| K05 | Gingivitis and periodontal diseases |
| K05.0 | Acute gingivitis |
| K05.00 | Acute gingivitis, plaque induced |
| K05.01 | Acute gingivitis, non-plaque induced |
| K05.1 | Chronic gingivitis |
| K05.10 | Chronic gingivitis, plaque induced |
| K05.11 | Chronic gingivitis, non-plaque induced |
| K05.2 | Aggressive periodontitis |
| K05.20 | Aggressive periodontitis, unspecified |
| K05.21 | Aggressive periodontitis, localized |
| K05.22 | Aggressive periodontitis, generalized |
| K05.3 | Chronic periodontitis |
| K05.30 | Chronic periodontitis, unspecified |
| K05.31 | Chronic periodontitis, localized |
| K05.32 | Chronic periodontitis, generalized |
| K05.4 | Periodontosis |
| K05.5 | Other periodontal diseases |
| K05.6 | Periodontal disease, unspecified |
| K06 | Other disorders of gingiva and edentulous alveolar ridge |
| K06.0 | Gingival recession |
| K06.1 | Gingival enlargement |
| K06.2 | Gingival and edentulous alveolar ridge lesions associated with trauma |
| K06.8 | Other specified disorders of gingiva and edentulous alveolar ridge |
| K06.9 | Disorder of gingiva and edentulous alveolar ridge, unspecified |