K11.21 vs K11.22
K11.21 (Acute sialoadenitis) compared with K11.22 (Acute recurrent sialoadenitis), 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. K11.21 carries an Excludes1 note covering K11.22: “acute recurrent sialoadenitis (K11.22)”
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
| K11.21Acute sialoadenitis | K11.22Acute recurrent sialoadenitis | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Acute sialoadenitis is a billable ICD-10-CM diagnosis code (K11.21). | Acute recurrent sialoadenitis is a billable ICD-10-CM diagnosis code (K11.22). |
| Use additional code | code to identify: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | code to identify: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources