_dta:
  1.  ppefaddr set up by Jean Roth , jroth@nber.org , 15 Apr 2019
  2.  NBER URL: http://www.nber.org/data/cms-public-provider-enrollment-data-ppef.html
  3.  Source Page: https://data.cms.gov/public-provider-enrollment
  4.  Source File: Address_Sub-_File.csv
  5.  This file contains an enrollment ID crosswalk between those individual providers
      reassigning
  6.  their benefits and those providers receiving the reassignment of benefits.

enrlmt_id:
  1.  Provider enrollment ID from PECOS database used to link across tables
  2.  An Enrollment ID is a 15-digit unique alphanumeric identifier that is assigned to
      each new provider enrollment application.
  3.  All enrollment-level information (e.g., enrollment type, enrollment state, provider
      specialty and reassignment of benefits)
  4.  is linked through the Enrollment ID.
  5.  All Enrollment IDs that reassign their benefits to bill Medicare to this Enrollment
      ID are also associated with the practice location."

city_name:
  1.  Provider practice location city.
  2.  Each practice location is linked to an Enrollment ID.
  3.  If any other provider reassigns benefits to an Enrollment ID listed in the Practice
      Location file,
  4.  the practice location is also associated with that other provider."

zip_cd:
  1.  Provider practice location zip code.
  2.  Each practice location is linked to an Enrollment ID.
  3.  If any other provider reassigns benefits to an Enrollment ID listed in the Practice
      Location file,
  4.  the practice location is also associated with that other provider.

state_cd:
  1.  Provider practice location state, see STATE_CD - Reference tab for description of
      values.
  2.  Each practice location is linked to an Enrollment ID.
  3.  If any other provider reassigns benefits to an Enrollment ID listed in the Practice
      Location file,
  4.  the practice location is also associated with that other provider.

state_cdstr:
  1.  Provider practice location state, see STATE_CD - Reference tab for description of
      values.
  2.  Each practice location is linked to an Enrollment ID.
  3.  If any other provider reassigns benefits to an Enrollment ID listed in the Practice
      Location file,
  4.  the practice location is also associated with that other provider.

  obs:       989,534                          
 vars:             5                          15 Apr 2019 16:46
 size:    51,455,768                          (_dta has notes)
------------------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
------------------------------------------------------------------------------------------
enrlmt_id       str15   %15s                * Provider enrollment ID from PECOS database
                                                used to link across tables
city_name       str30   %30s                * Provider practice location city.
zip_cd          long    %12.0g              * Provider practice location zip code
state_cd        byte    %10.0g     state_cd * Provider practice location state:
state_cdstr     str2    %9s                 * Provider practice location state:
                                            * indicated variables have notes
------------------------------------------------------------------------------------------
Sorted by: enrlmt_id  city_name  zip_cd  state_cd
state_cd:
           1 AL 
           2 AK 
           3 AS 
           4 AZ 
           5 AR 
           6 CA 
           7 CZ 
           8 CO 
           9 CT 
          10 DE 
          11 DC 
          12 FL 
          13 GA 
          14 GU 
          15 HI 
          16 ID 
          17 IL 
          18 IN 
          19 IA 
          20 KS 
          21 KY 
          22 LA 
          23 ME 
          24 MD 
          25 MA 
          26 MI 
          27 MN 
          28 MS 
          29 MO 
          30 MT 
          31 NE 
          32 NV 
          33 NH 
          34 NJ 
          35 NM 
          36 NY 
          37 NC 
          38 ND 
          39 OH 
          40 OK 
          41 OR 
          42 PA 
          43 PR 
          44 RI 
          45 SC 
          46 SD 
          47 TN 
          48 TX 
          49 UT 
          50 VT 
          51 VA 
          52 VI 
          53 WA 
          54 WV 
          55 WI 
          56 WY 
          64 FM 
          68 MH 
          69 MP 
          70 PW