Repeat skin prick testing of a patient for aeroallergens, including all allergens tested on the same day, if: (a) further testing for aeroallergens is indicated in the same 12 month period to which item 12001 applies to a service for the patient; and (b) the service is not associated with a service to which item 12000, 12001, 12005, 12012, 12017, 12021, 12022 or 12024 applies Applicable only once in any 12 month period