NAME: Carrier Line Performing NPI Number DESCRIPTION: The National Provider Identifier (NPI) assigned to the performing provider. SHORT NAME: PRFNPI LONG NAME: PRF_PHYSN_NPI TYPE: CHAR LENGTH: 12 SOURCE: CWF CODE VALUES: - COMMENT: Effective May 2007, the NPI became the national standard identifier for covered health care providers. NPIs replaced the legacy numbers (UPINs, PINs, etc.) on the standard HIPPA claim transactions. The UPIN is almost never populated after 2009.