On October 25, 2017, FDA issued a final guidance: Deciding When to Submit a 510(k) for a Change to an Existing Device. This guidance is a final version of the draft issued in 2016 (see our post on the 2016 draft here). Despite receiving a significant number of comments, the final guidance is largely unchanged from the 2016 draft. Industry should also be comforted to know that the final guidance is also, at its core, very similar to the 1997 guidance – a welcome relief as compared to the 2011 draft guidance.