Eeg 95951

I have been given this direction for the billing of video eeg's. I cannot find any documentation confirming this is the proper way to support a 95951. Any guidance is appreciated

Duration: The video EEG?s require the duration and/or start and stop times to be indicated within the documentation. When the EEG is less than 12 hours, indicate the duration, such as 2, 4, 6, 8 hours. For EEG?s that are 12 hours or more the start and stop times need to be indicated. Example: Video/EEG began at 0900 hrs on October 10, 2010 and ended at 0900 hrs on October 11, 2010). This information is vital to the appropriate assignment of CPT codes and modifiers

Eeg 95951