A patient with chronic pancreatitis is surgically treated with Puestow procedure that involves side to side anastomosis of the pancreatic duct to the jejunum (with preservation of pancreatic tissue, as compared to Frey’s procedure). According to the CPT Index, the code for Puestow Procedure is Code 48548. According to the ICD-9-CM, the code for chronic pancreatitis is Code 557.1.