J34.81 vs K12.3
J34.81 (Nasal mucositis (ulcerative)) compared with K12.3 (Oral mucositis (ulcerative)), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. J34.81 carries an Excludes2 note covering K12.3: “oral mucositis (ulcerative) (K12.3-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. K12.3 carries an Excludes2 note covering J34.81: “nasal mucositis (ulcerative) (J34.81)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| J34.81Nasal mucositis (ulcerative) | K12.3Oral mucositis (ulcerative) | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | J00-J99 — Diseases of the Respiratory System (J00-J99) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Nasal mucositis (ulcerative) is a billable ICD-10-CM diagnosis code (J34.81). | Oral mucositis (ulcerative) is a non-billable ICD-10-CM category code (K12.3). |
| Includes | — | Mucositis (oral) (oropharyneal) |
| 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