On September 24, 2013, the Food and Drug Administration (FDA) issued a “final” rule regarding the Unique Device Identification System to adequately identify devices through distribution and use. The FDA has since issued several guidances updating implementation of the unique device identifier (UDI). On November 5, 2018, the FDA issued its latest UDI policy, “Unique Device Identification: Policy Regarding Compliance Dates for Class I and Unclassified Devices and Certain Devices Requiring Direct Marking,” which supersedes the direct marking deadlines mandated by an earlier guidance.