NAME: Carrier Claim Referring Provider ID Number (PIN) DESCRIPTION: The provider identification number (PIN) of the physician/supplier (assigned by the MAC) who referred the beneficiary to the physician who ordered these services. SHORT NAME: RFR_PRFL LONG NAME: CARR_CLM_RFRNG_PIN_NUM TYPE: CHAR LENGTH: 14 SOURCE: CWF CODE VALUES: - COMMENT: CMS identifies providers using the National Provider Identifier (NPI; effective May 1, 2007), which replaces legacy numbers (UPINs, PINs, etc.) on the standard HIPPA claim transactions.