ICD-10 Code K80.40 – Calculus of bile duct with cholecystitis, unspecified, without obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K80.40 – Calculus of bile duct with cholecystitis, unspecified, without obstruction
What it is
This code identifies gallstones in the bile duct with inflammation of the gallbladder, when the cholecystitis type is not specified and there is no obstruction. Use it when the record clearly supports both the duct stone and cholecystitis.
Clinical signs
Typical findings include right upper abdominal pain, nausea, vomiting, and signs of gallbladder inflammation. Clinical features vary; refer to documentation for imaging or operative confirmation of a bile duct calculus and cholecystitis.
When to use this code
Use K80.40 when the provider documents a calculus in the bile duct plus cholecystitis, but does not specify acute or chronic, and no obstruction is reported. It also fits cases where imaging, surgery, or discharge summary confirms both conditions. Check documentation if obstruction status is unclear.
Do not use for
Do not use this code for isolated gallbladder stones, bile duct stones without cholecystitis, or cases with documented obstruction. If the record specifies acute or chronic cholecystitis, choose the more specific code.
Coding tip
Verify three elements: bile duct calculus, cholecystitis, and absence of obstruction; if any element is missing, check documentation before coding.