Home › Forums › BILLERS’ BOARD › blue cross blue shield wants a modifier This topic has 2 voices and 1 reply. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts December 18, 2019 at 9:51 am #12860 AnonymousGuest if billing using 1500 claim form, what modifier would you use for flu shot and admin. billing December 19, 2019 at 7:58 am #23402 Missouri Public Health AssociationKeymaster We haven’t put in any modifier for BCBS. Just 90471 for Administration and our 90686 for flu vaccine.We only use 1500 forms. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In