Direct Identifier

CDISC-Gloss – A piece of data that can be used to uniquely identify an individual (e.g., name, patient ID, social security number, exact address, telephone number, e-mail address, government issued identifiers, passport/VISA numbers) either without additional information or with cross-linking through other information that is in the public domain. [After PhUSE De-identification Standard for SDTM 3.2, version 1.0.1.]