About
Dr. Larry Good has practiced gastroenterology on Long Island since 1978, building one of the most tenured careers in digestive medicine in the New York metropolitan area. A. D. with Alpha Omega Alpha honors from the Medical University of South Carolina College of Medicine in 1973. He completed his internal medicine residency at Medical University of South Carolina, serving as Chief Medical Resident in 1976. He then trained in gastroenterology at the University of Pennsylvania Health System, finishing his fellowship in 1978.
Dr. Good holds dual board certifications from the American Board of Internal Medicine in both gastroenterology and internal medicine. He served as Director of Liver Diseases at Nassau County Medical Center and as Chief of the Division of Gastroenterology at South Nassau Communities Hospital. He holds an appointment as Assistant Clinical Professor of Medicine at SUNY Stony Brook and serves as a Senior Research Fellow at Thomas Jefferson University, where he draws on emerging science to inform daily clinical practice. , LLC, he maintains active ties to research. His current clinical investigations focus on the microbiome, IBD, IBS, and orally administered gamma globulin for gastrointestinal disorders. His publication record spans the New England Journal of Medicine, Gastroenterology, and the World Journal of Gastroenterology, among others. He is passionate about digestive health, gut microbiome science, metabolic syndrome, cancer screening, and longevity medicine.
Education & Training
Undergraduate
Colgate University, B.A., 1969 (Magna Cum Laude)
Medical School
Medical University of South Carolina College of Medicine, Class of 1973 (Alpha Omega Alpha)
Residency
Internal Medicine, Medical University of South Carolina, 1973-1976 (Chief Medical Resident 1976)
Fellowship
Gastroenterology, University of Pennsylvania Health System, 1976-1978
Additional Training
Senior Research Fellow, Thomas Jefferson University; Assistant Clinical Professor of Medicine, SUNY Stony Brook
Certifications
Conditions Treated
Who is Dr. Good right for?
Dr. Good is a strong fit for adults managing complex gastrointestinal conditions such as IBS, IBD, Crohn's disease, ulcerative colitis, or liver disease. Patients who want a single physician to cover both GI specialty care and primary care needs benefit from his dual board certification in gastroenterology and internal medicine. Those interested in proactive health optimization, genetic profiling, or microbiome analysis find a natural home in his Wellness and Longevity program. Patients who value direct physician access and extended visit time thrive in his Concierge Choice program.
Similar Doctors Nearby
Dr. Jennifer DeMarcoDO
Family Medicinehigh cholesterol, Long Haul Covid, chronic inflammatory conditions +5 more
Dr. Jesse StoffMD, HMD, FAAFP, DABAM, FAPWCA
OncologyCancer, Autoimmune diseases, AIDS +3 more
Dr. William KleinMD
Internal Medicinecomplex chronic conditions, preventive health
Frequently Asked Questions
Dr. Good specializes in the full spectrum of gastrointestinal and liver conditions. His areas of focus include IBS, IBD, Crohn's disease, ulcerative colitis, celiac disease, liver disease, metabolic syndrome, and fecal incontinence. He also manages pouchitis and chronic mesenteric ischemia. His dual training in gastroenterology and internal medicine lets him address both specialty GI concerns and broader internal medicine needs.
Yes. Dr. Good holds board certification from the American Board of Internal Medicine in both gastroenterology and internal medicine. He also holds Fellow status in the American Gastroenterologic Association, which he earned in 1979.
Dr. Good has practiced gastroenterology since 1978, giving him nearly 50 years of clinical experience. He trained at the Medical University of South Carolina and completed his gastroenterology fellowship at the University of Pennsylvania Health System.
Yes. Dr. Good performs a wide range of diagnostic and therapeutic endoscopic procedures as part of his traditional gastroenterology practice. These procedures support comprehensive evaluation and management of gastrointestinal and liver diseases.
Dr. Good actively researches the gut microbiome, inflammatory bowel disease, irritable bowel syndrome, and orally administered gamma globulin for GI disorders. He serves as a Senior Research Fellow at Thomas Jefferson University and as editor of BMC Gastroenterology. He brings findings from current research directly into his clinical practice.
Dr. Good focuses on moving patients away from reactive illness management toward proactive wellness maintenance. He uses advanced biomarker testing, genetic profiling, gut microbiome analysis, and personalized nutrition and lifestyle planning to help patients understand and optimize their health before problems develop.
Yes. Through the Concierge Choice program, Dr. Good functions as both a gastroenterologist and a primary care physician for enrolled members. This gives patients with chronic GI conditions a single, deeply familiar physician managing their total health.
Dr. Good holds an appointment as Assistant Clinical Professor of Medicine at SUNY Stony Brook and serves as a Senior Research Fellow at Thomas Jefferson University. He previously served as Director of Liver Diseases at Nassau County Medical Center and as Chief of the Division of Gastroenterology at South Nassau Communities Hospital. D. with Alpha Omega Alpha honors from the Medical University of South Carolina.
Doctor profile last updated June 11, 2026