American College of Surgeons (ACS) has information on the ACS, and lists pamphlets you can order by phone, which include "Patient's Choices", "What is Laporoscopic Surgery?" and "When You Need an Operation."
American Gastroenterological Association is a professional association of gastroenterologists featuring a digestive health section for patients.
American Medical Association (AMA) offers an online service, in which you can see if a physician is accredited by the AMA. And has other medical associations, and medical journals online.
American Pseudo-obstruction and Hirschsprung's Disease Society, Inc. (APHS) has a Wide variety of information. Parents share stories about kids with functional gastrointestinal disorders.
American Society for Parenteral and Enteral Nutrition (ASPEN) offers information for people on TPN.
Food and Drug Administration (FDA) information about FDA approved drugs and a bunch of other things they regulate.
Reliable health information.
International Foundation for Functional Gastrointestinal Disorders (IFFGD) offers information, assistance and support for people affected by a gastointestinal disorder
.
National Digestive Disease Information Clearinghouse offers information about Diabetes, GI, and Kidney diseases.
National Organization For Rare Disorders (NORD) offers information about rare disorders and more.
Society of Laporoendoscopic Surgeons (SLS) has information about laproscopic surgery.
Society of Gastroenterology Nurses and Associates, Inc. information on gastroenterolony nurses.
Information about GERD and the heartburn helpline.
Information about IBS and more.
Information about incontinence and treatment options.
Full Health Library and information on Gastroenterology.
All kinds of health information.
All About Crohn's disease.
Resource for patients with Crohn's disease and Colitis.