skill nursing facility annual comprehensive reassessment code 99318

what is nessary to code the comprehensive exam in the annual comprehensive
reassessment for SNF?
Is the comprehensive exam in the reassessment the same as a E/M COMPREHENSIVE EXAM or is it a preventive comprehensive exam?
Can our NP bill incendent too in a SNF for the annual reassessment if physician is in the same facility?
can NP bill incendent too in a SNF for any E/M service?