Can someone direct me to guidelines on how to bill for peripheral nerve blocks (64446) and the facility for the surgical procedure itself? For example, the anesthesiologist provides the block using US, a CRNA provides anesthesia during the surgical procedure such as an austin bunionectomy. I know the US is bundled into the facility fee but some are saying the block can not be billed by the facility unless it is the sole method of anesthesia. Any guidance would be greatly appreciated.