K82.A1 Gangrene of gallbladder in cholecystitis

Billable ICD-10-CM code, FY2026.

Applies from K82 Other diseases of gallbladder

Excludes1 (never code together)

• nonvisualization of gallbladder (R93.2)
• postcholecystectomy syndrome (K91.5)

Applies from K82.A Disorders of gallbladder in diseases classified elsewhere

Code first

• the type of cholecystitis (K81.-), or cholelithiasis with cholecystitis (K80.00-K80.19, K80.40-K80.47, K80.60-K80.67)

MS-DRG index

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

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to K82.A1

Back-references to K82.A1

• Use Additional: K80.0 Calculus of gallbladder with acute cholecystitis ("code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)")
• Use Additional: K80.1 Calculus of gallbladder with other cholecystitis ("code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)")
• Use Additional: K80.4 Calculus of bile duct with cholecystitis ("code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)")
• Use Additional: K80.6 Calculus of gallbladder and bile duct with cholecystitis ("code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)")
• Use Additional: K81 Cholecystitis ("code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)")

Back-references to K82

• Type 2 Excludes: K83 Other diseases of biliary tract ("conditions involving the gallbladder (K81-K82)")
• Type 2 Excludes: K83 Other diseases of biliary tract ("conditions involving the cystic duct (K81-K82)")

Diagnosis Index entries for K82.A1

• Cholecystitis › with › gangrene of gallbladder

Nearby codes

• K82.3 Fistula of gallbladder
• K82.4 Cholesterolosis of gallbladder
• K82.8 Other specified diseases of gallbladder
• K82.9 Disease of gallbladder, unspecified
• K82.A Disorders of gallbladder in diseases classified elsewhere
• K82.A1 Gangrene of gallbladder in cholecystitis (this code)
• K82.A2 Perforation of gallbladder in cholecystitis