K80: Cholelithiasis
K80.0: Calculus of gallbladder with acute cholecystitis

inclusionTerm
Any condition listed in K80.2 with acute cholecystitis

useAdditionalCode
code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)
K80.00: Calculus of gallbladder with acute cholecystitis without obstruction
K80.01: Calculus of gallbladder with acute cholecystitis with obstruction

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