Dr. Ryer is a board-certified and fellowship-trained vascular surgeon. His clinical interests include management of thoracic and abdominal aneurysms, carotid stenting and endarterectomy, stenting of the lower extremities and venous disease management. Dr. Ryer earned his medical degree from Temple University. He completed his residency at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and his fellowship in vascular surgery at Mayo Clinic, Rochester. Dr. Ryer is certified by the American Board of Surgery in surgery and vascular surgery. Dr. Ryer is rated as an Advanced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Abdominal Aortic Aneurysm (AAA), Thoracic Aortic Aneurysm, Peripheral Artery Disease, Aneurysm Repair, and Stent Placement.

Dr. Garvin is a board-certified and fellowship-trained vascular surgeon. His clinical and research interests include carotid artery disease, aortic aneurysmal disease and peripheral artery disease. He has extensive experience with carotid stenting, carotid surgery, aortic stenting and aortic surgery, and stenting and surgery of arteries in the lower extremities. He also provides vascular access for dialysis patients. Dr. Garvin earned his medical degree from Temple University. He completed his residency at Western Pennsylvania Hospital, and a fellowship in vascular surgery at the Milton S. Hershey Medical Center. Dr. Garvin is certified by the American Board of Surgery in surgery and vascular surgery. Dr. Garvin is rated as an Advanced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Abdominal Aortic Aneurysm (AAA), Thoracic Aortic Aneurysm, Peripheral Artery Disease, Aneurysm Repair, and Carotid Artery Surgery.

James R. Elmore, MD, is a vascular surgeon and chair of Vascular Surgery. Dr. Elmore obtained his medical degree from the University of Connecticut. He completed his surgery residency at Maine Medical Center and his vascular fellowship at Mayo Clinic in Rochester, Minn. Dr. Elmore is board certified in vascular surgery by the American Board of Surgery. He is a member of the American College of Surgeons, the Delaware Valley Vascular Society, the Eastern Vascular Society, the Vascular and Endovascular Surgery Society, the Society for Clinical Vascular Surgery and the Society for Vascular Surgery. Dr. Elmore has been recognized as a distinguished member of the Society for Vascular Surgery, a rare honor and distinction. He is past president of the Delaware Valley Vascular Society. Dr. Elmore’s clinical interests include carotid artery stents & carotid endarterectomy and was the principal investigator for CREST (a research trial investigating carotid stents). He has extensive experience with aortic aneurysm surgery and stents, and broad experience with leg revascularization with leg stents or bypass for peripheral arterial disease. Dr. Elmore is pleased to provide minimally invasive procedures for varicose veins for his patients at Geisinger. Stent placement for renal artery disease and mesenteric disease are also procedures he commonly performs. Dr. Elmore likes to treat all his patients as if they are his own family members. Every patient is treated as a VIP. He works hard to give them the most compassionate care possible. Dr. Elmore is rated as an Advanced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Abdominal Aortic Aneurysm (AAA), Thoracic Aortic Aneurysm, Arterial Insufficiency, Stent Placement, and Aneurysm Repair.

Gregory G. Salzler, MD, is a board-certified vascular surgeon. He provides care for women and men who need a wide range of vascular procedures, including treatment for blood clots, deep vein thrombosis (DVT), renal artery disease, stroke, vascular disease, carotid artery disease, peripheral arterial disease (PAD), thoracic aneurysms, abdominal aortic aneurysms, venous disease and varicose veins.|Dr. Salzler has a clinical interest in all aspects of vascular and endovascular surgery, including limb salvage, dialysis access and minimally invasive endovascular techniques.|Board-certified in general surgery and vascular surgery, Dr. Salzler earned his medical degree from Georgetown University in Washington D.C. He completed a general surgery residency at New York-Presbyterian Hospital/Weill Cornell Medical Center. He then completed a fellowship in vascular surgery at the University of Pittsburgh Medical Center.|Dr. Salzler is an active member of several organizations, including the American College of Surgeons, Delaware Valley Vascular Society, Eastern Vascular Society and Vascular and Endovascular Surgery Society. He is a Fellow of the Society for Vascular Surgery and serves as an associate professor of surgery at the Geisinger Commonwealth School of Medicine. Dr. Salzler is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Abdominal Aortic Aneurysm (AAA), Thoracic Aortic Aneurysm, Peripheral Artery Disease, Aneurysm Repair, and Stent Placement.

Jeremy Irvan, MD, is a board-certified and fellowship-trained vascular surgeon. He treats adults with peripheral artery disease, carotid artery disease, aortic aneurysmal disease and varicose veins. He also assists with maintenance of arterial venous fistula.|Dr. Irvan earned his medical degree from The University of Arkansas in Fayetteville. After medical school, he completed a residency at The University of Oklahoma College of Medicine in Oklahoma City. He followed that with a fellowship in vascular surgery at Geisinger Medical Center in Danville.|“I never expected to become a vascular surgeon,” he says. “I always thought I would be a family medicine doctor. It’s all I was exposed to growing up. However, when I completed my rotation in vascular surgery, I knew this was the path for me.”|Originally from rural southwest Arkansas, he came to Geisinger after matching into a vascular surgery fellowship. “I was so impressed with the department of vascular surgery and the beauty of central Pennsylvania,” he says. “When the opportunity to work at Geisinger Medical Center arose, I accepted.”|He adds, “I love my team here at Geisinger. We have a dynamic, talented, motivated group of vascular surgeons, vascular surgical fellows and residents, nurse practitioners, physician assistants, vascular lab technologists, nursing staff and medical students. We all love treating our patients and seeing them achieve better health.”|In his spare time, he enjoys golf, cycling and lifting weights. Dr. Irvan is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Arterial Insufficiency, Peripheral Artery Disease, Mesenteric Artery Ischemia, and End-Stage Renal Disease (ESRD).

Madian Yahya is a General Surgeon in Danville, Pennsylvania. Dr. Yahya is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. 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.

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 Peptic Ulcer. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Delirium, Small Bowel Resection, and Hernia Surgery.

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 Peptic Ulcer. His top areas of expertise are Familial Pancreatic Cancer, Pancreatic Cancer, Gastrointestinal Stromal Tumor, Pancreatectomy, and Splenectomy.

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 Peptic Ulcer. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Delirium, Hernia Surgery, and Hip Replacement.

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 Peptic Ulcer. His top areas of expertise are Obesity, Hiatal Hernia, Hernia, Gastric Bypass, and Endoscopy.

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 Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Juvenile Angiofibroma, Cellulitis, Gallstones, Choledocholithiasis, and Hernia 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 Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Hiatal Hernia, Obesity, Hernia, Gastric Bypass, and Endoscopy.

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 Peptic Ulcer. Her top areas of expertise are Ogilvie Syndrome, Hernia, Juvenile Angiofibroma, Gallbladder Disease, and Hernia Surgery.

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

As director of colorectal surgery, Chris Buzas, DO, specializes in treating patients with colon, rectal and anal cancers as well as inflammatory bowel disease (including Crohn’s disease and ulcerative colitis). He also provides care for people with diverticulitis, various rectal conditions, hemorrhoids and pelvic floor disorders.|He has clinical expertise in complex re-operative colorectal surgeries as well as robotic, laparoscopic and open procedures. His advanced training includes trans-anal excisions, neurostimulation for fecal incontinence and colonoscopies.|Dr. Buzas is passionate about making a difference in his patients’ lives. “The thing I love most about my job is the ability to work alongside a great team dedicated to solving problems,” he says. “I enjoy seeing our patients out in the community, knowing we were able to help improve their quality of life.”|Dr. Buzas has a strong commitment to giving back to his community and improving access to care. He previously served as president of the Keystone Chapter of the American College of Surgeons as well as on the Board of Trustees for the Pennsylvania Medical Society. Dr. Buzas has also helped standardize rectal cancer care throughout the country as part of the National Accreditation Program for Rectal Cancer.|Dr. Buzas received the Teacher of the Year Award from the surgical residents at Geisinger Medical Center. He was also recognized by the Pennsylvania Medical Society as one of their Top Physicians Under 40.|When not at work, Dr. Buzas enjoys spending time with his wife and three children at their lakeside cabin in northern Pennsylvania.|Video: more from Dr. Christopher Buzas, D.O. Dr. Buzas is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Lynch Syndrome, Hernia Surgery, and Ileostomy.

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 Peptic Ulcer. His top areas of expertise are Hiatal Hernia, Hernia, Obesity, Gastric Bypass, and Endoscopy.

Dr. Long is a board-certified and fellowship-trained colorectal surgeon. He obtained his medical degree from Virginia Commonwealth University and completed his residency at the same institute. Dr. Long completed his fellowship in colon and rectal surgery at Swedish Colon and Rectal Clinic. He is certified by the American Board of Colon and Rectal Surgery and the American Board of Surgery. Dr. Long is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Crohn's Disease, Ileostomy, and Colostomy.

Nina Neuhaus is a General Surgeon in Danville, Pennsylvania. Dr. Neuhaus is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. Her top areas of expertise are Ogilvie Syndrome, Chronic Subdural Hematoma, Subdural Hematoma, Hernia Surgery, and Hip Replacement.

Dr. Hoffman is a board-certified and fellowship-trained general surgeon. She attended the University of Pennsylvania School of Medicine, where she received her medical degree as well as completed her residency. Dr. Hoffman completed her fellowship at Washington University. She is certified by the American Board of Surgery. Dr. Hoffman is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. Her top areas of expertise are Ogilvie Syndrome, Colorectal Cancer, Lynch Syndrome, Colostomy, and Ureteroscopy.

Dr. Wertz is a board-certified general surgeon specializing in trauma critical care medicine. He attended the Philadelphia College of Osteopathic Medicine, where he received his medical degree. He completed his residency at William Beaumont Hospital. He is board-certified by the American Board of Anesthesiology in Neurocritical Care. Dr. Wertz is rated as an Experienced provider by MediFind in the treatment of Peptic Ulcer. His top areas of expertise are Chronic Subdural Hematoma, Ogilvie Syndrome, Subdural Hematoma, Hip Replacement, and Hernia Surgery.