CPT® Code 44366

Small intestinal endoscopy, enteroscopy beyond second portion of duodenum, not including ileum; with control of bleeding (eg, injection, bipolar cautery, unipolar cautery, laser, heater probe, stapler, plasma coagulator)

The CPT® Code 44366 refers to a specific medical procedure known as small intestinal endoscopy, specifically an enteroscopy that extends beyond the second portion of the duodenum, excluding the ileum. This procedure is primarily performed to examine the small intestine for abnormalities and to control any bleeding that may be present. The duodenum, which is the first section of the small intestine, is divided into four distinct portions: the duodenal bulb or cap, the descending portion, the transverse portion, and the ascending portion. During the procedure, the patient is typically administered a local anesthetic spray to numb the mouth and throat, facilitating the insertion of a flexible fiberoptic endoscope. This endoscope is a thin, flexible tube equipped with a light and camera, allowing for direct visualization of the intestinal mucosa. The endoscope is carefully advanced through the esophagus and into the duodenum, where the physician inspects the mucosal surfaces for any signs of abnormalities, such as lesions or bleeding. The examination may extend into the jejunum, the second part of the small intestine, but does not include the ileum, which is the final section. If any bleeding is detected during the procedure, various techniques can be employed to control it, including the use of thermal modalities like bipolar or unipolar cautery, heater probes, or laser coagulation. Additionally, injections of epinephrine may be utilized to constrict blood vessels and help manage bleeding. Overall, this procedure is crucial for diagnosing and treating conditions affecting the small intestine, particularly those involving bleeding.