B26 vs K11.2
B26 (Mumps) compared with K11.2 (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. K11.2 carries an Excludes1 note covering B26: “epidemic parotitis (B26.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. K11.2 carries an Excludes1 note covering B26: “mumps (B26.-)”
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
| B26Mumps | K11.2Sialoadenitis | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Mumps is a non-billable ICD-10-CM category code (B26). | Sialoadenitis is a non-billable ICD-10-CM category code (K11.2). |
| Includes | epidemic parotitis infectious parotitis | Parotitis |
| Use additional code | — | 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