{"result_count":1,"results":[{"addresses":[{"address_1":"138 CONANT ST","address_2":"1ST FL","address_purpose":"LOCATION","address_type":"DOM","city":"BEVERLY","country_code":"US","country_name":"United States","fax_number":"978-927-5174","postal_code":"019151665","state":"MA","telephone_number":"978-927-5254"},{"address_1":"280 MERRIMACK ST STE 311","address_purpose":"MAILING","address_type":"DOM","city":"LAWRENCE","country_code":"US","country_name":"United States","fax_number":"978-691-5693","postal_code":"018431779","state":"MA","telephone_number":"978-691-5690"}],"basic":{"credential":"M.D.","enumeration_date":"2006-09-13","first_name":"DAVID","last_name":"GREENSTEIN","last_updated":"2017-10-18","middle_name":"S","name_prefix":"Dr.","sex":"M","sole_proprietor":"NO","status":"A"},"created_epoch":"1158139004000","endpoints":[],"enumeration_type":"NPI-1","identifiers":[{"code":"01","desc":"Other (non-Medicare)","identifier":"0108481Y0NH01","issuer":"ANTHEM NEW HAMPSHIRE","state":"NH"},{"code":"01","desc":"Other (non-Medicare)","identifier":"070007725","issuer":"RAILROAD MEDICARE","state":"MA"},{"code":"01","desc":"Other (non-Medicare)","identifier":"081143","issuer":"TUFTS","state":"MA"},{"code":"01","desc":"Other (non-Medicare)","identifier":"400020","issuer":"HARVARD","state":"MA"},{"code":"01","desc":"Other (non-Medicare)","identifier":"514226","issuer":"AETNA","state":"MA"},{"code":"01","desc":"Other (non-Medicare)","identifier":"J31553","issuer":"BCBS MASSACHUSETTS","state":"MA"},{"code":"01","desc":"Other (non-Medicare)","identifier":"P00395117","issuer":"RAILROAD MEDICARE","state":"NH"}],"last_updated_epoch":"1508332577000","number":"1205931789","other_names":[],"practiceLocations":[],"taxonomies":[{"code":"207N00000X","desc":"Dermatology","license":"81143","primary":true,"state":"MA","taxonomy_group":""}]}]}