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 a Distinguished provider by MediFind in the treatment of Gallstones. His top areas of expertise are Barrett Esophagus, Gallbladder Disease, Watermelon Stomach, Endoscopy, and Gallbladder Removal.

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 the treatment of Gallstones. His top areas of expertise are Gallbladder Disease, Benign Esophageal Stricture, Cholecystitis, Endoscopy, and Gallbladder Removal.

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 the treatment of Gallstones. His top areas of expertise are Pancreatic Pseudocyst, Gastroesophageal Reflux Disease (GERD), Barrett Esophagus, Endoscopy, and Gastric Bypass.

Matthew Souder, MD, is a board-certified general surgeon. He earned his medical degree from St. George’s University School of Medicine in Grenada. After medical school, he completed a residency in general surgery at PinnacleHealth in Harrisburg.|During his undergraduate training, Dr. Souder completed several research projects on fetal alcohol syndrome and other topics.|He’s a native of Lewisburg. Dr. Souder is rated as an Advanced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Juvenile Angiofibroma, Cellulitis, Gallstones, Choledocholithiasis, and Hernia Surgery.

Dr. Shellenberger is a board-certified and fellowship-trained gastroenterologist. His clinical interests include postgraduate medical education, esophageal motility and other GI laboratory procedures. Dr. Shellenberger earned his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his residency and his fellowship in gastroenterology at Geisinger Medical Center. Dr. Shellenberger is certified by the American Board of Internal Medicine in internal medicine and gastroenterology. Dr. Shellenberger is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Crohn's Disease, Angiodysplasia of the Colon, Swallowing Difficulty, Endoscopy, and Colonoscopy.

Dr. Jaap is a board-certified general surgeon. She attended Wright State University, where she earned her medical degree. Dr. Jaap completed her residency at Geisinger Medical Center. She is certified by the American Board of Surgery. Dr. Jaap is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Ogilvie Syndrome, Hernia, Juvenile Angiofibroma, Gallbladder Disease, and Hernia Surgery.

Dr. Widom is a board-certified and fellowship-trained general surgeon subspecializing in trauma. His clinical interests include acute care surgery and emergency general surgery. Dr. Widom attended the University of Maryland, where he received his medical degree, and completed his residency at Robert Wood Johnson University Hospital. He completed his fellowship in surgical critical care at the University of Maryland. Dr. Widom is certified by the American Board of Surgery in surgical critical care. Dr. Widom is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Delirium, Small Bowel Resection, and Hernia Surgery.

Danial Shaikh, MD, is an accomplished interventional gastroenterologist specializing in luminal interventions and advanced therapeutic endoscopy. He completed his medical education at Ziauddin University in Karachi, Pakistan, followed by an internal medicine residency and a gastroenterology fellowship at BronxCare Health System, Icahn School of Medicine at Mount Sinai in New York, where he also served as chief resident and chief fellow.|Dr. Shaikh further honed his skills during an advanced endoscopy fellowship at Moffitt Cancer Center, University of South Florida, and later at the Mayo Clinic in Arizona, where he focused on third space endoscopy. His board certifications include gastroenterology and internal medicine.|Fluent in both English and Urdu, Dr. Shaikh has clinical and research interests primarily in third space endoscopy and gastrointestinal oncology. His dedication to advancing the field of endoscopy through patient care, research and education has established him as a respected figure in his specialty. Dr. Shaikh is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Toxic Megacolon, Saddle Pulmonary Embolism, Ascites, Endoscopy, and Colonoscopy.

Dr. Foernges is a board-certified and fellowship-trained specialist in trauma critical care. His clinical interests include trauma surgery, gastrointestinal surgery and necrotizing soft tissue infection. Dr. Foernges graduated from Universidade Federal de Ciências da Saúde de Porto Alegre Faculdade de Medicina in Brazil, where he earned his medical degree. He completed his residency at Geisinger Medical Center, and his fellowship at MedStar Washington Hospital Center. Dr. Foernges is certified by the American Board of Surgery in surgical critical care. He speaks English, Portuguese and Spanish. Dr. Foernges is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Delirium, Hernia Surgery, and Hip Replacement.

Madian Yahya is a General Surgeon in Danville, Pennsylvania. Dr. Yahya is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Median Arcuate Ligament Syndrome (MALS), Ogilvie Syndrome, Chronic Subdural Hematoma, Gallbladder Removal, and Hernia Surgery. Dr. Yahya is currently accepting new patients.

Matthew Factor is a General Surgeon in Danville, Pennsylvania. Dr. Factor is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Delirium, Hip Replacement, and Gastrostomy.

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 an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Hiatal Hernia, Hernia, Obesity, Gastric Bypass, and Endoscopy.

Dr. Torres is the chair of the Geisinger Surgery Institute and is a board-certified and fellowship-trained general surgeon subspecializing in trauma. Her clinical interests include trauma surgery, acute care surgery and surgical critical care. Her research interests include trauma systems and performance improvement. Dr. Torres earned her medical degree at Drexel University. She completed her residency in general surgery at Temple University Hospital, and her fellowship in surgical critical care at the University of Maryland Medical Center. Dr. Torres is certified by the American Board of Surgery in surgical critical care. Dr. Torres is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Gallbladder Disease, Delirium, Chronic Subdural Hematoma, Gallbladder Removal, and Hernia Surgery.

Dr. Rapp is a board-certified and fellowship-trained general surgeon subspecializing in trauma. Her clinical interests include trauma surgery, acute care surgery and surgical critical care. Dr. Rapp pursued her medical education at Temple University. She completed a residency in general surgery at the Geisinger Medical Center and a fellowship in critical care surgery at the University of Pittsburgh Medical Center, Pittsburgh. Dr. Rapp is certified by the American Board of Surgery in surgical critical care. Dr. Rapp is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Delirium, Gastrostomy, and Small Bowel Resection.

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 Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Obesity, Hiatal Hernia, Hernia, Gastric Bypass, and Endoscopy.

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 Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Hiatal Hernia, Obesity, Hernia, Gastric Bypass, and Endoscopy.

Anil Kotru, MD, is a transplant and hepatobiliary surgeon specializing in liver and kidney transplantation, as well as pediatric kidney transplants. He performs a variety of surgical procedures including gallbladder removal, liver resection, peritoneal dialysis, catheter insertion and removal, vascular access and nephrectomies.|Dr. Kotru currently leads the pediatric kidney transplant program and serves as the director of quality for transplants at Geisinger. He has been instrumental in the development of the liver transplant program at Geisinger Medical Center. He gained international attention for his groundbreaking work on the link between patient expectations and clinical outcomes in transplant surgery and is widely sought after for his expertise in new models for healthcare payments and delivery, physician engagement and leadership.|Dr. Kotru earned his medical degree from Indira Gandhi Medical College in Shimla, India. He completed his residency in general surgery at St. James’ University Hospital in Leeds, United Kingdom, followed by a fellowship in multiorgan transplant at Washington University in Saint Louis.|Dr. Kotru is a member of the patients’ affairs committee of the United Network for Organ Sharing and has completed the American Society of Transplant Surgeons’ leadership program.|He is a Fellow of the Royal College of Surgeons of England and Edinburgh and the American College of Surgeons.|In 2019, Dr. Kotru was selected for the prestigious Baldrige Performance Excellence Program in recognition of his leadership and contributions to transplant research.|Dr. Kotru is an accomplished researcher and author. He has published numerous papers, book chapters and scientific articles and sits on the review boards for leading journals in surgery and transplantation. He serves as clinical professor of surgery at the Geisinger Commonwealth School of Medicine in Scranton. Dr. Kotru is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Chronic Antibody-Mediated Rejection, End-Stage Renal Disease (ESRD), Polycystic Kidney Disease, Kidney Transplant, and Simultaneous Pancreas Kidney Transplant.

Rouenne Seeley, DO, is a board-certified and fellowship-trained gastroenterologist, also known as a GI doctor.|Dr. Seeley earned her medical degree from the Philadelphia College of Osteopathic Medicine. She completed her residency in internal medicine and her fellowship in gastroenterology at Rowan University in New Jersey. She speaks both English and Tagalog.|Dr. Seeley is certified by the American Osteopathic Board of Internal Medicine. Dr. Seeley is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Familial Adenomatous Polyposis, Esophagitis, Barrett Esophagus, Endoscopy, and Colonoscopy.

Dr. Blansfield is a board-certified, fellowship-trained general surgeon specializing in surgical oncology. His clinical interests include pancreatic surgery, melanoma, endocrine surgery, esophageal cancer and minimally invasive surgery. His research interests include pancreatic cancer, melanoma and outcomes research. Dr. Blansfield earned his medical degree from Georgetown University. He completed his residency at Abington Memorial Hospital and his fellowship in surgical oncology at the National Institutes of Health Center for Cancer Research. Dr. Blansfield is certified by the American Board of Surgery. Dr. Blansfield is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Familial Pancreatic Cancer, Pancreatic Cancer, Gastrointestinal Stromal Tumor, Pancreatectomy, and Splenectomy.

Amitpal Singh Johal, MD, is a board-certified and fellowship-trained gastroenterologist, also known as a GI doctor. He has a special interest in endoscopic ultrasound, a minimally invasive procedure used to evaluate and diagnose digestive diseases.|Dr. Johal earned his medical degree from the Medical College of Wisconsin. He completed his residency in internal medicine at University Hospitals Case Medical Center in Cleveland and his fellowship in gastroenterology at Geisinger Medical Center.|Dr. Johal is certified by the American Board of Internal Medicine in gastroenterology. Dr. Johal is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Nonalcoholic Steatohepatitis (NASH), Benign Esophageal Stricture, Lower Esophageal Ring, Endoscopy, and Colonoscopy.