77401 Radiation treatment delivery, superficial and/or ortho voltage
77402 Radiation treatment delivery, single treatment area, single port or parallel opposed ports, simple blocks or no blocks; up to 5 MeV
77403 ... 6-10 MeV
77404 ... 11-19 MeV
77406 ... 20 MeV or greater
77407 Radiation treatment delivery, two separate treatment areas, three or more ports on a single treatment area, use of multiple blocks; up to 5 MeV
77408 ... 6-10 MeV
77409 ... 11-19 MeV
77411 ... 20 MeV or greater
77412 Radiation treatment delivery, three or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, special particle beam (e.g., electron or neutrons); up to 5 MeV
77413 ... 6-10 MeV
77414 ... 11-19 MeV
77416 ... 20 MeV or greater.