So the part in the CMS Manual about Part B services doesn't apply to services off the unit in CT, MRI or Nuc Med?
Thanks for your help. I use average times but our system calculates observation hours based on start and end observation time entered in boxes. In a separate program, carve out time must also be entered based on a start and stop time. If we just manually adjust the observation hours, the system will reverse the manual charges and post back charges based on the original start and end times. Like you've said, it's a lot of work for little return.