Janice fields, md, is a gastroenterology specialist practicing in novi, mi with 32 years of experience. This provider currently accepts 56 insurance plans including. Webdoctors use this test to see inside the upper digestive tract and find the cause of your symptoms. An upper endoscopy is also known as an esophagogastroduodenoscopy. Webupper gastrointestinal (gi) endoscopy (esophagogastroduodenoscopy [egd]) includes visualization of the oropharynx, esophagus, stomach, and proximal.