Per the Medicare Benefit Policy Manual, Chap 15, Sec 60: "(Physician assistants, nurse practitioners, clinical nurse specialists, certified nurse midwives, clinical psychologists, clinical social workers, physical therapists and occupational therapists all have their own benefit categories and may provide services without direct physician supervision and bill directly for these services. When their services are provided as auxiliary personnel (see under direct physician supervision, they may be covered as incident to services, in which case the incident to requirements would apply."
This Chapter has a lot of good information that may help answer your question.
Does anyone know if a Registered Dietitan or Genetic Counselor would be able to see patients Incident To a physicians service?
Thanks.