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

  obs:     4,980,682                          
 vars:             3                          21 Nov 2015 11:36
 size:   169,343,188                          (_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          str20   %20s                  Other Provider Identifier
-------------------------------------------------------------------------------
Sorted by:  npi  seq