We have two insurance carriers that do not allow us to bill under the Nurse Practitioner’s NPI (Anthem and United – although, they are credentialed with United). What are the requirements/definition for the "supervising physician"? Do they have to be onsite in order to be considered the "supervising physician"? Do they have to sign off on these charts? If the physician has to sign off on the NPs’ charts, do they have to be present in the office during the visit?

Please advise! Thanks!