ICD-10-CM Alphabetic Index · FY 2026 29 Entries
Cholecystitis in the ICD-10-CM Index ICD-10-CM
The main term Cholecystitis carries 29 index entries pointing to 10 ICD-10-CM codes. The default entry is K81.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
29
Index Entries
10
Codes Referenced
K81.9
Default Code
C
Letter
29 of 29 shown
ICD-10-CM
Index Entries Under Cholecystitis 29 entries · 10 codes
Cholecystitis K81.9
with
calculus, stones in
bile duct (common) (hepatic) see Calculus, bile duct, with cholecystitis
cystic duct see Calculus, gallbladder, with cholecystitis
gallbladder see Calculus, gallbladder, with cholecystitis
choledocholithiasis see Calculus, bile duct, with cholecystitis
cholelithiasis see Calculus, gallbladder, with cholecystitis
gangrene of gallbladder K82.A1
perforation of gallbladder K82.A2
acute (emphysematous) (gangrenous) (suppurative) K81.0
with
calculus, stones in
cystic duct see Calculus, gallbladder, with cholecystitis, acute
gallbladder see Calculus, gallbladder, with cholecystitis, acute
choledocholithiasis see Calculus, bile duct, with cholecystitis, acute
cholelithiasis see Calculus, gallbladder, with cholecystitis, acute
chronic cholecystitis K81.2
with gallbladder calculus K80.12
with obstruction K80.13
chronic K81.1
with acute cholecystitis K81.2
with gallbladder calculus K80.12
with obstruction K80.13
emphysematous (acute) see Cholecystitis, acute
gangrenous see Cholecystitis, acute
paratyphoidal, current A01.4
suppurative see Cholecystitis, acute
typhoidal A01.09
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
