Objective To explore the surgical procedure coding for cholelithiasis,analyze common coding errors,and propose improvement solutions.Methods The knowledge on cholelithiasis was illustrated.Common surgical procedures for cho-lelithiasis and their ICD-9-CM-3 codes were introduced.The search path for surgical procedure codes was summarized.Errors in coding were analyzed by combining clinical cases.Results Open cholecystectomy for gallbladder stones was coded as 51.04,for common bile duct stones as 51.41,and other bile duct stones as 51.49.Laparoscopic and endoscopic removal of biliary stones were coded as 51.88,percutaneous gallbladder stone extraction as 51.88,common bile duct as 51.96,and other bile duct as 51.98.Non-standard writing by clinical physicians and insufficient coding skills of coders was easy to lead to coding errors.Con-clusion Errors in surgical procedure coding for cholelithiasis can be reduced by strengthening clinical communication,standardi-zing medical record writing,promoting mutual learning between coders and clinical physicians,enhancing their own professional skills,and establishing a multi-level quality control system for coding in the Medical Record Department