K05.5 vs K13.21
K05.5 (Other periodontal diseases) compared with K13.21 (Leukoplakia of oral mucosa, including 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. K05.5 carries an Excludes2 note covering K13.21: “leukoplakia of gingiva (K13.21)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. K13.21 carries an Excludes2 note covering K05.5: “certain disorders of gingiva and edentulous alveolar ridge (K05-K06)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| K05.5Other periodontal diseases | K13.21Leukoplakia of oral mucosa, including tongue | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Other periodontal diseases is a billable ICD-10-CM diagnosis code (K05.5). | Leukoplakia of oral mucosa, including tongue is a billable ICD-10-CM diagnosis code (K13.21). |
| Includes | Combined periodontic-endodontic lesion Narrow gingival width (of periodontal soft tissue) | 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