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Short SAS Name
RFR_PHYSN_NPI
SAS Name
RFRG_NPI

The national provider identifier (NPI) number assigned to uniquely identify the referring physician.

Comments

* The short SAS name is RFR_NPI in the Carrier and DME files.

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

Source: NCH