The claims processing manual and the NCCI policy manual for medicare services were the two resources that I think you cou obtain some helpful information. The confusing thing about your question is you did not state if was an establlished or new patient. To me, if was an established patients and they were coming in for a facet block there would be no separate E/M charge. If they were a new patient I would assume the physician would have to be the one seeing the patient not the PA.
http://www.cms.gov/manuals/downloads/clm104c12.pdf
http://www.cms.gov/nationalcorrectcodinited/
If a procedure has a global period of 000 or 010 days, it is defined as a minor surgical procedure. The decision to perform a minor surgical procedure is included in the payment for the minor surgical procedure and should not be reported separately as an
E&M service. However, a significant and separately identifiable E&M service unrelated to the decision to perform the minor surgical procedure is separately reportable with modifier 25.
The E&M service and minor surgical procedure do not require different diagnoses. If a minor surgical procedure is performed on a new patient, the same rules for reporting E&M services apply. The fact that the patient is “new” to the provider is not sufficient alone to justify reporting an E&M service on the same date of service as a minor surgical procedure. NCCI does contain some edits based on these principles, but the Medicare Carriers (A/B MACs processing practitioner service claims) have separate edits. Neither the NCCI nor Carriers (A/B MACs processing practitioner service claims) have all possible edits based on these principles.
Example: If a physician determines that a new patient with head trauma requires sutures, confirms the allergy and immunization status, obtains informed consent, and performs the repair, an E&M service is not separately reportable. However, if the physician also performs a medically reasonable and necessary full neurological examination, an E&M service may be separately reportable.
Procedures with