ICD-10-CM 2027
ICD-10 code for chronic cholecystitis
From the official ICD-10-CM alphabetic index entry “Cholecystitis › chronic”. Page updated September 29, 2026.
About coding chronic cholecystitis
The ICD-10-CM code for chronic cholecystitis is K81.1 (Chronic cholecystitis). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K81.1.
Within K81 (cholecystitis), K81.1 is specifically for chronic cholecystitis. Related codes cover acute cholecystitis (K81.0), acute cholecystitis with chronic cholecystitis (K81.2) and unspecified (K81.9).
Use an additional code if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific chronic cholecystitis codes (official index)
Common questions about chronic cholecystitis ICD-10 codes
What is the ICD-10 code for chronic cholecystitis?
- K81.1 — Chronic cholecystitis. More specific codes apply when the documentation supports them: K81.2, K80.12, K80.13.
Is K81.1 billable?
- Yes. K81.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K81.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K81.1 as a principal diagnosis.
Is K81.1 a CC or MCC?
- No. K81.1 is neither a CC nor an MCC under MS-DRG v44.0.