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 a Distinguished provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Obesity, Malnutrition, Small Bowel Bacterial Overgrowth, Gastric Bypass, and Vagotomy.

Dr. Hosterman is a board-certified and fellowship-trained specialist in nutrition and weight management. Her clinical interests include adult and pediatric malnutrition and comprehensive weight management. Dr. Hosterman attended the Philadelphia College of Osteopathic Medicine, where she received her medical degree. She completed her internal medicine – pediatric residency and then her weight management and nutrition fellowship at Geisinger Medical Center. Dr. Hosterman is certified by the American Board of Internal Medicine, the American Board of Pediatrics, the American Board of Obesity Medicine and the American Board of Physician Nutrition Specialists. Dr. Hosterman is rated as a Distinguished provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Malnutrition, Short Bowel Syndrome, Small Bowel Bacterial Overgrowth, and Protein Deficiency.

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

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

Daniela Hangan is a primary care provider, practicing in Family Medicine in Danville, Pennsylvania. Dr. Hangan is rated as a Distinguished provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Malnutrition, Small Bowel Bacterial Overgrowth, Short Bowel Syndrome, and Obesity.

Susan Rasul is a primary care provider, practicing in Gastroenterologist in Danville, Pennsylvania. Dr. Rasul is rated as an Advanced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Malnutrition, Small Bowel Bacterial Overgrowth, Short Bowel Syndrome, and Obesity.

Christine Hanna is a primary care provider, practicing in Gastroenterologist in Danville, Pennsylvania. Dr. Hanna has been practicing medicine for over 10 years and is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Malnutrition, Obesity, Short Bowel Syndrome, and Small Bowel Bacterial Overgrowth.

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 Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Pancreatic Pseudocyst, Gastroesophageal Reflux Disease (GERD), Barrett Esophagus, Endoscopy, and Gastric Bypass.

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 Malnutrition. His top areas of expertise are Crohn's Disease, Angiodysplasia of the Colon, Swallowing Difficulty, Endoscopy, and Colonoscopy.

Justin Azar, MD, is a board-certified pediatrician specializing in pediatric critical care. He cares for patients with critical illness in the pediatric intensive care unit. Dr. Azar treats patients with multi-system organ failure and traumatic injuries that need surgery. He also provides post-operative care.|Dr. Azar earned his medical degree from George Washington University in Washington, D.C. He completed his residency at Children’s National Medical Center in Washington, D.C., where he served as chief resident. He followed that with a fellowship in pediatric critical care at Children’s Hospital of Pittsburgh. Additionally, Dr. Azar completed international clinical externships caring for children in Ecuador and Malawi.|He’s an active member of several professional organizations including The American Academy of Pediatrics, Society of Critical Care Medicine and Children’s Hospital Association.|Dr. Azar is an accomplished researcher. He’s published several peer-reviewed manuscripts and abstracts. Dr. Azar is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Cerebral Hypoxia, Malnutrition, and Traumatic Brain Injury.

James Kamau is a primary care provider, practicing in Hematologist Oncology in Danville, Pennsylvania. Dr. Kamau has been practicing medicine for over 10 years and is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Protein S Deficiency, Deep Vein Thrombosis, Mesenteric Venous Thrombosis, and Pulmonary Embolism. Dr. Kamau is currently accepting new patients.

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 Malnutrition. His top areas of expertise are Nonalcoholic Steatohepatitis (NASH), Benign Esophageal Stricture, Lower Esophageal Ring, Endoscopy, and Colonoscopy.

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 Malnutrition. His top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Lynch Syndrome, Hernia Surgery, and Ileostomy.

Dr. Dinko is a board-certified physician specializing in family medicine. He attended The Commonwealth Medical College, where he received his medical degree, and completed his residency at Washington Hospital. Dr. Dinko is certified by the American Board of Family Medicine.|Outside of work, Dr. Dinko enjoys sports. He also likes spending time outdoors, particularly hiking. Dr. Dinko is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Nephrosclerosis, and Renovascular Hypertension.

Dr. Notz is a board-certified and fellowship-trained specialist in pediatric complex care. Her clinical interests include improving quality of care for families and children with complex medical needs. Dr. Notz earned her medical degree from Philadelphia College of Osteopathic Medicine, and completed her residency at Geisinger Medical Center. Dr. Notz is certified by the American Board of Internal Medicine, the American Board of Pediatrics, and the American Osteopathic Board of Pediatrics. When she isn't at work, Dr. Notz enjoys spending time with her family, exercising, baking and reading. She shares her home with a cat, Bailey, and dog, Abby. Dr. Notz is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Microcephaly, Koolen De Vries Syndrome, Early Infantile Epileptic Encephalopathy, and CHARGE Syndrome.

Dr. Beichner is a board-eligible physician specializing in family medicine. Her clinical interests include hormonal treatment for adult transgender patients (18 years old and up). She attended Jefferson Medical College of Thomas Jefferson University, where she earned her medical degree. Dr. Beichner completed her residency at Washington Hospital. Dr. Beichner is rated as an Experienced provider by MediFind in the treatment of Malnutrition. Her top areas of expertise are Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Acquired Agranulocytosis, and Hypertension.

Thomas Morland, MD, is a board-certified physician specializing in internal medicine. Dr. Morland has a special interest in preventing chronic illness through lifestyle changes.|“I enjoy working with patients on intensive prevention and placing lifestyle first,” he says. “I find that by incorporating whole foods into their diets, getting more exercise, improving sleep and managing stress, patients can stabilize or even reverse chronic medical conditions and decrease their reliance on medications.”|Dr. Morland attended Yale University, where he received his medical degree, and completed his residency at the Hospital of the University of Pennsylvania. Dr. Morland is certified by the American Board of Internal Medicine and the American College of Lifestyle Medicine.|“The best part of my job is seeing a patient exceed expectations,” he says. “It's great to provide the ‘standard of care,’ but when a patient takes their health into their own hands and collaborates with their healthcare team, we can see patients achieve things they never thought possible.”|Dr. Morland enjoys spending time with his wife and three children, playing the string bass and piano, hiking, playing soccer and swimming. His family has an organic garden in their backyard where “we try to put our own advice into practice,” he says. Dr. Morland is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Pulmonary Embolism, Shwartzman Phenomenon, and Coronary Artery Bypass Graft (CABG).

Mark Lentz, MD, is an internal medicine physician who provides comprehensive care for adults. He’s passionate about supporting his patients’ long-term health and well-being through preventive care, chronic illness management and timely treatment of new or acute conditions — large or small.|With decades of experience, Dr. Lentz has developed deep clinical expertise in managing a wide range of adult health concerns, particularly chronic conditions such as arthritis, diabetes and heart disease. He also has a special interest in helping patients manage restless legs syndrome.|Originally from Indiana, Pennsylvania, Dr. Lentz earned his medical degree from Thomas Jefferson University and completed his residency at Allegheny General Hospital. He is a Fellow of the American College of Physicians, a recognition of his dedication to delivering the highest standard of care.|Dr. Lentz is known for his thoughtful, patient-first approach and his genuine desire to make a meaningful difference in the lives of those he serves. Dr. Lentz is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Anaplastic Thyroid Cancer, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Glutaric Acidemia Type 2.

Osama Shaheen, MD, is a general surgeon specializing in bariatric and foregut surgery. He performs a variety of surgical treatments for adults, including Nissen/Toupet fundoplication, Heller myotomy, laparoscopic hiatal hernia repair, LINX procedure, Roux-en-Y gastric bypass (RYGB), gastric sleeve, duodenal switch, single anastomosis duodeno–ileal bypass with sleeve gastrectomy, (SADI-S) and revisional bariatric surgery.|Dr. Shaheen attended Damascus University in Damascus, Syria, where he earned his medical degree. After medical school, he completed a residency at Damascus University Hospital. He followed that with a fellowship in multi-organ abdominal transplant surgery and a residency in general surgery, both at Thomas Jefferson University Hospital in Philadelphia. He also completed a fellowship in bariatric and advanced minimally invasive surgery with the Advanced Laparoscopic Surgery Associates (ALSA) Medical Group in Fresno, California.|He’s received several Excellence in Teaching Awards during his residency and fellowships.|He and his wife Latifa moved to the area in 2023. “I decided to move to Geisinger, a healthcare system known for its superior quality,” he notes. Dr. Shaheen is rated as an Experienced provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Short Bowel Syndrome, Malnutrition, Obesity, Gastrectomy, and Gastric Bypass.

Thomas Hood, MD, practices family medicine at Geisinger 65 Forward Health Center in Shamokin, Pa. His clinical interests and services include preventive care, cryotherapy, trigger finger injections and joint injections.|After completing his undergraduate studies in biology at Wilkes University in Wilkes-Barre, Dr. Hood earned his medical degree from Thomas Jefferson University in Philadelphia. He completed his residency at Geisinger Medical Center.|Dr. Hood is certified by the American Board of Family Medicine in family medicine. Before 65 Forward, he worked for nearly 22 years at the Geisinger Kulpmont Clinic, where, as site lead, he designed projects to improve patient care and served as a mentor to young providers. He was also the clinic’s liaison with Geisinger Shamokin Area Community Hospital.|Joining 65 Forward will allow Dr. Hood to focus on keeping older area residents healthy. “I hope to continue serving the local community and provide the best care possible,” he says.|Video: more from Dr. Thomas Hood, M.D. Dr. Hood is rated as a Distinguished provider by MediFind in the treatment of Malnutrition. His top areas of expertise are Malnutrition, Maturity Onset Diabetes of the Young, Familial Colorectal Cancer, and Type 2 Diabetes (T2D).