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

American Society of Colon and Rectal Surgeons
- Society of board certified surgeons. Promotes the science and practice of treatment of patients. Search for a surgeon, research, newsletter, and membership information.
- http://www.fascrs.org/

European Association for the Study of the Liver
- Publishes "Journal of Hepatology", with full-text articles online.
- http://www.easl.ch

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.
- http://www.asbp.org/

Cochin Clinical Society
- Clinical Society for the Doctors of all specialities in Cochin, India.
- http://ccsociety.topcities.com

Canadian Digestive Health Foundation
- Dedicated to public education and promoting research to improve quality of life of Canadians with digestive disorders and their families.
- http://www.cdhf.ca

Pediatric / Adolescent Gastroesophageal Reflux Association (PAGER)
- Non-profit organization that provides information and support to parents, patients and doctors about Gastroesophageal Reflux (GER).
- http://www.reflux.org/reflux/paghomfa.nsf/($WebPage)/frahome.htm

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.
- http://www.asge.org/

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.
- http://www.cbgna.org/

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.
- http://www.lhsc.on.ca/casl/

Helicobacter Pylori Foundation
- Dedicated to providing latest information about Helicobacter pylori, its diagnosis, treatment and clinical correlations.
- http://www.helico.com/

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.
- http://www.bsg.org.uk/

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.
- http://www.ssat.com/

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.
- http://www.sages.org/

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.
- http://www.omed.org

Digestive Disease Week
- Organization of practitioners focused on digestive diseases.
- http://www.ddw.org/

Canadian Association of Gastroenterology
- Organization of gastroenterology practitioners and researchers based in Canada.
- http://www.cag-acg.org/

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.
- http://www.ccfa.org/

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.
- http://www.gastro.org

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
- http://www.ilts.org/

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.
- http://www.niddk.nih.gov/index.htm

American Liver Foundation
- Provides information about liver in health and disease, research funding, and patient related information.
- http://www.liverfoundation.org/

North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
- Advances the understanding of the normal development and physiology of diseases of the gastrointestinal tract and liver in infants, children, and adolescents.
- http://www.naspghan.org

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.
- http://www.alpha1.org

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.
- http://www.omge.org/

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.
- http://www.aasld.org/

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.
- http://www.iffgd.org/

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.
- http://www.digestivedisorders.org.uk/

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

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.
- http://www.acg.gi.org

The American Society for Parenteral and Enteral Nutrition
- Professional organization whose members are involved in the provision of clinical nutrition therapies, including parenteral and enteral nutrition.
- http://www.clinnutr.org/