Medicare Coverage/Billing for H1N1 Vaccine By Debra A. McCurdy on 4 September 2009 Print:Email this postLike this postShare this post on LinkedIn CMS has issued an educational article on “Billing for the Administration of the Influenza A (H1N1) Vaccine,” which explains Medicare coverage and reimbursement rules for the H1N1 vaccine and also addresses seasonal flu coverage and reimbursement.