I will never allow a midlevel to do contours/plan evaluation. They are there to do notes for me. The job market is bad enough as it is, I do not want NPs/PAs replacing MDs in the technical aspect of the field. I think if you are a physician who is having NPs/PAs do contours that is not good practice. Worse than having a dosimetrist do your GTV/CTV/PTV contours.
Not my current practice, but saw it while I was in training. The line was drawn at the mid-levels doing the contours, but always need to be reviewed before sending to dosimetry. Similar to a resident's function. Never would allow plan evaluation, even if were allowed. I don't let dosimetrists do target volumes either. Finding a mid-level that wants to learning contouring is pretty rare, from what I've seen. It seemed like the ones that did wanted to have something over the residents. I don't think we have to worry about this becoming widespread, unless there was a significant financial incentive for the mid-levels to do so, like in anesthesia.