Does anyone know if there is an updated coding guidance on billing the erector spinae plane nerve block? The guidance I have seen is to use the unlisted code 64999 with a description of the procedure added. Unfortunately Medicare will not reimburse the unlisted code and our anesthesiologists are starting to use this block for post-operative pain control for CABGs. It was suggested by one of our doctors to use 64461. Any guidance would be greatly appreciated.