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

Dr. Brianna Aoyama is an assistant professor of pediatrics at the Johns Hopkins University School of Medicine. She specializes in pediatric pulmonary medicine, including chronic lung disease of premature infants, lung disease in medically complex patients including those with ventilators and tracheostomies, aerodigestive disorders, and general pediatric pulmonary conditions. Dr. Aoyama attended the University of Notre Dame for undergraduate studies and received her M.D. from the University of Connecticut School of Medicine. She completed her pediatric residency at Brown University/Hasbro Children's Hospital before completing her pediatric pulmonary fellowship at Johns Hopkins where she also earned her M.H.S. (Clinical Investigation) from the Johns Hopkins Bloomberg School of Public Health. Dr. Aoyama joined the Johns Hopkins faculty in 2022. Her primary research interest is in the epidemiology of pediatric respiratory diseases, with a specific focus on growth and the long-term respiratory outcomes of children born preterm. Dr. Aoyama is rated as an Experienced provider by MediFind in Gastrostomy. Her top areas of expertise are Bronchopulmonary Dysplasia, High Blood Pressure in Infants, Premature Infant, Pulmonary Hypertension, and Gastrostomy.

Ernest Tsao is a Gastroenterologist in Baltimore, Maryland. Dr. Tsao is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Hepatitis, Gas Bloat Syndrome, Hepatitis C, Endoscopy, and Gastrectomy.

Steven Epstein is a Gastroenterologist in Baltimore, Maryland. Dr. Epstein is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Familial Adenomatous Polyposis, Attenuated Familial Adenomatous Polyposis, Cronkhite-Canada Disease, Gastrectomy, and Colonoscopy.

Dr. Onwueme graduated with Distinction from Yale University with dual BSc/MSc degrees in chemistry and received MD and PhD degrees from Weill Cornell Medical College. He completed his Internal Medicine residency at Brigham and Women’s Hospital (Clinical Fellow Harvard Medical School) and his Gastroenterology fellowship at Johns Hopkins University School of Medicine. He is currently the Director of clinical trials at Woodholme Gastroenterology and has an ardent interest in the role of microbial metabolites in gut diseases. Dr. Onwueme prizes commitment to quality and compassionate patient care to which he devotes his practice. He has expert knowledge in gut microbiology and a special interest in diarrheal diseases, disordered gut motility, autoimmune and inflammatory bowel disease. Dr. Onwueme is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Gastric Dysmotility, Diverticular Disease, Diarrhea, Endoscopy, and Gastrectomy.

Eric Blum is a Gastroenterologist in Baltimore, Maryland. Dr. Blum is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Diverticular Disease, Familial Adenomatous Polyposis, Viral Gastroenteritis, Colonoscopy, and Endoscopy.

Dr. Cunningham earned his M.D. from George Washington University and completed general surgery residency at the University of Maryland. He has completed fellowships in both oncology research and pancreatic and hepatobiliary surgery at Johns Hopkins Hospital. Throughout his career, he has been a prolific contributor and editor with over 100 contributions to a variety of medical journals, guidelines, conferences and textbooks [see Research tab]. He has also served as a Cancer Liaison Physician for the American College of Surgeons, Commission on Cancer. A member the American College of Surgeons, the Society for American Gastrointestinal & Endoscopic Surgeons, the Americas Hepato-Pancreato-Biliary Association, the International Hepato-Pancreato-Biliary Association, the Society for Surgical Oncology, the Society for Surgery of the Alimentary Tract, and the Pancreas Club, Dr. Cunningham offers world-class multidisciplinary and minimally invasive evaluation and treatment of pancreatic, biliary and liver diseases, both benign and malignant. LinkedIn https://www.linkedin.com/in/stevenccunningham. Dr. Cunningham is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Biliary Dyskinesia, Gallbladder Disease, Pancreatic Cancer, Gallbladder Removal, and Pancreaticoduodenectomy.

Henry Sun is an Interventional Cardiologist in Baltimore,, Maryland. Dr. Sun is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Coronary Heart Disease, Heart Attack, Apoplexy, Heart Bypass Surgery, and Pacemaker Implantation.

Arjun Vaid is a Gastroenterologist in Baltimore, Maryland. Dr. Vaid is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Jaundice, Irritable Bowel Syndrome (IBS), Hiccups, Colonoscopy, and Gastrectomy.

Marcelino Albuerne is a primary care provider, practicing in Family Medicine in Catonsville, Maryland. Dr. Albuerne is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Glycine Encephalopathy, Anemia, Familial Hypertension, Gastrostomy, and Endoscopy.

Neil Porter is a Neurologist in Baltimore, Maryland. Dr. Porter is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Myasthenia Gravis, Mononeuritis Multiplex, Multiple Mononeuropathy, Riboflavin Transporter Deficiency Neuronopathy, and Gastrostomy.

Jason Molitoris is a Radiologist and a Radiation Oncologist in Baltimore, Maryland. Dr. Molitoris is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Prostate Cancer, Adult Soft Tissue Sarcoma, Familial Prostate Cancer, Anal Cancer, and Gastrostomy.

Peter Jin is a Neurologist in Baltimore, Maryland. Dr. Jin is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Spinal and Bulbar Muscular Atrophy, Spinal Muscular Atrophy Type 3, Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's Disease), Spinal Muscular Atrophy (SMA), and Gastrostomy.

Lindsay Zilliox is a Neurologist in Baltimore, Maryland. Dr. Zilliox is rated as an Experienced provider by MediFind in Gastrostomy. Her top areas of expertise are Peripheral Neuropathy, Orthostatic Hypotension, Diabetic Neuropathy, Familial Dysautonomia, and Gastrostomy.

Debashish Bose is a Surgical Oncologist and a General Surgeon in Baltimore, Maryland. Dr. Bose is rated as an Experienced provider by MediFind in Gastrostomy. His top areas of expertise are Pancreatic Pseudocyst, Pancreatic Cancer, Familial Pancreatic Cancer, Pancreatectomy, and Small Bowel Resection. Dr. Bose is currently accepting new patients.

Christine Gourin, M.D. M.P.H., is a head and neck surgical oncologist and palliative medicine specialist who treats patients with head and neck tumors, including tumors of the skin, melanoma, oral cavity, larynx, oropharynx, neck, salivary glands, sinuses, and skull base. Dr. Gourin received her medical degree from the State University of New York-Health Science Center at Brooklyn/Downstate Medical Center. Dr. Gourin trained in General Surgery and Otolaryngology-Head and Neck Surgery at the University of Vermont, followed by a fellowship in Advanced Head and Neck Oncologic Surgery at the University of Pittsburgh and a fellowship in Hospice and Palliative Medicine at Johns Hopkins University. She has authored over 200 peer-reviewed journal articles, 24 book chapters and two books: Medical and Surgical Management of Thyroid and Parathyroid Diseases and The Johns Hopkins Patient Guide to Head and Neck Cancer. She is on the Editorial Board of The Laryngoscope and is a reviewer for numerous other head and neck surgery journals. Dr. Gourin is a nationally and internationally recognized expert in quality of care and outcomes with a lifelong interest in improved symptom management, communication, access to high-quality affordable care, and palliative medicine in head and neck cancer. She has an active head and neck surgical oncology practice and has been named to America’s Top Physicians and Best Doctors in America annually since 2005. She is the Director of the Johns Hopkins Head and Neck Cancer Supportive Care Clinic. Dr. Gourin is rated as an Advanced provider by MediFind in Gastrostomy. Her top areas of expertise are Laryngeal Cancer, Throat Cancer, Tongue Cancer, Laryngectomy, and Gastrostomy.

Dr. Harry Quon is an associate professor of radiation oncology and molecular radiation sciences at the Johns Hopkins University School of Medicine. He also holds appointments in oncology and in otolaryngology - head and neck surgery. His area of clinical expertise is radiation treatment for head and neck cancers. He serves as the co-director of the Johns Hopkins Head and Neck Cancer Multidisciplinary Clinic. Dr. Quon received his M.D. from the University of Toronto Institute of Medical Science. He completed his residency at the Princess Margaret Hospital in Ontario and performed a fellowship in radiation oncology at the Princess Margaret Hospital and the Beth Israel Medical Center. Make A Gift. Dr. Quon is rated as an Advanced provider by MediFind in Gastrostomy. His top areas of expertise are Laryngeal Cancer, Throat Cancer, Dry Mouth, Gastrostomy, and Prostatectomy.

Dr. J. Michael Collaco is a professor of pediatrics at the Johns Hopkins University School of Medicine. His clinical specialty is pediatric pulmonary medicine, including chronic lung disease of premature infants, lung disease in medically complex patients including ventilators and tracheostomies, hereditary hemorrhagic telangiectasia, aerodigestive disorders, and general pediatric pulmonary conditions. He sees patients inpatient and outpatient at Johns Hopkins (East Baltimore campus), inpatient and outpatient at Mount Washington Pediatric Hospital, and inpatient at Kennedy Krieger Institute. Dr. Collaco attended Yale University for undergraduate studies and received his M.D. and M.S. (Anatomy) from Case Western University School of Medicine in Cleveland, Ohio. He completed his pediatric residency, pediatric pulmonary fellowship, M.B.A., M.P.H., and Ph.D. (Clinical Epidemiology) at the Johns Hopkins University. Dr. Collaco joined the Johns Hopkins faculty in 2008. His primary research interest is in the epidemiology of pediatric respiratory diseases, with a focus on environmental risk factors for cystic fibrosis and bronchopulmonary dysplasia as well as a special interest in the effects of secondhand smoke and electronic cigarette emissions. He has published over 140 peer-reviewed articles. Dr. Collaco is a member of the Cystic Fibrosis Research Development Center and the Hereditary Hemorrhagic Telangiectasia Center of Excellence. He has been recognized by Johns Hopkins with the John C. Hume Scholarship, the Francis F. Schwentker Research Award, and the Robert Dyar Award. Dr. Collaco is a fellow of the American Academy of Pediatrics. Dr. Collaco is rated as an Advanced provider by MediFind in Gastrostomy. His top areas of expertise are Bronchopulmonary Dysplasia, Cystic Fibrosis, Pulmonary Hypertension, Pseudomonas Stutzeri Infections, and Gastrostomy.

Dr. Victor Urrutia serves as the medical director of the stroke service at The Johns Hopkins Hospital and director of the Sheikh Khalifa Stroke Institute. He focuses on the clinical aspects of cerebrovascular disease (stroke), specifically acute stroke therapy and prevention. Dr. Urrutia currently sees patients at the Stroke Prevention Clinic, located in the Johns Hopkins Outpatient Center in Baltimore on Wednesdays, and cares for patients in The Johns Hopkins Hospital's Brain Rescue Unit. Dr. Victor Urrutia received his medical degree from the University of Panama School of Medicine. He completed his neurology training at MCP Hahnemann University in Philadelphia, now Drexel University College of Medicine. After his residency training, he completed fellowship training in neurocritical care and acute stroke at Drexel University College of Medicine and became a faculty member in the neurocritical care and acute stroke division. He then returned to Panama for two years where he was the first to treat patients with IV thrombolytic therapy for acute stroke. Dr. Urrutia is rated as an Advanced provider by MediFind in Gastrostomy. His top areas of expertise are Stroke, Transient Ischemic Attack (TIA), Vertigo, Thrombectomy, and Gastrostomy.

Head and neck surgeon David Eisele specializes in surgery for malignant and benign tumors of the head and neck, with a focus on salivary gland neoplasms and disorders of the salivary glands that can be treated surgically. He is an expert in minimally invasive surgical approaches, including sialendoscopy. Salivary gland neoplasms and disorders are also the focus of Dr. Eisele’s research. He has published more than 300 research papers and edited multiple books related to head and neck surgery. Dr. Eisele earned a medical degree from Cornell University Medical College and completed residency training in general surgery and in otolaryngology–head and neck surgery at the University of Washington. From 2012 to 2025, he served as director of the Department of Otolaryngology–Head and Neck Surgery at the Johns Hopkins University School of Medicine. Dr. Eisele is rated as an Advanced provider by MediFind in Gastrostomy. His top areas of expertise are Salivary Duct Stones, Salivary Gland Tumors, Throat Cancer, Laryngectomy, and Gastrostomy.