Polly, I had 8 teeth extracted before radiation and back in 2003, Medicare was just beginning to reimburse for this, at the rate of $50/tooth. I had the oral surgeon come in while I was under general anesthesia, getting my PEG and portacath put in at the same time.
Regarding cutting back or saving costs, your approach would have one questioning every procedure and maybe opting out of some, in hopes of reducing the overall bill. I don't think it is realistic and unless you can perform or provide the service, I'm not sure it's the best decision, either. I assume this care is from a major cancer center as well. The treatment protocols are standardized, in a sense, with the allied health requirements determined before treatment begins.