Yes. Like all anesthesia professionals, CRNAs collaborate with all members of the surgical team including surgeons, endoscopists, radiologists, podiatrists, obstetricians and other physician specialists to ensure the safest, most comfortable experience possible for their patients. State laws and regulations vary on whether CRNAs must be supervised by a physician; well over half of all states do not require physician supervision. In any case, nurse anesthetists always are independently responsible for their own actions. Surgeons quite properly defer to nurse anesthetists as the experts in anesthesia care.