Earlier quoted context omitted.
I've worked with several large healthcare organizations in a consulting capacity. You would be laughed out of a room for suggesting SSN or name and birthday as the primary identifier for an individual. All used an internal patient ID. Some had processes that would use an SSN or name and birthday as inputs to an identification procedure. These procedures would invariably include additional steps. It's perfectly reason…
The allocation of a PRN to identify patients is an explicit requirement of HIPPA which was introduced in response to the exact problems you discuss, which were common prior to the change.
> name and DOB are not unique, but this doesn't stop them being near universally used as primary identifier in healthcare information systems