Question: Florida Subscriber Answer: Yes, for CPT purposes, a certified nurse specialist billing under his own provider number counts the same as a nurse practitioner or physician assistant. So if the office visit meets the requirements for time-based billing-- counseling and/or coordination of care comprises more than 50 percent of the face-to-face CNS-patient encounter and documentation indicates the encounter's total face-to-face time, the counseling minutes, and a discussion summary-- the CNS can choose the office level using time, such as 15 face-to-face minutes for 99213 (Office or other outpatient visit for the evaluation and management of an established patient ...) as the sole criteria. Be careful: Check your state law. State scope of practice laws may restrict services and procedures that nonphysician practitioners may provide.