It’s now possible to use FSA/HSA cards directly on Amazon. Amazon has provided a useful F.A.Q here (our affiliate link and below) and eligible products should be listed as ‘FSA or HSA Eligible’. In addition you can find a full list of HSA/FSA eligible products here. Keep in mind you’d be better off using a credit card that earns at a high rate on Amazon for these purchases and then reimbursing yourself. 
