_dta:
  1.  by Jean Roth , jroth@nber.org , 16 Dec 2017

  obs:     5,109,774                          
 vars:             3                          16 Dec 2017 10:01
 size:   189,061,638                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
seq             float   %9.0g                 # of Other Provider Identifier in
                                                NPPES file
othpid          str23   %23s                  Other Provider Identifier
-------------------------------------------------------------------------------
Sorted by: npi  seq