| 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 |
