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

  obs:     6,540,997                          
 vars:             3                          16 Dec 2017 10:20
 size:    98,114,955                          (_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 Healthcare Provider Primary
                                                Taxonomy Switch in NPPES file
pprimtax        str1    %9s                   Healthcare Provider Primary
                                                Taxonomy Switch
-------------------------------------------------------------------------------
Sorted by: npi  seq