| K04 | Diseases of pulp and periapical tissues | NON-BILLABLE CODE |
| K04.0 | Pulpitis | NON-BILLABLE CODE |
| K04.01 | Reversible pulpitis | BILLABLE CODE |
| K04.02 | Irreversible pulpitis | BILLABLE CODE |
| K04.2 | Pulp degeneration | BILLABLE CODE |
| K04.3 | Abnormal hard tissue formation in pulp | BILLABLE CODE |
| K04.4 | Acute apical periodontitis of pulpal origin | BILLABLE CODE |
| K04.5 | Chronic apical periodontitis | BILLABLE CODE |
| K04.6 | Periapical abscess with sinus | BILLABLE CODE |
| K04.7 | Periapical abscess without sinus | BILLABLE CODE |
| K04.8 | Radicular cyst | BILLABLE CODE |
| K04.9 | Other and unspecified diseases of pulp and periapical tissues | NON-BILLABLE CODE |
| K04.90 | Unspecified diseases of pulp and periapical tissues | BILLABLE CODE |
| K04.99 | Other diseases of pulp and periapical tissues | BILLABLE CODE |
