ICD-10 Code K80.66 – Calculus of gallbladder and bile duct with acute and chronic cholecystitis without obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K80.66 – Calculus of gallbladder and bile duct with acute and chronic cholecystitis without obstruction
What it is
This code identifies gallstones in the gallbladder or bile duct when both acute and chronic inflammation of the gallbladder are documented, and there is no obstruction. Use it when the record clearly supports this combined diagnosis.
Clinical signs
Typical findings include right upper quadrant pain, gallbladder inflammation, and a history suggesting recurrent or ongoing cholecystitis. Clinical features vary; refer to documentation.
When to use this code
Use K80.66 when the provider documents calculi plus both acute and chronic cholecystitis in the same encounter. It is appropriate when imaging, operative notes, or discharge summaries support gallstones without obstruction. If the chart does not clearly state all elements, check documentation.
Do not use for
Do not use this code if obstruction is documented, or if only acute or only chronic cholecystitis is present. Do not assign it for gallstones without cholecystitis.
Coding tip
Match the code to the exact provider wording, and confirm “without obstruction” is explicitly documented.