Extensive neurolysis of radial, median or ulnar nerve trunk nerve in the forearm or arm, other than a service associated with: (a) a service to which item 39303, 39309, 39312, 39315, 39318, 39324 or 39327 applies; or (b) a service to which item 30023 applies that is performed at the same site (H) (Anaes.) (Assist.)