Carrier/DMERC Claim Referring Physician UPIN Number

SAS Name
RFRG_PHYSN_NPI

The unique physician identification number (UPIN) of the physician who referred the beneficiary or the physician who ordered the Part B services or durable medical equipment (DME).

NPIs replaced UPINs as the standard provider identifiers beginning in 2007. The UPIN is almost never populated after 2009.

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Source: NCH