I have a Licensed Surgical Assistant in TX billing for 59514-AS, 58700-AS or 58552-AS, 57283-AS or 59514-AS while the primary surgeon is billing for 59510. My understanding is that the AS Modifier is for PA's, NP's or CNS. Therefore how are Licensed Surgical Assistants supposed to bill for their services? Do they some how fall under this category? Any feed back or direction would be appreciated.