CPT® Code 48510

External drainage of a pancreatic pseudocyst is a surgical procedure that involves accessing the pancreas through an open approach, typically via a subcostal or midline abdominal incision. This procedure is indicated when a pseudocyst, which is a fluid-filled sac that can develop in the pancreas, requires drainage to alleviate symptoms or prevent complications. During the operation, the surgeon carefully exposes the pancreas and locates the pseudocyst. To confirm the nature of the cyst, it is aspirated to ensure that it contains fluid. Following this, a small incision is made in the cyst wall, and a biopsy may be performed to rule out the presence of malignancy. After confirming the cyst's characteristics, one or more drains are inserted into the cyst cavity to facilitate the continuous drainage of fluid. These drains are secured in place, and the abdominal incision is then closed around the drains, allowing for ongoing monitoring and management of the cyst's contents postoperatively.