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

  obs:     4,656,132                          
 vars:             2                          21 Nov 2015 07:09
 size:    51,217,452                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
pprimtax1       str1    %9s                   Healthcare Provider Primary
                                                Taxonomy Switch 1
-------------------------------------------------------------------------------
Sorted by:  npi