Document records 12:34 is the start of medication being given by RN. At 1:04 the CRNA starts the Propofol and ends at 1:20. The reason stated is below. Do I bill under the CRNA using the total time 12:34 thru 13:20? Or am I only allowed to bill for the time the CRNA was actually involved? Thanks for any insight, it would be appreciated.