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 Elite provider by MediFind in Gastric Bypass. His top areas of expertise are Achalasia, Pancreatic Pseudocyst, Bile Duct Obstruction, Endoscopy, and Gastric Bypass.

Gastroenterologist Saowanee Ngamruengphong specializes in the endoscopic diagnosis and management of gastrointestinal malignancies, premalignant and malignant lesions in the gastrointestinal tract (e.g., early gastric cancer, Barrett's esophagus-associated neoplasia), esophageal cancer, colon polyps or early colorectal cancer, and pancreatic and biliary disease. Dr. Ngamruengphong earned a medical degree from Chulalongkorn University and completed residency training at the Texas Tech University Health Sciences Center. She undertook fellowship training in gastroenterology at the Mayo School of Graduate Medical Education and further fellowship training in therapeutic endoscopy at The Johns Hopkins Hospital. Her research interests include endoscopic resection and the management of precancerous or cancerous gastrointestinal lesions. Dr. Ngamruengphong is a member of several professional organizations, including the Thai Medical Council, the American College of Gastroenterology and the American Gastroenterological Association. Videos Endoscopic Submucosal Dissection (ESD) — Eileen’s Story Recent News Articles and Media Coverage A Rare, Stomach-Saving Endoscopic Procedure, Inside Tract (Spring 2021) Case Presentation: ESD-TAMIS, Inside Tract (Spring 2019) Innovative Approaches to Colorectal Surgery Benefit Patients, Surgery (Winter 2019) For Colorectal Polyps: Early Detection and Minimally Invasive Endoscopic Resection, Inside Tract (Winter, 2019) The Cutting Edge of Endoscopic Resection, Inside Tract (Spring, 2017) Stomach Cancer: Know Your Risks & Treatment Options, Johns Hopkins Surgery (4/26/2017). Dr. Ngamruengphong is rated as a Distinguished provider by MediFind in Gastric Bypass. Her top areas of expertise are Achalasia, Pancreatic Pseudocyst, Stomach Cancer, Endoscopy, and Gastric Bypass.

Dr. Magnuson specializes in gastrointestinal surgery, including surgeries of the stomach, gallbladder, pancreas and bowel. He has a special interest in bariatric surgery and established the Johns Hopkins Center for Bariatric Surgery in 1997. In 2006, the program was recognized as a Center of Excellence by the American Society for Bariatric Surgery. Dr. Magnuson completed his specialty training in gastrointestinal surgery at The Johns Hopkins Hospital, where he also completed a fellowship investigating issues related to gallstone pathogenesis and biliary tract disease. He is also a member of the Johns Hopkins Comprehensive Hernia Center. He is currently Chair of the Department of Surgery and Chief of General Surgery at Johns Hopkins Bayview Medical Center, and Vice Chair of Surgery at Johns Hopkins. Dr. Magnuson is rated as a Distinguished provider by MediFind in Gastric Bypass. His top areas of expertise are Hernia, Obesity, Gallstones, Gastric Bypass, and Gastrectomy.

Kimberley Steele is a General Surgeon in Baltimore, Maryland. Dr. Steele is rated as a Distinguished provider by MediFind in Gastric Bypass. Her top areas of expertise are Obesity, Hernia, Malnutrition, Gastric Bypass, and Sleeve Gastrectomy.

Ronald Prigeon is an Endocrinologist in Baltimore, Maryland. Dr. Prigeon is rated as a Distinguished provider by MediFind in Gastric Bypass. His top areas of expertise are Obesity, Type 2 Diabetes (T2D), Low Blood Sugar, and Gastric Bypass.

Jeanne Clark is a Radiologist in Baltimore, Maryland. Dr. Clark is rated as a Distinguished provider by MediFind in Gastric Bypass. Her top areas of expertise are Non-Alcoholic Fatty Liver Disease, Nonalcoholic Steatohepatitis (NASH), Menopause, Gastric Bypass, and Sleeve Gastrectomy.

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 Gastric Bypass. His top areas of expertise are Low Blood Sugar, Osteoporosis, Malnutrition, Gastric Bypass, and Gastrostomy.

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 Advanced provider by MediFind in Gastric Bypass. His top areas of expertise are Exocrine Pancreatic Insufficiency, Hereditary Pancreatitis, Acute Pancreatitis, Pancreatectomy, and Endoscopy.

Gina Adrales, M.D., M.P.H., joins the Johns Hopkins Department of Surgery as Director of the Division of Minimally Invasive Surgery, Director of the Minimally Invasive Surgery Training and Innovation Center, and Co-Director of the Johns Hopkins Bariatric Surgery Fellowship. Her areas of clinical expertise include gastroesophageal reflux disease (GERD), gallbladder disease, achalasia, splenectomy (spleen removal), benign gastric and intestinal surgery, bariatric surgery, and open and laparoscopic hernia repair (inguinal, ventral, incisional, umbilical, hiatal, paraesophageal). Dr. Adrales has been named an associate member of the American College of Surgeons' Academy of Master Surgeon Educators. Awardees are recognized for having devoted their careers to surgical education and are considered premier leaders in their respective fields. Prior to joining Johns Hopkins, Dr. Adrales was on faculty at Dartmouth where she directed the Surgery Clerkship, the Hernia Surgery Center, and the Bariatric Surgery Program. During her tenure at Dartmouth, she earned her Masters of Public Health at The Dartmouth Institute for Health Policy and Clinical Practice. She received her undergraduate degree from the College of William and Mary and her medical degree from the University of Virginia. She completed her residency at the Carolinas Medical Center and a research and clinical fellowship in minimally invasive surgery at the University of Kentucky before her first faculty appointment at the Medical College of Georgia. A national leader in hernia surgery, Dr. Adrales serves on the Executive Council of the Americas Hernia Society and previously served on the Executive Council of the Americas Hernia Society Quality Collaborative to improve the safety and quality of hernia surgery. She is actively involved in a number of committees for the Society of American Gastrointestinal and Endoscopic Surgeons including various roles in surgical education, the development of the Fundamentals of Endoscopic Surgery and an innovative interactive hernia surgery education module. Dr. Adrales’ research interests include health services research, clinical outcomes and quality improvement in minimally invasive foregut surgery, bariatric and metabolic surgery, and abdominal wall reconstruction. She has presented her work regionally, nationally, and internationally. Dr. Adrales is rated as an Advanced provider by MediFind in Gastric Bypass. Her top areas of expertise are Hernia, Hiatal Hernia, Gastroparesis, Gastrectomy, and Sleeve Gastrectomy.

Anthony Kalloo is a professor of medicine with special interests in natural orifice translumenal endoscopic surgery, therapeutic endoscopy and sphincter of Oddi dysfunction. After receiving his medical degree at the University of the West Indies Medical School, Dr. Kalloo interned at Port of Spain General Hospital in Trinidad and performed his internal medicine residency at Howard University Hospital in Washington, D.C., where he was also chief resident. He completed fellowship training at the combined Georgetown University, Veterans Affairs Medical Center and National Institutes of Health program. Dr. Kalloo was an instructor of medicine at Georgetown University prior to joining the Johns Hopkins faculty in 1988. He was director of the Johns Hopkins Division of Gastroenterology and Hepatology from 2005–2020, and was an associate editor of Gastrointestinal Endoscopy. In 2009, Dr. Kalloo was recognized by the American Society for Gastrointestinal Endoscopy as the Distinguished Educator of the Year. In 2014, he received the Endoscopy Award from the German Society for Endoscopy for outstanding research and contribution in the field of endoscopy. In 2015, he received the BJ Vakil Oration from the Society of Gastrointestinal Endoscopy of India, which is bestowed on an international expert for his contribution to the field of gastrointestinal endoscopy. He has authored over 200 peer-reviewed publications and has more than 100 patents, including the use of botulinum toxin in the gastrointestinal tract, endoscopic cryotherapy and the winged biliary/pancreatic stent, as well as others related to natural orifice surgery. He is the pioneer of natural orifice translumenal endoscopic surgery, a technique that will enable abdominal surgery without the use of incisions. In 2015, he became a member of the inaugural chapter of the National Academy of Inventors at The Johns Hopkins University. This group represents the top 3% of all faculty inventors since 1969, and the top 1.5% of active Johns Hopkins faculty. Dr. Kalloo is a past panel chair for gastroenterology and urology devices with the United States Food and Drug Administration. He aims to advance the understanding, diagnosis, treatment and prevention of gastrointestinal and liver disease through patient care, education and research. Dr. Kalloo is rated as an Advanced provider by MediFind in Gastric Bypass. His top areas of expertise are Hereditary Pancreatitis, Acute Pancreatitis, Achalasia, Endoscopy, and Gastrectomy.

Mark Kligman is a Bariatric Medicine provider in Baltimore, Maryland. Dr. Kligman is rated as an Advanced provider by MediFind in Gastric Bypass. His top areas of expertise are Obesity, Obesity in Children, Short Bowel Syndrome, Sleeve Gastrectomy, and Gastrectomy.

Ashraf Haddad is a General Surgeon in Baltimore, Maryland. Dr. Haddad is rated as an Advanced provider by MediFind in Gastric Bypass. His top areas of expertise are Obesity, Malnutrition, Gastroesophageal Reflux Disease (GERD), Gastric Bypass, and Gastrectomy.

Christina Li is a Bariatric Medicine provider in Randallstown, Maryland. Dr. Li is rated as an Advanced provider by MediFind in Gastric Bypass. Her top areas of expertise are Obesity, Hernia, Hiatal Hernia, Gastric Bypass, and Sleeve Gastrectomy.

John Harvey is a Vascular Surgeon in Hollywood, Maryland. Dr. Harvey is rated as an Advanced provider by MediFind in Gastric Bypass. His top areas of expertise are Cellulitis, Peripheral Artery Disease, Arterial Insufficiency, Gastric Bypass, and Hernia Surgery. Dr. Harvey is currently accepting new patients.

Susan Yanovski is a primary care provider, practicing in Family Medicine in Bethesda, Maryland. Dr. Yanovski is rated as an Advanced provider by MediFind in Gastric Bypass. Her top areas of expertise are Obesity, Congenital Hyperinsulinism, Type 2 Diabetes (T2D), Obesity in Children, and Gastric Bypass.

Dr. Nimgaonkar is gastroenterologist and a medical technology researcher at Johns Hopkins University. He is an assistant professor of medicine, a medical director at the Center for Bioengineering Innovation and Design in the JHU Biomedical Engineering department and an adjunct faculty at the JHU Carey Business School. He leads numerous translational technology research projects at Johns Hopkins in the areas of gastrointestinal and metabolic diseases. His particular interest is to investigate the physiology behind various interventions to treat metabolic diseases such as diabetes and obesity and apply various engineering tools to develop novel therapies for these diseases. He has been inventor on many technologies and a recipient of numerous awards including the AGA-Boston Scientific career development technology & innovation award and the CIMIT-Johnson & Johnson Young Clinician award. His work has been supported by grants from both foundational ​and federal (NIH, NSF) agencies. Recent News Articles and Media Coverage AGA - Boston Scientific Career Development Technology & Innovation Award, News Medical (December 5, 2014) Update on AGA - Boston Scientific Career Development Technology & Innovation Award, GI & Hepatology News (April 6, 2015) Pumped, Inside Tract (Winter 2016) Advanced POC Testing Devices Open New Avenues for Diagnostics, GEN Exclusives (November 22, 2016) A Multi-Biomarker Blood Test Clinically-Proven for Early Detection of Col0rectal Cancer PRWeb (May 2, 2017) Genetic Cancer Risk Test for 98 Geners, 24 Hereditary Cancers Bypassing Bypass Surgery, Inside Tract (Spring 2017) Despite Theranos, Real, Capital-Efficient Innovation Exists For Blood Tests, Life Science Leader (June 28, 2018) A Pill to Treat Diabetes, Scientific American (November 21, 2017) GI leader to know: Dr. Ashish Nimgaonkar of Johns Hopkins Medicine, Becker's Healthcare (August 31, 2018) Physician innovator working to bring new tech to patients, thanks to AGA funding, American Gastroenterological Association (April 9, 2019) AGA's featured researcher Dr. Ashish Nimgaonkar, Becker's Healthcare (April 17, 2019) Lab Website Ashish Nimgoankar Lab The Ashish Nimgoankar Lab is interested in translational technology development and image-guided therapies. Dr. Nimgaonkar is rated as an Experienced provider by MediFind in Gastric Bypass. His top areas of expertise are Obesity, Achalasia, Gastrointestinal Bleeding, Endoscopy, and Gastric Bypass.

Dr. Rick Redett is the physician-in-chief for Johns Hopkins Medicine, vice dean for clinical affairs, and president of the Faculty Practice. As a professor of plastic and reconstructive surgery and pediatrics at the Johns Hopkins University School of Medicine, his areas of clinical expertise include pediatric plastic surgery, cleft lip and palate surgery, obstetric brachial plexus palsy reconstruction, facial paralysis, pediatric burn surgery and reconstruction and genital reconstruction. Dr. Redett serves as the director of the Cleft and Craniofacial Center, and the director of the Facial Paralysis and Pain Center at Johns Hopkins. Dr. Redett directs the genital transplant program at Johns Hopkins. He graduated from Dartmouth Medical School after earning his undergraduate degrees in biology and psychology at Emory University. He did his general surgery and plastic surgery training at The Johns Hopkins Hospital. After completing a one-year pediatric plastic surgery fellowship at the Hospital for Sick Children in Toronto, Canada, Dr. Redett joined the Johns Hopkins faculty. Dr. Redett lectures nationally on facial paralysis, genital reconstruction and many other pediatric plastic surgery topics. He is a member of many professional organizations including the American Cleft Palate – Craniofacial Association, American Association of Plastic Surgeons and the American Society of Plastic Surgeons. Dr. Redett has a strong commitment to international health and has done many teaching medical missions to Central and South America and Africa. Dr. Redett serves on the Board of ReSurge International, a 501(c)(3) not-for profit organization which provides reconstructive surgical care for poor children and adults who lack access and builds surgical capacity in developing countries. He and his wife Becky are the proud parents of three wonderful children. Dr. Redett is rated as an Experienced provider by MediFind in Gastric Bypass. His top areas of expertise are Cleft Lip and Palate, Micrognathia, Facial Paralysis, Recurrent Peripheral Facial Palsy, and Gastric Bypass.

Dr. Bull-Henry joins Johns Hopkins as a hospitalist specializing in small bowel imaging, including single balloon enteroscopy, double balloon enteroscopy and wireless video capsule endoscopy. In addition, she has a special interest in small bowel GI bleeding, innovation in medical education and the use of artificial intelligence to attain greater diagnostic efficiencies, to improve patient outcomes and to achieve cost savings. Dr. Bull-Henry is active in her research. She has also published papers, contributed to book chapters and written abstracts on related clinical topics. Dr. Bull-Henry is active in a number of professional societies and currently serves on the Board of Governors and as Chair of the Training Committee for the American College of Gastroenterology. Videos Double Balloon EnteroscopyFAQ with Dr. Bull-Henry. Dr. Bull is rated as an Experienced provider by MediFind in Gastric Bypass. Her top areas of expertise are Angiodysplasia of the Colon, Gastroparesis, Painful Swallowing, Endoscopy, and Colonoscopy.

Rexford Ahima is an Endocrinologist in Baltimore, Maryland. Dr. Ahima is rated as an Experienced provider by MediFind in Gastric Bypass. His top areas of expertise are Obesity, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Sleeve Gastrectomy, and Gastric Bypass.

Dr. Maruthur has a primary care practice at the Levine Group Internal Medicine Practice at Johns Hopkins Green Spring Station. In addition to seeing patients for one-half day per week, Dr. Maruthur conducts clinical research in diabetes with an emphasis on prevention. She is especially interested in community-based approaches to improving diabetes outcomes and individualized medicine, the tailoring of preventive and treatment strategies based on an individual's biology and preferences. Dr. Maruthur also directs the JHU General Internal Medicine Fellowship. This provider is registered with the Florida Department of Health to perform telehealth services for patients in Florida. Dr. Maruthur is rated as an Experienced provider by MediFind in Gastric Bypass. Her top areas of expertise are Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Low Blood Sugar, Obesity, and Gastric Bypass.