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 Small Bowel Bacterial Overgrowth. 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 Small Bowel Bacterial Overgrowth. Her top areas of expertise are Malnutrition, Short Bowel Syndrome, Small Bowel Bacterial Overgrowth, and Protein Deficiency.

Dr. DuBartell is a board-certified physician specializing in family medicine. His clinical interests include heart failure, diabetes, chronic obstructive pulmonary disease, behavioral health and pediatric and adolescent care. Dr. DuBartell attended the State University of New York, Buffalo, where he received his medical degree, and completed his residency at Middlesex Hospital, Middletown. He is certified by the American Board of Family Medicine in family medicine. Dr. Dubartell is rated as an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. His top areas of expertise are Chronic Lymphocytic Leukemia (CLL), Osteoarthritis, Breast Cancer, and Maturity Onset Diabetes of the Young.

Dr. Kraynak-Appel is a board-certified physician specializing in family medicine. She attended Philadelphia College of Osteopathic Medicine, where she earned her medical degree. She completed her residency at Williamsport Hospital and Medical Center. Dr. Kraynak-Appel is certified by the American Osteopathic Board of Family Physicians. Dr. Kraynak is rated as an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. Her top areas of expertise are Postmenopausal Osteoporosis, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Hypothyroidism.

Dr. Ashton is a board-certified physician specializing in family medicine. His clinical interests include preventive care and performance improvement. Dr. Ashton obtained his medical degree from the University of Pittsburgh. He completed his residency at Thomas Jefferson University Hospital. He is certified by the American Board of Family Medicine. Dr. Ashton is rated as an Advanced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. His top areas of expertise are HIV/AIDS, Maturity Onset Diabetes of the Young, Myelitis, and AIDS Dysmorphic Syndrome.

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 Small Bowel Bacterial Overgrowth. His top areas of expertise are Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Nephrosclerosis, and Renovascular Hypertension.

Dr. Sundaresan is a board-certified physician specializing in pediatrics and internal medicine. Her clinical interests include preventive care and chronic disease management. Dr. Sundaresan attended Christian Medical College, Vellore, where she earned her degree in medicine. She completed her residency at Geisinger Medical Center. She is certified by the American Board of Pediatrics and by the American Board of Internal Medicine. Dr. Sundaresan is rated as an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. Her top areas of expertise are Sinusitis, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Relapsing Multiple Sclerosis (RMS).

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 Small Bowel Bacterial Overgrowth. Her top areas of expertise are Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Acquired Agranulocytosis, and Hypertension.

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 Small Bowel Bacterial Overgrowth. 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 Small Bowel Bacterial Overgrowth. 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 Small Bowel Bacterial Overgrowth. Her top areas of expertise are Malnutrition, Obesity, Short Bowel Syndrome, and Small Bowel Bacterial Overgrowth.

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

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

Dr. Lewis is a board-certified physician specializing in internal medicine and pediatrics. His clinical interests include immunology, infectious diseases and Alzheimer’s disease. Dr. Lewis obtained his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his residency at Geisinger Medical Center. He is certified by the American Board of Internal Medicine and the American Board of Pediatrics. Dr. Lewis is rated as an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. His top areas of expertise are Maturity Onset Diabetes of the Young, Enlarged Prostate (BPH), Type 2 Diabetes (T2D), and End-Stage Renal Disease (ESRD).

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 Small Bowel Bacterial Overgrowth. 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).

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 the treatment of Small Bowel Bacterial Overgrowth. His top areas of expertise are Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Spinal Muscular Atrophy (SMA), Spinal Muscular Atrophy Type 3, and Gastric Bypass.

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 Small Bowel Bacterial Overgrowth. His top areas of expertise are Anaplastic Thyroid Cancer, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Glutaric Acidemia Type 2.

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 an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. His top areas of expertise are Malnutrition, Maturity Onset Diabetes of the Young, Familial Colorectal Cancer, and Type 2 Diabetes (T2D).

Mark Guilfoose is a primary care provider, practicing in Family Medicine in Danville, Pennsylvania. Dr. Guilfoose is rated as an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. His top areas of expertise are Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's Disease), Spinal Muscular Atrophy (SMA), Spinal and Bulbar Muscular Atrophy, and Spinal Muscular Atrophy Type 3.

Kyungsook Kim is a primary care provider, practicing in Family Medicine in Danville, Pennsylvania. Dr. Kim is rated as an Experienced provider by MediFind in the treatment of Small Bowel Bacterial Overgrowth. Her top areas of expertise are Diabetic Nephropathy, Chronic Obstructive Pulmonary Disease (COPD), Acquired Agranulocytosis, and Maturity Onset Diabetes of the Young.