| G89 | Pain, not elsewhere classified | NON-BILLABLE CODE |
| G89.0 | Central pain syndrome | BILLABLE CODE |
| G89.1 | Acute pain, not elsewhere classified | NON-BILLABLE CODE |
| G89.11 | Acute pain due to trauma | BILLABLE CODE |
| G89.12 | Acute post-thoracotomy pain | BILLABLE CODE |
| G89.18 | Other acute postprocedural pain | BILLABLE CODE |
| G89.2 | Chronic pain, not elsewhere classified | NON-BILLABLE CODE |
| G89.21 | Chronic pain due to trauma | BILLABLE CODE |
| G89.22 | Chronic post-thoracotomy pain | BILLABLE CODE |
| G89.28 | Other chronic postprocedural pain | BILLABLE CODE |
| G89.3 | Neoplasm related pain (acute) (chronic) | BILLABLE CODE |
| G89.4 | Chronic pain syndrome | BILLABLE CODE |
