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K81.9 — Cholecystitis, unspecified
K81.9
What this code means
Cholecystitis is inflammation of the gallbladder, usually caused by a gallstone blocking its outlet.
Also called: cholecystitis, gallbladder inflammation.
When this code is used
Used for cholecystitis when the type is not specified.
Where it sits in ICD-10-CM
Code K81.9 belongs to Chapter 11: Diseases of the digestive system, which covers codes K00–K95 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Learn more about this condition
Related symptoms
Related anatomy
Frequently asked questions
What is ICD-10-CM code K81.9?
K81.9 is the ICD-10-CM diagnosis code for “Cholecystitis, unspecified”. Cholecystitis is inflammation of the gallbladder, usually caused by a gallstone blocking its outlet.
When is code K81.9 used?
Used for cholecystitis when the type is not specified. It belongs to Chapter 11 of ICD-10-CM (Diseases of the digestive system).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.