Wiki anesthesia done by obgyn physicians

[Korbc]

Hey guys,
general consensus seems to be that the physician/surgeon doing the procedure can't charge for the anesthesia separately, more specifically nitrous oxide , and a friend sent me a cms and medicare packet about anesthesia services and it reiterates that except for certain circumstances but not sure about other insurers or locations. I was wondering if anyone had any more info they could provide me regarding this?

Thanks!!