09/16/2026
Thoracic ESP blocks now have their own CPT codes (64466–64469). Lumbar ESP blocks don't — they still fall under 64999, the unlisted procedure code, with manual payer review every time.
The difference-maker in your documentation: exact vertebral level, laterality, and technique. Miss one and you're looking at a denial or payer query.
Read the full breakdown and grab our quick-reference guide — link in comments.