Gastroenterology is the study of the gastrointestinal (GI) tract of the body. A gastroenterologist diagnoses and treats diseases of the digestive organs, including the stomach, esophagus, intestines, pancreas, liver and gallbladder. This specialist treats conditions such as abdominal pain, nausea and vomiting, ulcers, diarrhea, cancer in the GI tract, and jaundice. A gastroenterologist also performs complex diagnostic procedures, including the use of endoscopes to see and treat internal organs.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are Hemorrhoids, Hiatal Hernia, Digestive Disorders, heartburn, Rectal Bleeding, Ulcer, Ostomy Care, Polyps, colon cancer, Crohn's Disease, Diarrhea, Abdominal Pain, Constipation, acid reflux, Bowel Diseases, cystic fibrosis, Ulcerative Colitis, Nausea, Appendicitis, and Colitis.

Once properly diagnosed, practitioners can perform numerous procedures on patients including GERD Services, abdominal surgery, Appendectomy, Cholecystectomy, laparoscopy, Liver Transplantation, and Cholecystography.

To diagnose patients with possible illnesses and diseases, specialists will often perform one of many tests including endoscopy, Colonoscopy, Barium Enema, Liver Biopsy, Sigmoidoscopy, Barium Swallow, Abdominal Ultrasound, Esophagogastroduodenoscopy (EGD), Gallbladder Scan, Upper Gastrointestinal Series, Endoscopic Retrograde Cholangiopancreatography, Radiographic X-Ray, Proctoscopy, Pancreas Scan, Abdominal Angiogram, Anoscopy, Liver Scan, and Abdominal X-rays.

Doctor density varies by specialty and location. Hawaii has 55 practicing gastroenterologists. Broken out by city, gastroenterology doctor density in Aiea is 5, in Hilo is 4, in Honolulu is 41, in Kahului is 1, in Kailua is 3, in Kailua Kona is 1, in Kamuela is 2, in Kaunakakai is 1, in Kealakekua is 2, in Lahaina is 1, in Lihue is 1, in Makawao is 1, in Tripler Amc is 2, in Wahiawa is 2, in Wailuku is 3, and in Waipahu is 1.

One of the more popular vacation destinations in the world, Hawaii’s lush tropical environment invites all to relax and enjoy the outdoors. Popular Hawaiian activities include snorkeling, scuba diving, surfing, biking to one of Hawaii’s volcanoes, or enjoying a helicopter or horseback ride. Learn about Hawaii’s natural history and culture by attending a luau and watching a traditional hula dance. Hawaii’s population is 1,275,194, and the capital city is Honolulu. Statehood was achieved in 1959, making Hawaii our 50th state. Tourism is Hawaii's largest source of outside income. Visit the Polynesian Cultural Center, experience history at Pearl Harbor, or take a walk on Waikiki Beach, the world’s most famous shoreline.

According to 2005 Census estimates, Hawaii has a population of 1,275,194. Of this population, 198,087 are under the age of 18 and 162,565 are at or above the age of 65.