(These are my opinions and should not be construed as being the final authority. Other opinions may vary.)
If a catheter is threaded from the level that it was inserted up to another level(s), and this new level(s) is/are injected, use the ESI catheter codes 62318 or 62319. In your code description above you indicate; "...for indwelling and continuous infusion or intermittent bolus." This is not what the code description says. Here is the entire description:
"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."
The word 'indwelling' does not appear in the description. 'Continuous infusion' means continuously infusing the medication while pulling the catheter from level to level. 'Intermittent bolus' means stopping the catheter at level(s) to infuse the medication. So, in other words, 62318 and 62319 are codes for an ESI injection that uses a catheter to infuse different level(s) than the entry point.
Richard Mann, your pain management coder
rkmcoder@yahoo.com