Supersedes 1997 guidance. FDA issued a new Final guidance entitled “Deciding When to Submit a 510(k) for a Change to an Existing Device” dated Oct. 25, 2017. TThe full guidance is at the link provided. Note that FDA simultaneously released a Final guidance for when to submit a new 510(k) for software changes specifically. Deciding When to Submit a 510(k) for a Change to an Existing Device