B00.2 vs K12
B00.2 (Herpesviral gingivostomatitis and pharyngotonsillitis) compared with K12 (Stomatitis and related lesions), 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. K12 carries an Excludes1 note covering B00.2: “herpesviral [herpes simplex] gingivostomatitis (B00.2)”
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
| B00.2Herpesviral gingivostomatitis and pharyngotonsillitis | K12Stomatitis and related lesions | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Herpesviral gingivostomatitis and pharyngotonsillitis is a billable ICD-10-CM diagnosis code (B00.2). | Stomatitis and related lesions is a non-billable ICD-10-CM category code (K12). |
| Includes | Herpesviral pharyngitis | — |
| 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