K80 vs K91.86
K80 (Cholelithiasis) compared with K91.86 (Retained cholelithiasis following cholecystectomy), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. K80 carries an Excludes1 note covering K91.86: “retained cholelithiasis following cholecystectomy (K91.86)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| K80Cholelithiasis | K91.86Retained cholelithiasis following cholecystectomy | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Cholelithiasis is a non-billable ICD-10-CM category code (K80). | Retained cholelithiasis following cholecystectomy is a billable ICD-10-CM diagnosis code (K91.86). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources