellowship at Johns Hopkins. She also obtained a Masters in Health Science degree in Clinical Investigation from the Johns Hopkins Bloomberg School of Public Health. As a NIH-funded clinician scientist, Dr. Kalyani has authored over 175 peer-reviewed publications and built a research program focused on understanding the factors leading to development of diabetes complications, particularly in high-risk populations. She has conducted epidemiological and patient-oriented research that has led to fundamental discoveries regarding the development of skeletal muscle loss, physical disability, and frailty in diabetes. She has also spearheaded studies investigating sex differences in cardiovascular disease and diabetes which have influenced primary prevention guidelines. Dr. Kalyani launched the Diabetes Management Service for Johns Hopkins’ Total Pancreatectomy Islet Auto Transplant Program in 2011. She is the co-founder of the Johns Hopkins Diabetes POC-IT Guide for healthcare professionals. She is also the founder and past Editor-in-Chief of the Johns Hopkins Patient Website to Diabetes. Dr. Kalyani has been the Chief Scientific and Medical Officer of the American Diabetes Association since 2025. She previously served as President of Medicine & Science on the ADA's National Board of Directors. She continues to have a clinical practice as an adult endocrinologist. Dr. Kalyani is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Seasonal Affective Disorder (SAD), Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Pancreatectomy, and Islet Cell Transplantation.

Dr. Malinda Wu is a pediatric endocrinologist seeing patients at the Johns Hopkins Children’s Center in Baltimore, Maryland. She specializes in a wide range of pediatric endocrine conditions including metabolic bone disease, pediatric osteoporosis and cystic fibrosis endocrinopathies. Dr. Wu received her M.D. from Jefferson Medical College, Thomas Jefferson University. She completed pediatrics residency at Penn State Hershey Medical Center and her pediatric endocrine fellowship at Emory University School of Medicine. She received her Master of Science in Clinical Research from Emory University (2021). Dr. Wu has been a faculty member at Johns Hopkins since 2021. Dr. Wu’s research interests are in metabolic bone disease and the health of women with cystic fibrosis. Dr. Wu’s current research is focused on women with cystic fibrosis and how estrogen supplementation may impact their health. She has received grant funding from the Cystic Fibrosis Foundation. Dr. Wu is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Osteogenesis Imperfecta, Hypogonadism, Malnutrition, Exocrine Pancreatic Insufficiency, and Hormone Replacement Therapy (HRT).

Jin He, M.D., Ph.D., is a professor of surgery at the Johns Hopkins University School of Medicine and is the Division Chief of Hepato-Pancreato-Biliary & Gastrointestinal Surgical Oncology. Dr. He specializes in diseases and tumors of the pancreas, liver, bile duct, and gallbladder. He performs open as well as minimally invasive (robotic and laparoscopic) surgery, including the Whipple procedure. Dr. He received his medical degree from Beijing Medical University and a Ph.D. in oncology from Fudan University Shanghai Medical College. He completed the Halsted general surgery residency training at Johns Hopkins, followed by an ACGME accredited fellowship in complex general surgical oncology at Johns Hopkins. Dr. He is the John Cameron Professor of Alimentary Tract Diseases. Dr. He’s research focuses on personalized treatment through stratifying pancreatic tumors on their genetic features. He holds several patents in anti-cancer vascular targeting agents and has published extensively in peer-reviewed journals and lectured internationally. He serves on several national committees, including the NCCN panel on neuroendocrine tumors and the Alliance for Clinical Trials in Oncology. Dr. He is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Pancreatic Cancer, Neuroendocrine Tumor, Cholangiocarcinoma (Bile Duct Cancer), Pancreaticoduodenectomy, and Pancreatectomy.

Dr. Meredith Atkinson is an associate professor of pediatrics in the Johns Hopkins University School of Medicine. She provides care for children with kidney problems of any type, including patients on dialysis; patients with proteinuria, hematuria and chronic kidney disease; and kidney transplant. Dr. Atkinson's clinical research interests focus on chronic kidney disease and end-stage kidney disease in children. Her specific interests include mechanisms and treatment of anemia in chronic kidney disease and racial disparities in patient outcomes. She is the recipient of numerous research grants and awards, including a K23 Patient Oriented Research award from the National Institute of Diabetes and Digestive and Kidney Diseases/NIH, and young investigator grants from the National Kidney Foundation, the National Kidney Foundation of Maryland, the Thrasher Research Fund and Amgen Inc. She is currently the PI of the Renal Anhydramnios Fetal Therapy (RAFT) trial. She received her undergraduate degree in biology from Mount Holyoke College. She earned her M.D. from the University of Rochester School of Medicine and Dentistry. She completed a residency in pediatrics at Johns Hopkins, followed by a fellowship in pediatric nephrology at Hopkins, completed in June 2007. During her fellowship training, Dr. Atkinson received a master’s degree in epidemiology from the Johns Hopkins Bloomberg School of Public Health. Dr. Atkinson joined the Johns Hopkins faculty in 2007. Dr. Atkinson was elected to the Society for Pediatric Research in 2014. She is a member of several professional organizations including the American Society of Nephrology, and is the president of the American Society of Pediatric Nephrology for 2024-2026. Dr. Atkinson is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Potter Syndrome, Lupus Nephritis, Glomerulonephritis, Anemia, and Kidney Transplant.

Dr. Gerald Raymond is a clinical geneticist and neurologist at Johns Hopkins where he is also a professor of genetic medicine and neurology. He obtained his MD at the University of Connecticut and was trained in Pediatrics at Johns Hopkins Hospital and Neurology at the Mass. General Hospital. He received additional training in developmental neuropathology at the Universite Catholique de Louvain in Belgium and clinical genetics at the Harvard Program. Dr. Raymond’s research has been at the overlap of genetics and neurology with specific focus on peroxisomal disorders including adrenoleukodystrophy. He has been actively involved in newborn screening for ALD and in developing clinical follow-up programs. He has extensive experience in clinical management of neurogenetic issues including peroxisomal and lysosomal disorders. He presently serves as the Director of the Lysosomal Storage Disease program in the department of Genetic Medicine. Dr. Raymond is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Adrenoleukodystrophy (ALD), CACH Syndrome, Zellweger Syndrome, and Leukodystrophy.

Karen Kotloff is a Pediatric Infectious Disease specialist and a Pediatrics provider in Baltimore, Maryland. Dr. Kotloff is rated as a Distinguished provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Diarrhea, Malnutrition, Viral Gastroenteritis, and Parainfluenza. Dr. Kotloff is currently accepting new patients.

Yusra Azmi is a primary care provider, practicing in Internal Medicine in Timonium, Maryland. Dr. Azmi is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Heart Failure with Preserved Ejection Fraction (HFpEF), Pulmonary Edema, Heart Failure, and Hypertension. Dr. Azmi is currently accepting new patients.

Mirrah Mumtaz is an Endocrinologist in Timonium, Maryland. Dr. Mumtaz is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Malnutrition, Type 2 Diabetes (T2D), Thyroid Storm, and Hyperthyroidism.