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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
  1. Endoscopic retrograde cholangiopancreatography