Retrieval and review of one or more archived formalin fixed paraffin embedded blocks to determine the appropriate samples for the purpose of conducting genetic testing, other than: (a) a service associated with a service to which item 72858 or 72859 applies; or (b) a service associated with, and rendered in the same patient episode as, a service to which an item in Group P5, P6, P10 or P11 applies Applicable not more than once in a patient episode