K80.66 — Calculus of gallbladder and bile duct with acute and chronic cholecystitis without obstruction
K80.66 is a billable, specific ICD-10-CM code for calculus of gallbladder and bile duct with acute and chronic cholecystitis without obstruction. It is valid for submission on a claim.
Risk adjustment
K80.66 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
K80.66 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56389Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A57414Billing and Coding: Upper Gastrointestinal Endoscopy (Diagnostic and Therapeutic)
How K80.66 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K80.66.
- Calculus, calculi, calculous›gallbladder and bile duct›with›cholecystitis›acute›with›chronic cholecystitis
- Calculus, calculi, calculous›gallbladder and bile duct›with›cholecystitis›chronic›with›acute cholecystitis
Related codes at this level
Codes that share K80.6. If K80.66 is not quite right, the correct code is usually one of these.
- K80.60Calculus of gallbladder and bile duct with cholecystitis, unspecified, without obstruction
- K80.61Calculus of gallbladder and bile duct with cholecystitis, unspecified, with obstruction
- K80.62Calculus of gallbladder and bile duct with acute cholecystitis without obstruction
- K80.63Calculus of gallbladder and bile duct with acute cholecystitis with obstruction
- K80.64Calculus of gallbladder and bile duct with chronic cholecystitis without obstruction
- K80.65Calculus of gallbladder and bile duct with chronic cholecystitis with obstruction
- K80.67Calculus of gallbladder and bile duct with acute and chronic cholecystitis with obstruction
Questions about K80.66
- Is K80.66 a billable ICD-10-CM code?
- Yes. K80.66 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K80.66 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Disorders of gallbladder, biliary tract and pancreas (K80-K87).