ICD-10 Code K80.51 – Calculus of bile duct without cholangitis or cholecystitis with obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K80.51 – Calculus of bile duct without cholangitis or cholecystitis with obstruction
What it is
This code identifies a gallstone located in the bile duct that is causing obstruction, without documented cholangitis or cholecystitis. Use it when the record shows ductal blockage from a stone and does not describe infection or gallbladder inflammation.
Clinical signs
Patients may have biliary pain, jaundice, dark urine, pale stools, or evidence of bile duct obstruction on imaging. Clinical features vary; refer to documentation.
When to use this code
Use K80.51 when the provider documents a calculus in the bile duct with obstruction and explicitly rules out cholangitis and cholecystitis. It also fits when imaging or procedure notes confirm an obstructing duct stone and the encounter is focused on that diagnosis. Check documentation if the wording is unclear.
Do not use for
Do not use this code if the stone is in the gallbladder rather than the bile duct, or if cholangitis or cholecystitis is documented. If obstruction is not specified, verify the record before coding.
Coding tip
Confirm both the stone location and the presence of obstruction in the provider note before assigning K80.51.