The test injection of opioid medication (usually morphine) may be billed using one of the following CPT-4 codes:
CPT-4 Code Definition
62318 Injection, including catheter placement, continuous infusion or intermittent bolus, not including neurolytic substances, with or without contrast (for either localization or epidurography), of diagnostic or therapeutic substance(s) (including anesthetic, antispasmodic, opioid, steroid, other solution), epidural or subarachnoid; cervical or thoracic
62319 lumbar, sacral (caudal)
Note: Reimbursable only if the Remarks area/Reserved For Local Use field (Box 19) of the claim, or a claim attachment, includes a statement that the epidural line was not used during the surgical procedure, but placed for post-operative management.