Table 1 Definition of gallstone-related complications and procedures based on the ICD-9-CM codes
From: Nationwide epidemiological study of severe gallstone disease in Taiwan
Categories | ICD-9-CM codes |
Acute cholecystitis | 574.0, 574.3, 574.6, 574.8 |
Biliary pancreatitis | 574 plus 577.0, 577.1 |
Acute cholangitis | 574 plus 576.1 |
Elective cholecystectomy | 574, 574.1, 574.2, 574.4, 574.5, 574.7, 574.9 plus 51.22, 51.23 |
Non-elective cholecystectomy | 574.0, 574.3, 574.6, 574.8 plus 51.22, 51.23 |
Gallstones receiving ERCP | 574 plus 51.10, 51.11, 51.64, 51.84, 51.85, 51.86, 51.87, 51.88, 52.13 |