CMHC Faculty Members

Faculty of Tarsus Medical Group are leaders in healthcare

Come see me speak18th Annual Cardiometabolic Health Congress

Christopher D. Still, DO

Danville, Pennsylvania

Christopher D. Still, DO

Obesity Medicine Scientist


Dr. Christopher Still is a professor of medicine at the Geisinger Commonwealth School of Medicine. He is also the medical director of the Center for Nutrition and Weight Management within the Geisinger Obesity Institute. He is certified by the American Board of Internal Medicine, the American Board of Obesity Medicine, the American Board of Physician Nutrition Specialists, and the American College of Nutrition.

Dr. Still has studied the developments in nutrition, metabolic syndrome, and obesity for nearly three decades. His work has included: research into genetic markers for obesity; nonalcoholic steatohepatitis; diabetes; the metabolic differences among men with obesity, formerly with obesity, and average-weight men; surgical options for patients with severe obesity; and leptin-level determination among older adult women with obesity. He has published articles in The New England Journal of Medicine, Obesity, Proceedings of the National Academy of Sciences, Lancet Endocrinology, Annals of Surgery, Gastroenterology, Journal of Clinical Gastroenterology, Surgery for Obesity and Related Disorders, and Human Molecular Genetics. He lectures on topics such as vitamin and mineral metabolism, diet, nutrition, and exercise, obesity through the life cycle, and the perioperative medical and nutritional management of patients who’ve undergone bariatric surgery.

Education and Training

  • Internal Medicine Residency, and Clinical Nutrition and Obesity Treatment Fellowship, Geisinger Medical Center
  • Master of Science, Columbia University Institute of Human Nutrition
  • Internship, University of Buffalo at Sisters of Charity Hospital
  • Osteopathic Medical Degree, The Philadelphia College of Osteopathic Medicine

Professional Highlights

  • Member: The Obesity Society, American Society for Metabolic and Bariatric Surgery and American Society of Parenteral and Enteral Nutrition
  • Fellow: American College of Physicians and the American College of Nutrition
  • Board of Directors: Obesity Action Coalition
  • Past President, National Board of Physician Nutrition Specialists
  • Editor, Nutrition and Bariatric Surgery


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