| K05 | Gingivitis and periodontal diseases | NON-BILLABLE CODE |
| K05.0 | Acute gingivitis | NON-BILLABLE CODE |
| K05.01 | Acute gingivitis, non-plaque induced | BILLABLE CODE |
| K05.1 | Chronic gingivitis | NON-BILLABLE CODE |
| K05.10 | Chronic gingivitis, plaque induced | BILLABLE CODE |
| K05.11 | Chronic gingivitis, non-plaque induced | BILLABLE CODE |
| K05.2 | Aggressive periodontitis | NON-BILLABLE CODE |
| K05.20 | Aggressive periodontitis, unspecified | BILLABLE CODE |
| K05.21 | Aggressive periodontitis, localized | NON-BILLABLE CODE |
| K05.211 | Aggressive periodontitis, localized, slight | BILLABLE CODE |
| K05.212 | Aggressive periodontitis, localized, moderate | BILLABLE CODE |
| K05.213 | Aggressive periodontitis, localized, severe | BILLABLE CODE |
| K05.219 | Aggressive periodontitis, localized, unspecified severity | BILLABLE CODE |
| K05.22 | Aggressive periodontitis, generalized | NON-BILLABLE CODE |
| K05.221 | Aggressive periodontitis, generalized, slight | BILLABLE CODE |
| K05.222 | Aggressive periodontitis, generalized, moderate | BILLABLE CODE |
| K05.223 | Aggressive periodontitis, generalized, severe | BILLABLE CODE |
| K05.229 | Aggressive periodontitis, generalized, unspecified severity | BILLABLE CODE |
| K05.3 | Chronic periodontitis | NON-BILLABLE CODE |
| K05.30 | Chronic periodontitis, unspecified | BILLABLE CODE |
| K05.31 | Chronic periodontitis, localized | NON-BILLABLE CODE |
| K05.311 | Chronic periodontitis, localized, slight | BILLABLE CODE |
| K05.312 | Chronic periodontitis, localized, moderate | BILLABLE CODE |
| K05.313 | Chronic periodontitis, localized, severe | BILLABLE CODE |
| K05.319 | Chronic periodontitis, localized, unspecified severity | BILLABLE CODE |
| K05.32 | Chronic periodontitis, generalized | NON-BILLABLE CODE |
| K05.321 | Chronic periodontitis, generalized, slight | BILLABLE CODE |
| K05.322 | Chronic periodontitis, generalized, moderate | BILLABLE CODE |
| K05.323 | Chronic periodontitis, generalized, severe | BILLABLE CODE |
| K05.329 | Chronic periodontitis, generalized, unspecified severity | BILLABLE CODE |
| K05.4 | Periodontosis | BILLABLE CODE |
| K05.5 | Other periodontal diseases | BILLABLE CODE |
| K05.6 | Periodontal disease, unspecified | BILLABLE CODE |
