ICD-10 Code K80.00 – Calculus of gallbladder with acute cholecystitis without obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K80.00 – Calculus of gallbladder with acute cholecystitis without obstruction
What it is
This code identifies gallstones in the gallbladder with acute inflammation of the gallbladder, and no obstruction is documented. Use it when the record clearly links both the calculus and acute cholecystitis.
Clinical signs
Typical findings include right upper quadrant pain, tenderness, nausea, and possible fever. Clinical features vary; refer to documentation for imaging, exam findings, and the provider’s final diagnosis.
When to use this code
Use K80.00 when the provider documents gallbladder stones and acute cholecystitis without mentioning obstruction. It fits operative notes, discharge summaries, or problem lists that confirm both conditions together. If the record is unclear, check documentation before coding.
Do not use for
Do not use this code if acute cholecystitis is not documented, or if obstruction is stated. Check documentation when the note only says biliary colic, chronic cholecystitis, or gallstones without acute inflammation.
Coding tip
Verify that “without obstruction” is documented explicitly, because that detail changes code selection.