K80.40 Calculus of bile duct with cholecystitis, unspecified, without obstruction

ICD-10-CM K80.40: Calculus of bile duct with cholecystitis, unspecified, without obstruction

ICD-10-CM code K80.40 identifies a diagnosis of calculus of the bile duct with unspecified cholecystitis and without obstruction. The terminology record is active and classifies the concept as a Disease or Syndrome. This reference synthesizes official terminology data with clinical literature regarding acute cholecystitis and bile duct stones. 1 2

Plain-language overview

Code K80.40 represents a bile duct stone accompanied by gallbladder inflammation that is unspecified and explicitly without obstruction, providing a diagnostic label for this particular clinical presentation. 1

What this code represents

The terminology record for K80.40 lists the preferred name as Calculus of bile duct with cholecystitis, unspecified, without obstruction, and assigns the semantic type of Disease or Syndrome. 1 4

K80.40 is a narrower concept under the parent code K80.4, which is the general category for calculus of the bile duct with cholecystitis in the ICD-10-CM version 2026. 1

Clinical context

Clinical literature notes that calculous acute cholecystitis involves cystic duct obstruction by stones or sludge, and jaundice may suggest severe cases with common bile duct stones. 2

The supplied clinical review distinguishes calculous acute cholecystitis from acalculous disease, which can occur from cystic duct obstruction secondary to biliary cancer, extrinsic inflammation, lymphadenopathy, or metastasis. 2

Coding details

The official abbreviation for K80.40 is Calculus of bile duct w cholecystitis, unsp, w/o obstruction, and the concept record currently holds an active status within the terminology system. 1

Documentation considerations

The official label for K80.40 explicitly designates the cholecystitis as unspecified and denotes the condition is without obstruction, distinguishing it from codes specifying acute inflammation. 1 3

What the sources add

While the official terminology record defines the exact code K80.40, the clinical literature provides operational context regarding the underlying mechanisms of calculous cholecystitis and associated bile duct complications. 1 2

A related code, K80.42, identifies calculus of the bile duct with acute cholecystitis without obstruction, demonstrating that distinct codes exist for specifying the acute nature of the gallbladder inflammation. 1 3

Sources

1. ICD-10-CM K80.40 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. The Diagnosis and Treatment of Acute Cholecystitis: A Comprehensive Narrative Review for a Practical Approach — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. ICD-10 | Calculus of bile duct with acute cholecystitis without obstruction (K80.42) — cdek.pharmacy.purdue.edu; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.