@thomas7331 is correct that there is not a professional component for these codes. If your POS is 22, the physicist's charges would go on the facility bill. The physician would not bill for the physics services.
I code and bill for Radiation Oncology professional fees, and I also work closely with my facility counterparts who code/bill the technical components.
I asked what payor was giving the denial for POS 22 because Aetna Medicare has been having strange denials pop up recently. I'm in a radiation oncology coding and billing discussion group, and many people are having different issues with Aetna Medicare. Some of them have been told by provider relations that systems have been updated to resolve some of those issues and claims will be reprocessed - we'll see. I'm keeping a close eye on my Aetna Medicare in the meantime.
The issue that I personally have been encountering is CT guidance codes denying invalid POS 22. Which is, of course, ridiculous. POS 22 is the most typical setting for performing radiation oncology services!
If your issue is with a different payor, it might help if you share what payor. Someone else might be aware of additional issues.