_dta:
  1.  by Jean Roth , jroth@nber.org , 21 Nov 2015

  obs:     5,675,557                          
 vars:             3                          21 Nov 2015 11:42
 size:    85,133,355                          (_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