unique provider identification number


u·nique pro·vi·der iden·ti·fi·ca·tion num·ber

(UPIN) (yū-nēk' prō-vī'dĕr ī-den'ti-fi-kā'shŭn nŭm'bĕr) Numeric designation, much like a Social Security number, which is used to determine a provider of a health care service for insurance purposes.