filter.php

<?php 

 $filter = array (
  'npi' => 'npi',
  'entity_type_code' => 'entity_type_code',
  'provider_first_line_business_practice_location_address' => 'address_first_line',
  'provider_second_line_business_practice_location_address' => 'address_second_line',
  'provider_business_practice_location_address_city_name' => 'address_city_name',
  'provider_business_practice_location_address_state_name' => 'address_state_name',
  'provider_business_practice_location_address_postal_code' => 'address_postal_code',
  'provider_business_practice_location_address_country_code_if_outside_u.s.' => 'address_country_code',
  'provider_business_practice_location_address_telephone_number' => 'telephone_number',
  'provider_business_practice_location_address_fax_number' => 'fax_number',
  'provider_gender_code' => 'provider_gender_code',
);

 ?>