{"result_count":1,"results":[{"addresses":[{"address_1":"390 TOLL GATE RD","address_2":"SUITE 108","address_purpose":"MAILING","address_type":"DOM","city":"WARWICK","country_code":"US","country_name":"United States","fax_number":"401-921-5679","postal_code":"028864326","state":"RI","telephone_number":"401-921-5672"},{"address_1":"390 TOLL GATE RD","address_2":"SUITE 108","address_purpose":"LOCATION","address_type":"DOM","city":"WARWICK","country_code":"US","country_name":"United States","fax_number":"401-921-5679","postal_code":"028864326","state":"RI","telephone_number":"401-921-5672"}],"basic":{"certification_date":"2026-04-29","credential":"M.D.","enumeration_date":"2005-09-20","first_name":"KEITH","last_name":"CALLAHAN","last_updated":"2026-04-29","middle_name":"L","name_prefix":"--","name_suffix":"--","sex":"M","sole_proprietor":"NO","status":"A"},"created_epoch":"1127216093000","endpoints":[],"enumeration_type":"NPI-1","identifiers":[{"code":"01","desc":"Other (non-Medicare)","identifier":"32250-6","issuer":"BLUE CROSS","state":"RI"},{"code":"01","desc":"Other (non-Medicare)","identifier":"414283","issuer":"BLUE CHIP","state":"RI"},{"code":"01","desc":"Other (non-Medicare)","identifier":"496-667","issuer":"TUFTS","state":"RI"},{"code":"01","desc":"Other (non-Medicare)","identifier":"810900591","issuer":"MULTIPLAN/PHCS","state":"RI"},{"code":"01","desc":"Other (non-Medicare)","identifier":"9201212","issuer":"CIGNA","state":"RI"},{"code":"01","desc":"Other (non-Medicare)","identifier":"AA98861","issuer":"HARVARD PILGRIM","state":"RI"}],"last_updated_epoch":"1777476206000","number":"1629063219","other_names":[],"practiceLocations":[],"taxonomies":[{"code":"207Q00000X","desc":"Family Medicine","license":"MD12303","primary":true,"state":"RI","taxonomy_group":""}]}]}