ICD-10 Code K80.01 – Calculus of gallbladder with acute cholecystitis with obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K80.01 – Calculus of gallbladder with acute cholecystitis with obstruction
What it is
This code describes gallstones in the gallbladder causing acute inflammation and blockage. Use it when the record shows both acute cholecystitis and obstruction linked to the stone.
Clinical signs
Typical findings include right upper quadrant pain, tenderness, nausea, and signs of acute gallbladder inflammation. Clinical features vary; refer to documentation.
When to use this code
Use K80.01 when the provider documents calculus of the gallbladder with acute cholecystitis and obstruction. The note should clearly connect the stone to the acute inflammatory process and the obstructive component. If the record does not specify obstruction, check documentation.
Do not use for
Do not use this code for gallstones without acute cholecystitis, or for cholecystitis not linked to a gallbladder calculus. Do not assume obstruction unless it is documented.
Coding tip
Verify that all three elements—stone, acute cholecystitis, and obstruction—are documented before assigning K80.01.