We have a situation in our Pedicatric doctors office verses our billing office. we bill a 94760 oxygen sat single with an E/M-25 only. our billing office have the system set up to edit the pulse oximetry to add the 59 modifier. i don't think i should be adding the 59 modifier on the first procedure line and it's the only procedure. our billing office says it's per the insurance guidelines, policies and from the appeals of denied claims to justify adding the 59 modifier. Should I be concern about this? Will this put our Pediactric office in jeopardy of an audit?