K80.00 Calculus of gallbladder with acute cholecystitis without obstruction

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from K80 Cholelithiasis

Excludes1 (never code together)

• retained cholelithiasis following cholecystectomy (K91.86)

Applies from K80.0 Calculus of gallbladder with acute cholecystitis

Applicable to

• Any condition listed in K80.2 with acute cholecystitis

Use additional code

• code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)

MS-DRG index

Defines the logic of DRG(s) 444-446 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 574.00 Calculus of gallbladder with acute cholecystitis, without mention of obstruction (approximate)

Code annotations containing back-references to K80.00

Back-references to K80.00

• Code First: K82.A Disorders of gallbladder in diseases classified elsewhere ("the type of cholecystitis (K81.-), or cholelithiasis with cholecystitis (K80.00-K80.19, K80.40-K80.47, K80.60-K80.67)")

Back-references to K80

• Use Additional: D57.09 Hb-SS disease with crisis with other specified complication ("cholelithiasis (K80.-)")
• Use Additional: D57.218 Sickle-cell/Hb-C disease with crisis with other specified complication ("cholelithiasis (K80.-)")
• Use Additional: D57.418 Sickle-cell thalassemia, unspecified, with crisis with other specified complication ("cholelithiasis (K80.-)")
• Use Additional: D57.438 Sickle-cell thalassemia beta zero with crisis with other specified complication ("cholelithiasis (K80.-)")
• Use Additional: D57.458 Sickle-cell thalassemia beta plus with crisis with other specified complication ("cholelithiasis (K80.-)")
• Use Additional: D57.818 Other sickle-cell disorders with crisis with other specified complication ("cholelithiasis (K80.-)")
• Type 1 Excludes: K81 Cholecystitis ("cholecystitis with cholelithiasis (K80.-)")
• Type 1 Excludes: K82.0 Obstruction of gallbladder ("obstruction of gallbladder with cholelithiasis (K80.-)")
• Type 1 Excludes: K82.4 Cholesterolosis of gallbladder ("cholesterolosis of gallbladder with cholelithiasis (K80.-)")
• Type 1 Excludes: K83.1 Obstruction of bile duct ("obstruction of bile duct with cholelithiasis (K80.-)")

Diagnosis Index entries for K80.00

• Calculus, calculi, calculous › gallbladder › with › cholecystitis › acute

Nearby codes

• K80 Cholelithiasis
• K80.0 Calculus of gallbladder with acute cholecystitis
• K80.00 Calculus of gallbladder with acute cholecystitis without obstruction (this code)
• K80.01 Calculus of gallbladder with acute cholecystitis with obstruction
• K80.1 Calculus of gallbladder with other cholecystitis
• K80.10 Calculus of gallbladder with chronic cholecystitis without obstruction
• K80.11 Calculus of gallbladder with chronic cholecystitis with obstruction
• K80.12 Calculus of gallbladder with acute and chronic cholecystitis without obstruction