K13.21 vs K14
K13.21 (Leukoplakia of oral mucosa, including tongue) compared with K14 (Diseases of tongue), 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. K13.21 carries an Excludes2 note covering K14: “diseases of tongue (K14.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. K14 carries an Excludes2 note covering K13.21: “leukoplakia of tongue (K13.21)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| K13.21Leukoplakia of oral mucosa, including tongue | K14Diseases of tongue | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Leukoplakia of oral mucosa, including tongue is a billable ICD-10-CM diagnosis code (K13.21). | Diseases of tongue is a non-billable ICD-10-CM category code (K14). |
| Includes | epithelial disturbances of tongue Leukokeratosis of oral mucosa Leukoplakia of gingiva, lips, tongue | — |
| 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