primary care office looking to bring on a NP of dermatology

Best answers
So our office is looking at adding an NP of dermatology to the office. As you know we are primary care. I was wondering if anyone had some answers to the questions we have re billing and credentialing her.
  • can we bring in a specialty NP under our tax ID and them be paid FFS or would they be capped as well?
  • can we refer to her the same day she is in the office with another provider and get paid being it's a different specialty?
  • do we have to change the group designation from primary care to multi specialty?
And there are probably more questions I am missing.... but this is a start. Thanks in advance.