_dta:
  1.  by Jean Roth , jroth@nber.org , 25 Dec 2014
  2.  by Jean Roth , jroth@nber.org , 25 Dec 2014

entity:
  1.  1, Individual
  2.  2, Organization

  obs:       808,041                          
 vars:             6                          25 Dec 2014 04:42
 size:    31,513,599                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
---------------------------------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier (NPI)
seq             byte    %9.0g                 # of Other Provider Identifier in NPPES file
upin            str6    %9s                   Unique Physician Identification Number (UPIN)
upintype        byte    %109.0g    upintype   Type of UPIN
entity          byte    %12.0g     entity   * Entity Type Code:  NPI is Individual or Organization
pcredential     str20   %20s                  Provider Credential Text
                                            * indicated variables have notes
---------------------------------------------------------------------------------------------------------
Sorted by:  upin  npi
upintype:
           1 Medical Doctors (Medical Doctors and Doctors of Osteopathy) 
           2 Non-physician Practicioners (Such as Anesthesia Assistants, Physician Assistants, Clinical N
> urse Practioners) 
           3 Other Doctors (Such as Chiropractors, Dentists, Podiatrists, and Optometrists) 
           4 Group UPIN 
entity:
           1 Individual 
           2 Organization