What does EGD stand for?

Can anyone tell me what EGD actually stands for...I have a supplemental insurance plan through my job that I completely forgot about and I am trying to see if it is covered.

Esophagogastroduodenoscopy: Also known as EGD or upper endoscopy. A procedure that enables the examiner (usually a gastroenterologist) to examine the esophagus (the swallowing tube), stomach, and duodenum (the first portion of small bowel) using a thin flexible tube (a "scope") that can be looked through or seen on a TV monitor. (A great crossword puzzle/trivia term!)

You should be a Jeopardy contestant.  Thanks so much!