American College of Gastroenterology - Organization involved in study and treatment of disorders of the gastrointestinal tract. The College promotes medical education and attempts to meet the needs of clinical gastroenterology practitioners.

American Board of Internal Medicine - The site includes information on certification, examinations, policies, and publications of the ABIM subspecialties(eg. internal medicine, gastroenterology).

Digestive Disorders Foundation - United Kingdom based charity which supports research into disorders that can affect the digestive system. Information is provided about various digestive disorders.

Society of Gastroenterology Nurses and Associates (SGNA) - Organization of nurses and associates dedicated to the safe and effective practice of gastroenterology and endoscopy nursing.

International Foundation for Functional Gastrointestinal Disorders (IFFGD) - A nonprofit education and research organization whose mission is to inform, assist, and support people affected by functional gastrointestinal disorders or bowel incontinence.

American Association for the Study of Liver Diseases (AASLD) - A nonprofit, member organization serving the educational and scientific needs of its physicians, researchers, and scientists, who are striving to prevent and cure diseases of the liver and biliary tract.

World Organisation of Gastroenterology - Organization with focus on development of gastroenterology worldwide by supporting interaction between affiliated gastroenterological associations and by supporting research, education and ethics.

Alpha 1 Association - Organization which attempts to identify those affected by alpha-1-antitrypsin deficiency and to improve their quality of their lives through support, education, advocacy and research.

North American Society for Pediatric Gastroenterology, Hepatology and Nutrition - The North American Society for Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN) advances the understanding of the normal development and physiology of diseases of the gastrointestinal tract and liver in infants, children, and adolescents. Their goal is to foster the dissemination of this knowledge through scientific meetings, public education, and collaboration with other organizations concerned with pediatric gastroenterology, hepatology and nutrition.

American Digestive Health Foundation - This an education and resource site for physicians, scientists, consumers, and healthcare professionals. It offers information about research, funding, and education topics.

American Liver Foundation - Provides information about liver in health and disease, research funding, and patient related information.

Irritable Bowel Syndrome Association - Organization dedicated to helping everyone who suffers from IBS through patient support groups, treatment and education.

National Institute of Diabetes and Digestive and Kidney Diseases - Conducts and supports research on kidney, urologic, hematologic, digestive, metabolic and endocrine diseases, as well as on diabetes and nutrition.

International Liver Transplantation Society - Organization focused on promoting education and research by disseminating and exchanging information related to liver transplantation within the medical community, as well as to the public

American Gastroenterological Association - Organization of physicians, researchers and educators whose primary practice or research involves the functions and disorders of the digestive system. Provides information on new developments, jobs available, and a free medicine database.

CCFA: Crohn's & Colitis Foundation of America - American organization focused on improving the quality of life of people with Crohn's disease and ulcerative colitis through research. Provides information for both physicians and patients.

Crohn's and Colitis Foundation of Canada - Canadian organization dedicated to finding the cure for inflammatory bowel disease by raising increasing funds for research.

Canadian Association of Gastroenterology - Organization of gastroenterology practitioners and researchers based in Canada.

Digestive Disease Week - Organization of practitioners focused on digestive diseases.

OMED: World Organization for Digestive Endoscopy - International organization which participates in promotion of the study and advancement of gastrointestinal endoscopy and works to establish standards of practice and training in endoscopy.

Society of American Gastrointestinal Endoscopic Surgeons - Professional society and CME meeting, representing board certified surgeons who use endoscopy and laparoscopy as an integral part of their treatment of patients.

Society for Surgery of the Alimentary Tract - The objectives of the society are to stimulate and foster the development of surgical techniques with a focus on diseases of the alimentary tract. Includes practice guidelines for a few digestive diseases.

American Society of Colon and Rectal Surgeons - Professional society representing board certified Colon and Rectal surgeons and other surgeons dedicated to advancing and promoting the science and practice of the treatment of patients with diseases and disorders affecting the colon, rectum, and anus.

British Society of Gastroenterology - Organisation focused on the promotion of gastroenterology within the United Kingdom. It has is composed of physicians, surgeons, pathologists, radiologists, scientists, nurses, dietitians, and others interested in the field of gastroenterology.

Helicobacter Pylori Foundation - Dedicated to providing latest information about Helicobacter pylori, its diagnosis, treatment and clinical correlations.

European Association for the Study of the Liver - Organization of medical practioners based in Europe with a primary focus on the study of liver disease.

American Pseudo-obstruction and Hirschsprung's Disease Society - Organization which addresses the needs of individuals affected by gastrointestinal motility disorders. Their goal is to inform, and support families and healthcare providers dealing with these disorders.

Canadian Association for the Study of the Liver - Represents a multidisciplinary group of doctors, scientists and health care providers whose expertise focuses on the liver. Committed to improving quality of health care, support education, promote research, and provide a forum for research.

Canadian Hemochromatosis Society - Volunteer based organization which provides information to patients and physicians about hemochromatosis.

European Association for Endoscopic Surgery - Organisation focused on advancement of Endoscopic Surgery and development of advanced technology dependent interventions.

Hepatitis C Society of Canada - Non-profit, national voluntary health organization whose mission is to fight hepatitis C through prevention, early detection, support, appropriate treatment and comfort.

Certifying Board of Gastroenterology Nurses and Associates, Inc. - Focused on the certifying activities of the Board and is complete with examination, handbook, applications, and resource information.

The Society of Laparoendoscopic Surgeons - Non-profit organization dedicated to ensuring the highest standards for the practice of laparoscopy, endoscopy and minimally-invasive surgery.

American Society for Gastrointestinal Endoscopy - Represents gastroenterologists, surgeons, and other digestive health specialists who are committed to diagnosis and treatment of GI disease through the appropriate use of endoscopic techniques.

Canadian Digestive Disease Foundation - Dedicated to public education and promoting research to improve quality of life for those with digestive disorders and their families

Turkish Society of Gastroenterology - Organization based in Turkey composed of practioners interested in gastrointestinal diseases.

Pediatric / Adolescent Gastroesophageal Reflux Association (PAGER) - Non-profit organization that provides information and support to parents, patients and doctors about Gastroesophageal Reflux (GER).

American Society of Bariatric Physicians (ASBP) - National medical society of licensed physicians offering specialized programs in the medical treatment of obesity (bariatrics), weight loss and dieting.