ICD-10 Code for Cholecystitis
The ICD-10-CM code for cholecystitis is K81.9 — Cholecystitis, unspecified. This is the code the Alphabetic Index gives for cholecystitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
K81.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which cholecystitis code should you use?
The Alphabetic Index lists 10 codes under Cholecystitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
Cholecystitis with
Cholecystitis chronic
| with acute cholecystitis | K81.2 | Acute cholecystitis with chronic cholecystitis | |
| with acute cholecystitis › with gallbladder calculus | K80.12 | Calculus of gallbladder with acute and chronic cholecystitis without obstruction | |
| with acute cholecystitis › with gallbladder calculus › with obstruction | K80.13 | Calculus of gallbladder with acute and chronic cholecystitis with obstruction |
Cholecystitis acute
| with › chronic cholecystitis | K81.2 | Acute cholecystitis with chronic cholecystitis | |
| with › chronic cholecystitis › with gallbladder calculus | K80.12 | Calculus of gallbladder with acute and chronic cholecystitis without obstruction | |
| with › chronic cholecystitis › with gallbladder calculus › with obstruction | K80.13 | Calculus of gallbladder with acute and chronic cholecystitis with obstruction |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources