ICD-10 Code K80.37 – Calculus of bile duct with acute and chronic cholangitis with obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K80.37 – Calculus of bile duct with acute and chronic cholangitis with obstruction
What it is
This code identifies a bile duct stone causing both acute and chronic inflammation of the bile ducts, with blockage. It reflects a documented combination of choledocholithiasis, cholangitis, and obstruction.
Clinical signs
Typical findings include right upper quadrant pain, jaundice, and signs of biliary obstruction. Clinical features vary; refer to documentation for evidence of both acute and chronic cholangitis.
When to use this code
Use this code when the provider documents a calculus in the bile duct with acute and chronic cholangitis and obstruction. Apply it when all components are clearly stated or supported in the record. If the note only mentions a stone or cholangitis without obstruction, check documentation.
Do not use for
Do not use this code for gallbladder stones without bile duct involvement, or for cholangitis without a documented bile duct calculus. Do not assume obstruction unless it is specifically recorded.
Coding tip
Confirm that the record supports all three elements: bile duct stone, acute and chronic cholangitis, and obstruction.