CPT® Code 43240

Esophagogastroduodenoscopy, flexible, transoral; with transmural drainage of pseudocyst (includes placement of transmural drainage catheter[s]/stent[s], when performed, and endoscopic ultrasound, when performed)

An esophagogastroduodenoscopy (EGD) is a specialized upper gastrointestinal (UGI) endoscopic procedure that allows for a comprehensive examination of the esophagus, stomach, and duodenum, and in some cases, the jejunum. This procedure is particularly significant when addressing conditions such as pseudocysts, which are fluid-filled sacs that can develop in the gastrointestinal wall. During the EGD, a flexible fiberoptic endoscope is utilized, which is a thin, flexible tube equipped with a light and camera, enabling the physician to visualize the internal structures of the upper GI tract in real-time. The procedure begins with the administration of a local anesthetic to numb the mouth and throat, facilitating the insertion of the endoscope. As the patient swallows, the endoscope is carefully advanced through the esophagus into the stomach, where air is introduced to expand the stomach for better visibility. The physician inspects various regions of the stomach, including the cardia, fundus, and antrum, for any abnormalities. Following this, the endoscope is further advanced into the duodenum and/or jejunum, allowing for a thorough inspection of the mucosal surfaces. In cases where a pseudocyst is identified, additional techniques such as endoscopic ultrasound may be employed to accurately locate the cyst. This involves the use of a scanning echoendoscope, which provides ultrasound imaging to guide the physician in puncturing the pseudocyst and draining its contents. The procedure may also include the placement of a transmural drainage catheter or stent to ensure continued drainage and prevent future complications. Overall, the EGD with transmural drainage of a pseudocyst is a critical intervention that combines diagnostic and therapeutic elements to manage complex gastrointestinal conditions effectively.