The 20 Best Gastric Bypass Doctors near Danville, PA
Find the Experts and Specialists who perform Gastric Bypass
Geisinger Medical Center - General Surgery
Anthony T. Petrick, MD, FACS, FASMBS, is a board-certified general surgeon specializing in esophageal and bariatric surgery. Dr. Petrick performs a number of advanced and specialized surgical procedures including advanced endoscopy, revisional bariatric surgery, laparoscopic gastric band (or “lap band”), gastric bypass, biliopancreatic diversion with duodenal switch and gastric sleeve. He also treats people for various conditions affecting the stomach and gastrointestinal (GI) system, including hiatal and paraesophageal hernia, achalasia and acid reflux (GERD).|Board-certified in general surgery, Dr. Petrick earned his medical degree from Georgetown University in Washington, D.C. He completed general surgery residency at Georgetown University Medical Center in Washington, D.C. He then completed a fellowships in Surgical Oncology at and Beth Israel Deaconess Medical Center in Boston and in Bariatric and Foregut surgery at the University of Pittsburgh Medical Center.|For the past 18 years, Dr. Petrick served as program director for the Geisinger bariatric and foregut surgical fellowship. He now serves as associate program director, acting as a mentor to bariatric surgery fellows. Dr. Petrick has a strong commitment to research in bariatric and foregut surgery and has authored more than 100 articles. Currently, he serves as chief quality officer for inpatient services at Geisinger and Director of the Division of Bariatric and Foregut surgery.|Dr. Petrick is an active member of the Society of Gastrointestinal and Endoscopic Surgeons and a fellow of the American College of Surgeons and American Society of Metabolic and Bariatric Surgeons. He chairs to Data and Quality Committee for the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program and also serves as an editorial board member for the journal Surgical and Obesity-Related Diseases and a columnist for Bariatric Times.|In his free time, Dr. Petrick serves on the board of education at St. Joseph School in Danville. He also coaches the Susquehanna Valley Stampede varsity and junior varsity ice hockey teams.|Clinical Focus: Bariatric Surgery|If you’re a provider who’d like to refer a patient, call our 24/7 referral line at 800-332-8901 or visit www.emr-link.com. Dr. Petrick is rated as an Elite provider by MediFind in Gastric Bypass. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Obesity, Hiatal Hernia, Hernia, Gastric Bypass, and Endoscopy. Dr. Petrick is currently accepting new patients.
Geisinger Medical Center - GI Nutrition
Dr. Still is a board-certified and fellowship-trained specialist in nutrition and weight management. His clinical and research interests include malnutrition and comprehensive weight management. Dr. Still obtained his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his residency and a fellowship in clinical nutrition at Geisinger Medical Center. Dr. Still is certified by the American Board of Internal Medicine.|Are weight loss medications right for you? Learn more from Dr. Still. Dr. Still is rated as an Elite provider by MediFind in Gastric Bypass. He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Obesity, Malnutrition, Small Bowel Bacterial Overgrowth, Gastric Bypass, and Vagotomy. Dr. Still is board certified in The American Board Of Internal Medicine.
Geisinger Medical Center - General Surgery
David M. Parker, MD, FACS, FASMBS, is a board-certified general surgeon specializing in bariatric surgery for both adolescents and adults. Dr. Parker performs several advanced and specialized surgical procedures, including gastric bypass, biliopancreatic diversion with duodenal switch, revisional bariatric surgery, laparoscopic gastric band (or “lap band”) and gastric sleeve. He also provides care for various conditions affecting the stomach and gastrointestinal (GI) system, including hiatal hernia, paraesophageal hernia, achalasia and acid reflux.|He has a clinical interest in minimally invasive laparoscopic and robotic surgery.|Board-certified in general surgery, Dr. Parker earned his medical degree from West Virginia University in Morgantown. He completed a general surgery residency at the Dwight D. Eisenhower Army Medical Center in Fort Gordon, GA, followed by a fellowship in bariatric and foregut surgery at Geisinger Medical Center in Danville.|While in medical school, he received the Presidential Award for Excellence in Scholarship. During his fellowship, he received the SAGES Award for best fellow presentation.|Dr. Parker serves as program director for the Geisinger bariatric and foregut surgical fellowship. He has a strong commitment to research in bariatric and foregut surgery and has authored more than 24 published articles.|He is an active member of the Society of Gastrointestinal and Endoscopic Surgeons and a fellow of the American College of Surgeons and American Society of Metabolic and Bariatric Surgeons.|Dr. Parker has served in the United States Army and continues to serve as a lieutenant colonel in the United States Army Reserve. He is also a football enthusiast, rooting for the West Virginia Mountaineers in his free time. Dr. Parker is rated as a Distinguished provider by MediFind in Gastric Bypass. He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses Hiatal Hernia, Hernia, Obesity, Gastric Bypass, and Endoscopy. Dr. Parker is currently accepting new patients.
Geisinger Medical Center - General Surgery
Vladan Obradovic, MD, is a general surgeon specializing in bariatric surgery. Dr. Obradovic performs a number of advanced and specialized weight loss surgery procedures, including biliopancreatic diversion with duodenal switch, advanced endoscopy, revisional bariatric surgery, foregut surgery, laparoscopic gastric band (or “lap band”), gastric bypass and gastric sleeve.|Dr. Obradovic has a clinical interest in minimally invasive and robotic surgery.|Dr. Obradovic earned his medical degree from the University of Belgrade School of Medicine in Belgrade, Serbia. He completed residencies in general surgery at the Belgrade School of Medicine, and Health Centre Krusevac in Krusevac, Serbia, and digestive system and hepatobiliary surgery at the University Clinical Center of Belgrade. He then completed general surgery residency and fellowship in bariatric surgery at Geisinger Medical Center in Danville and a certification in robotic assisted surgery at Intuitive Surgical Headquarters in Sunnyvale, CA.|A resident of Danville, Dr. Obradovic is committed to serving his community by giving the best care he possibly can. He was inspired to pursue a career in medicine by his father, who was a physician.|In his spare time, he enjoys spending time with his family and friends and walking his dog. Dr. Obradovic is rated as an Advanced provider by MediFind in Gastric Bypass. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Hiatal Hernia, Obesity, Hernia, Gastric Bypass, and Endoscopy. Dr. Obradovic is currently accepting new patients.
Geisinger Medical Center - Gastroenterology
Harshit S. Khara, MD, is an Interventional Gastroenterologist based at Geisinger Medical Center in Danville, PA.|Dr. Khara is an Associate Professor of Medicine at the Geisinger Commonwealth School of Medicine. He serves as the Director of Endoscopy; System Director of Interventional Endoscopy, Director of Endoscopic and Translational Research; Director of the Clinical Use Evaluation Committee; and System Director of Quality & Innovation. He is also the Research Director and Core faculty for the Gastroenterology Fellowship Program, as well as the Program Director for the Advanced Therapeutic Endoscopy Fellowship Program at the Center for Advanced Therapeutic Endoscopy at Geisinger, participating in the training and mentoring of advanced endoscopy and general gastroenterology fellows. Dr. Khara is also the Director of the National Pancreas Foundation Center at Geisinger.|He is involved in multi-center clinical research and quality improvement projects. Dr. Khara's clinical and research interests are in the field of interventional endoscopic ultrasound, ERCP, Barrett’s esophagus, third space endoscopy, endoscopic treatments for GERD, interventional EndoHepatology, and bariatric interventional endoscopy.|Dr. Khara earned his medical degree from Seth G.S. Medical College & K.E.M. Hospital in India then completed his Internal Medicine Residency at Drexel University College of Medicine-Saint Peter's University Hospital. He completed a Fellowship in Transplant Hepatology at the University of Nebraska Medical Center, a Fellowship in Gastroenterology at Yale University School of Medicine-Norwalk Hospital and a Fellowship in Advanced Therapeutic Endoscopy at Geisinger Medical Center.|Dr. Khara is certified in Gastroenterology by the American Board of Internal Medicine. Dr. Khara is rated as an Advanced provider by MediFind in Gastric Bypass. He is also highly rated in 27 other conditions, according to our data. His clinical expertise encompasses Pancreatic Pseudocyst, Gastroesophageal Reflux Disease (GERD), Barrett Esophagus, Endoscopy, and Gastric Bypass. Dr. Khara is currently accepting new patients.
Geisinger Medical Center - Gastroenterology
Dr. Diehl is a board-certified and fellowship-trained gastroenterologist. His clinical interests include endoscopic ultrasound, endoscopic retrograde cholangiopancreatography (ERCP) and innovative advanced therapeutic endoscopy. Dr. Diehl obtained his medical degree from the University of California, Los Angeles. He completed his residency at Harbor-UCLA Medical Center and his fellowships in gastroenterology at the University of California, San Francisco Medical Center and the University of California, Los Angeles Medical Center. Dr. Diehl is certified by the American Board of Internal Medicine. In his free time, Dr. Diehl enjoys spending time with his family and exercising, particularly swimming. He also has an appreciation for old cars. Dr. Diehl is rated as an Advanced provider by MediFind in Gastric Bypass. He is also highly rated in 27 other conditions, according to our data. His clinical expertise encompasses Barrett Esophagus, Gallbladder Disease, Watermelon Stomach, Endoscopy, and Gallbladder Removal. Dr. Diehl is board certified in The American Board Of Internal Medicine.
GMC Gastroenterology/Nutrition
Dr. Confer is a board-certified and fellowship-trained gastroenterologist. His clinical interests include endoscopic ultrasound and endoscopic retrograde cholangiopancreatography (ERCP). Dr. Confer attended the Lake Erie College of Osteopathic Medicine, where he received his medical degree. He completed his residency, a fellowship in gastroenterology and hepatology, and a fellowship in advanced therapeutic endoscopy at the Cleveland Clinic Foundation. Dr. Confer is certified by the American Board of Internal Medicine in gastroenterology. Dr. Confer is rated as an Advanced provider by MediFind in Gastric Bypass. He is also highly rated in 15 other conditions, according to our data. His clinical expertise encompasses Gallbladder Disease, Benign Esophageal Stricture, Cholecystitis, Endoscopy, and Gallbladder Removal. Dr. Confer is board certified in The American Board Of Internal Medicine In Gastroenterology. Dr. Confer is currently accepting new patients.
GMC General Diagnostic Radiology
Dr. Collins is a board-certified radiologist. He earned his medical degree from Marshall University, and completed his residency at Geisinger Medical Center. Dr. Collins is certified by the American Board of Radiology. Dr. Collins is rated as an Experienced provider by MediFind in Gastric Bypass. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Lung Nodules, Lymphofollicular Hyperplasia, Gastroenteropancreatic Neuroendocrine Tumor (GEP-NET), Neuroendocrine Tumor, and Gastric Bypass. Dr. Collins is board certified in The American Board Of Radiology.
Geisinger At Home - Central Region
Halle Ellison, MD, is a dually trained general surgeon and palliative care physician. Board-certified in general surgery, Dr. Ellison is focused on improving the quality of life for those she treats. She also specializes in providing end-of-life care for adults with terminal illnesses, attending to their emotional and physical well-being and helping to manage their symptoms. Dr. Ellison also offers guidance and support to her patients’ families.|She has a clinical interest in end of life care, medical education and improving healthcare delivery.|Dr. Ellison earned her medical degree from Ross University School of Medicine in Dominica. She completed her residency in general surgery and a fellowship in palliative medicine, both at Geisinger Medical Center in Danville.|In 2018, Dr. Ellison was awarded the Top Patient’s Experience Clinician Award for her dedication to providing compassionate care to her patients and their families. Dr. Ellison is rated as an Experienced provider by MediFind in Gastric Bypass. Her clinical expertise encompasses Gallstones, Choledocholithiasis, Gallbladder Disease, Gastroesophageal Reflux Disease (GERD), and Gastric Bypass.
GMC General Diagnostic Radiology
Romeo Laroya is a Radiologist practicing medicine in Danville, Pennsylvania. Dr. Laroya is rated as an Experienced provider by MediFind in Gastric Bypass. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Mantle Cell Lymphoma (MCL), Ureterocele, Boils, Carbuncle, and Gastric Bypass.
Geisinger Danville - General Internal Medicine
David Rolston, MD, is chair of the Department of Medicine Specialties for the Medicine Institute and director of the Division of General Internal Medicine at Geisinger Medical Center in Danville.|Dr. Rolston received his medical training and degree at the Christian Medical College, Vellore, University of Madras, India. He completed his residency at Hahnemann University Hospital in Philadelphia, and was chief medical resident at Hahnemann and at Crozer Chester Medical Center in Pennsylvania. He was elected to the Alpha Omega Alpha Honor Medical Society. After his residency, he was an attending physician and codirector of the internal medicine residency program at Graduate Hospital in Philadelphia. Dr. Rolston then became a staff physician at the Cleveland Clinic, Cleveland, Ohio, where he served as director of the Internal Medicine A91 Clinic, associate program director of the residency program in internal medicine, director of the physical diagnosis curriculum at the Cleveland Clinic Lerner College of Medicine and deputy editor of the Cleveland Clinic Journal of Medicine. He served as treasurer/secretary of the Ohio branch of the American College of Physicians. At Geisinger, he serves on several institutional committees and is part of the governing body for MyCode®.|Dr. Rolston is an editor and reviewer for national and international scientific journals and has published more than 150 manuscripts, abstracts and book chapters. He was the recipient of the prestigious Wellcome Trust Fellowship and has received numerous awards for research and teaching. He has been selected for Best Doctors in America.|Dr. Rolston’s areas of clinical interest include taking care of patients with complex medical problems. His research interests include intestinal water and electrolyte transport, intestinal-related infectious diseases and clinical and basic research as it relates to obesity. Dr. Rolston is rated as an Experienced provider by MediFind in Gastric Bypass. His clinical expertise encompasses Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Spinal Muscular Atrophy (SMA), Spinal Muscular Atrophy Type 3, and Gastric Bypass.
Voranaddha Vacharathit is a General Surgeon practicing medicine in Danville, Pennsylvania. Dr. Vacharathit is rated as an Experienced provider by MediFind in Gastric Bypass. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Hernia, Gastroesophageal Reflux Disease (GERD), Congenital Diaphragmatic Hernia, Gallbladder Removal, and Gastric Bypass.
Select Specialty Hospital-Danville
Tossapol Kerdsirichairat is a Gastroenterologist practicing medicine in Danville, Pennsylvania. Dr. Kerdsirichairat is rated as an Experienced provider by MediFind in Gastric Bypass. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Sclerosing Mesenteritis, Hereditary Pancreatitis, Acute Pancreatitis, Endoscopy, and Vagotomy.
WellSpan Bariatric Surgery In Lewisburg
Jon Gabrielsen is a General Surgeon and a Bariatric Medicine provider practicing medicine in Lewisburg, Pennsylvania. He has been practicing medicine for over 28 years. Dr. Gabrielsen is rated as a Distinguished provider by MediFind in Gastric Bypass. He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses Hiatal Hernia, Hernia, Achalasia, Gastric Bypass, and Endoscopy. Dr. Gabrielsen is currently accepting new patients.
Last Updated: 04/28/2026










