ICD-10-CM > K00-K95 > K80-K87 > K82 > K82.A K82.A Disorders of gallbladder in diseases classified elsewhere Non-Billable/Non-Specific Code First the type of cholecystitis (K81.-), or cholelithiasis with cholecystitis (K80.00-K80.19, K80.40-K80.47, K80.60-K80.67) Codes K82.A1Gangrene of gallbladder in cholecystitisK82.A2Perforation of gallbladder in cholecystitis