Question: Answer: Beware: You will not use this code for the flu vaccines available for the Fall 2010 flu season. Code 90470 is for H1N1 only, not H1N1 plus influenza. There is no current vaccine product for H1N1 only. H1N1 antigen is included in all the general flu vaccine products. You will use 90460 for vaccine administration with counseling of products that contain influenza and H1N1.