{"result_count":1,"results":[{"addresses":[{"address_1":"410 HOSPITAL DR","address_purpose":"LOCATION","address_type":"DOM","city":"WARRENTON","country_code":"US","country_name":"United States","fax_number":"540-347-0900","postal_code":"201863026","state":"VA","telephone_number":"540-347-1314"},{"address_1":"PO BOX 748613","address_purpose":"MAILING","address_type":"DOM","city":"ATLANTA","country_code":"US","country_name":"United States","fax_number":"540-825-0644","postal_code":"303748613","state":"GA","telephone_number":"434-295-1000"}],"basic":{"certification_date":"2025-07-28","credential":"M.D.","enumeration_date":"2006-10-17","first_name":"DAVID","last_name":"PFEFFER","last_updated":"2025-07-28","middle_name":"M","sex":"M","sole_proprietor":"NO","status":"A"},"created_epoch":"1161102362000","endpoints":[],"enumeration_type":"NPI-1","identifiers":[{"code":"05","desc":"MEDICAID","identifier":"7540582","issuer":null,"state":"VA"}],"last_updated_epoch":"1753737674000","number":"1124108600","other_names":[],"practiceLocations":[],"taxonomies":[{"code":"208800000X","desc":"Urology","license":"0101046240","primary":true,"state":"VA","taxonomy_group":""}]}]}